Jan. 14, 2025

James Webb’s First Light, Galactic Anomalies & Space Surprises: #486 - Holiday Special 6 | Space...

James Webb’s First Light, Galactic Anomalies & Space Surprises: #486 - Holiday Special 6 | Space...
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James Webb’s First Light, Galactic Anomalies & Space Surprises: #486 - Holiday Special 6 | Space...

Space Nuts Episode 486: James Webb's First Image and Cosmic Mysteries Unveiled

Join Andrew Dunkley and Professor Fred Watson as they delve into the latest astronomical marvels in this exciting episode of Space Nuts. From the groundbreaking first image captured by the James Webb Space Telescope to intriguing listener questions about galaxy sizes and cosmic mysteries, this episode is packed with stellar insights.

Episode Highlights:

- James Webb's First Image: Discover the breathtaking first image from the James Webb Space Telescope, revealing a cluster of galaxies in stunning detail. Learn how this new tool surpasses the Hubble Telescope's capabilities and what it means for the future of space exploration.

- Galaxy Size Anomalies : Explore the fascinating question from Alex in New South Wales about why galaxies appear to change size at different distances. Fred Watson Watson explains the peculiar properties of our expanding universe that lead to this phenomenon.

- Dark Matter Discoveries: Anna from Astronomy Daily shares groundbreaking research into the GD1 Stellar Stream, suggesting a new understanding of dark matter involving self-interacting subhalos. Discover how this could revolutionise our knowledge of the universe's fundamental structure.

- China's Rocket Advancements : Learn about China's impressive technological strides with successful tests of multiple rocket engines in a single day. Understand how these developments could impact future lunar and Mars missions.

For more Space Nuts, including our continually updating newsfeed and to listen to all our episodes, visit our website. (https://www.spacenutspodcast.com/about)

Stay curious, keep looking up, and join us next time for more stellar insights and cosmic wonders. Until then, clear skies and happy stargazing.

00:00 - Andrew Dunkley welcomes Professor Fred Watson to Space Nuts

02:53 - The James Webb Space Telescope has released its first deep field image

10:32 - Fred and Andrew welcome Alex from Bellingen, New South Wales

11:00 - It's common understanding that distance reduces apparent size of galaxies

15:31 - Astronomers may have finally cracked a long standing cosmic mystery about GD1

17:57 - China conducted tests of five different rocket engines in a single day

✍️ Episode References

James Webb Space Telescope

https://www.jwst.nasa.gov/

Hubble Space Telescope

https://www.nasa.gov/mission_pages/hubble/main/index.html

SMACS 0723

https://en.wikipedia.org/wiki/SMACS_J0723.3%E2%80%937327

Abel clusters

https://ned.ipac.caltech.edu/level5/Abell/frames.html

Astronomy Daily

https://astronomydaily.io/

China Aerospace Science and Technology Corporation

http://www.spacechina.com/n25/n2014789/English/index.html



Become a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts--2631155/support (https://www.spreaker.com/podcast/space-nuts--2631155/support?utm_source=rss&utm_medium=rss&utm_campaign=rss) .

Episode link: https://play.headliner.app/episode/25064166?utm_source=youtube

00:00 - Andrew Dunkley welcomes Professor Fred Watson to Space Nuts

02:53 - The James Webb Space Telescope has released its first deep field image

10:32 - Fred and Andrew welcome Alex from Bellingen, New South Wales

11:00 - It’s common understanding that distance reduces apparent size of galaxies

15:31 - Astronomers may have finally cracked a long standing cosmic mystery about GD1

17:57 - China conducted tests of five different rocket engines in a single day

WEBVTT
Kind: captions
Language: en

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with Fred and I taking a little bit of a


00:00:02.760 --> 00:00:05.150
break we thought it'd be great to dig


00:00:05.160 --> 00:00:06.990
into the archives and see what sort of


00:00:07.000 --> 00:00:09.709
stories really captured the imaginations


00:00:09.719 --> 00:00:12.549
of people around the world things like


00:00:12.559 --> 00:00:14.829
opening up moon rocks 50 years after


00:00:14.839 --> 00:00:17.470
they were collected uh other things like


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the first photographs taken by James web


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or the first image of Sagittarius A star


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those are the kinds of things we've been


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talking about over the years so sit back


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relax and enjoy archival EP episodes of


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Space Nuts Space Nuts hi there thanks


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for joining us on another edition of


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Space Nuts my name is Andrew Dunley your


00:00:39.040 --> 00:00:42.549
host and today on the program we are


00:00:42.559 --> 00:00:44.630
going to be talking about the big news


00:00:44.640 --> 00:00:47.430
of the week probably the big news of the


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Year and that is the first image


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official image from the James web Space


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Telescope uh it's only been announced in


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the last hour or two since we started


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recording so uh it's fresh off the press


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or off the president's desk whichever


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way you want to look at it and Alex from


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New South Wales is apparently going to


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ask a question about the size of


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galaxies uh that's all to come on this


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edition of Space Nuts 15 seconds


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guidance is internal 10 9 ignition


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sequence start Space Nuts 5 4 3 2 1 2 3


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4 5 5 4 3 2 1 Space Nuts rep it feels


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good and joining us as always is


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Professor Fred what's an astronomer at


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large hello Fred how are you very well


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thanks very excited with all that's


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going on oh man it's just crazy town at


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the moment yeah it is the astronomy


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world is a Gog a Gog that's right that's


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not a word I get to use very


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often yeah go I like a Gog I think it's


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got a ring to


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it uh yeah that um we'll we'll get to


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that in a moment of course we have


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plenty to talk about and uh some


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audience questions as I as I


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mentioned uh and and you've got a studio


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guest Fred are you able to share this


00:02:13.440 --> 00:02:15.630
with our viewing audience if you're if


00:02:15.640 --> 00:02:17.869
you're watching us on YouTube You're get


00:02:17.879 --> 00:02:19.350
ready for a


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surprise let to let everybody know that


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he still exists there's muskat mus or


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family cat who normally doesn't uh come


00:02:27.760 --> 00:02:30.910
into the study here because it leaves


00:02:30.920 --> 00:02:32.830
copious quantities of hair wherever he


00:02:32.840 --> 00:02:34.869
goes but he's been asleep there in the


00:02:34.879 --> 00:02:37.309
chair all morning and all mostly


00:02:37.319 --> 00:02:40.309
afternoon so he's still here he's doing


00:02:40.319 --> 00:02:41.949
say much these days he's doing his hats


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proud because that's what cats do


00:02:44.400 --> 00:02:46.270
best


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yep it's good to have Muscat in the


00:02:50.560 --> 00:02:53.910
studio right let us get down to business


00:02:53.920 --> 00:02:57.550
and first on the agenda is this amazing


00:02:57.560 --> 00:02:59.830
image that has been delivered by the


00:02:59.840 --> 00:03:02.710
James web Space Telescope it's been a


00:03:02.720 --> 00:03:04.670
lot of anticipation about what the first


00:03:04.680 --> 00:03:07.270
image would be a lot of anticipation


00:03:07.280 --> 00:03:11.270
about how far reaching the James web


00:03:11.280 --> 00:03:14.910
Space Telescope will be in um its


00:03:14.920 --> 00:03:18.390
capacity to provide Deep Field imagery


00:03:18.400 --> 00:03:22.589
from far far back in the uh universe and


00:03:22.599 --> 00:03:25.630
it has not disappointed Fred not at all


00:03:25.640 --> 00:03:28.190
that's right so um what what we're


00:03:28.200 --> 00:03:30.350
seeing and and I would guess most of our


00:03:30.360 --> 00:03:32.110
listeners will have seen this because I


00:03:32.120 --> 00:03:34.270
think it's going to be the cover picture


00:03:34.280 --> 00:03:38.350
on the on the podcast for today see uh


00:03:38.360 --> 00:03:41.949
really is a beautiful image of a cluster


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of galaxies uh which as always has a


00:03:45.159 --> 00:03:50.070
gobble de name it is smacs


00:03:50.080 --> 00:03:54.350
0723 um uh


00:03:54.360 --> 00:03:56.990
smac stands for streaming motions in


00:03:57.000 --> 00:04:00.869
Abel clusters okay uh and and Abel


00:04:00.879 --> 00:04:02.429
clusters are clusters that were


00:04:02.439 --> 00:04:04.350
cataloged by George Abel who I knew when


00:04:04.360 --> 00:04:06.630
he worked in Edinburgh for a while uh so


00:04:06.640 --> 00:04:09.309
cluster is a cluster of galaxies um but


00:04:09.319 --> 00:04:11.869
of course like so many of these giant


00:04:11.879 --> 00:04:14.309
clusters its mass acts as a


00:04:14.319 --> 00:04:17.270
gravitational lens uh magnifying and


00:04:17.280 --> 00:04:19.349
distorting the images of galaxies in the


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far distance behind it um and so this


00:04:22.800 --> 00:04:26.310
particular cluster um shows up uh


00:04:26.320 --> 00:04:29.230
beautifully in you know the the kind of


00:04:29.240 --> 00:04:31.150
colors that you would expect so as you


00:04:31.160 --> 00:04:32.950
know the James web telescope is an


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infrared telescope excuse me so uh it


00:04:36.320 --> 00:04:38.230
can look at the image in various


00:04:38.240 --> 00:04:41.469
infrared wave bands and what you can do


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is sort of equate those to visible light


00:04:43.919 --> 00:04:47.950
wave bands so that things uh that uh are


00:04:47.960 --> 00:04:50.510
in the far infrared show up as red in


00:04:50.520 --> 00:04:53.110
the visible uh things that are you know


00:04:53.120 --> 00:04:56.029
in the mid infrared show up as as as


00:04:56.039 --> 00:04:58.430
white things that are in the near


00:04:58.440 --> 00:05:00.230
infrared in other words not much reder


00:05:00.240 --> 00:05:01.629
than red they'll show up probably as


00:05:01.639 --> 00:05:03.790
blue I'm not quite sure how they did the


00:05:03.800 --> 00:05:05.270
color balancing in this image but


00:05:05.280 --> 00:05:06.830
they've got it absolutely right because


00:05:06.840 --> 00:05:09.670
the nearby stars are blue um the


00:05:09.680 --> 00:05:11.990
relatively nearby cluster of galaxies is


00:05:12.000 --> 00:05:14.310
white and the distant ones as you might


00:05:14.320 --> 00:05:15.870
expect it because they're highly red


00:05:15.880 --> 00:05:19.070
shifted they look orange in color um and


00:05:19.080 --> 00:05:21.150
again distorted so we're looking back


00:05:21.160 --> 00:05:25.670
here um you know uh it will be well the


00:05:25.680 --> 00:05:28.029
the nearby cluster is 4.6 billion light


00:05:28.039 --> 00:05:30.710
years away uh the one Beyond it could be


00:05:30.720 --> 00:05:32.469
double that um I haven't seen the


00:05:32.479 --> 00:05:34.749
results of that but it's it's a long way


00:05:34.759 --> 00:05:38.590
off uh and what I think is most telling


00:05:38.600 --> 00:05:41.390
about this image so this is um being


00:05:41.400 --> 00:05:44.830
called web's first Deep Field image um


00:05:44.840 --> 00:05:46.790
and you probably remember because we've


00:05:46.800 --> 00:05:48.950
talked about it before the Hubble


00:05:48.960 --> 00:05:50.830
telescope produced a number of Deep


00:05:50.840 --> 00:05:53.790
Field images deep being how how far into


00:05:53.800 --> 00:05:55.950
the universe you're looking how far into


00:05:55.960 --> 00:05:58.909
the past you're looking um and there was


00:05:58.919 --> 00:06:02.189
the the the Deep Field the Hubble I


00:06:02.199 --> 00:06:04.189
can't remember what the the ultra Deep


00:06:04.199 --> 00:06:05.510
Field I think was the last one there


00:06:05.520 --> 00:06:08.469
were a number in between as well um but


00:06:08.479 --> 00:06:11.350
they took weeks of time on the Hubble


00:06:11.360 --> 00:06:14.950
Space Telescope to build up the imagery


00:06:14.960 --> 00:06:16.830
I remember the first one they they chose


00:06:16.840 --> 00:06:18.350
the part of Sky because there was


00:06:18.360 --> 00:06:21.029
nothing visible in it and so then they


00:06:21.039 --> 00:06:23.830
they observed it for for several nights


00:06:23.840 --> 00:06:26.270
or several days um because it doesn't


00:06:26.280 --> 00:06:29.110
matter in a Space Telescope um and


00:06:29.120 --> 00:06:32.070
finally got these deep Fields so but it


00:06:32.080 --> 00:06:35.749
took up to weeks to get them the James


00:06:35.759 --> 00:06:40.230
web first Deep Field was obtained in 12


00:06:40.240 --> 00:06:44.870
hours so that's telling you uh that you


00:06:44.880 --> 00:06:49.150
know we we now have a tool that can beat


00:06:49.160 --> 00:06:51.469
the pants off the Hubble Space Telescope


00:06:51.479 --> 00:06:54.270
and that is no small achievement and of


00:06:54.280 --> 00:06:55.710
course that comes about because it's a


00:06:55.720 --> 00:06:59.950
much bigger telescope uh the Hubble Is


00:06:59.960 --> 00:07:04.029
2.3 meter telescope uh this is a 6.5


00:07:04.039 --> 00:07:05.390
meter


00:07:05.400 --> 00:07:08.309
telescope yeah it's uh and and and


00:07:08.319 --> 00:07:11.350
that's really part of the reason why


00:07:11.360 --> 00:07:14.430
people have become so um excited in


00:07:14.440 --> 00:07:16.589
anticipation of what it is capable of


00:07:16.599 --> 00:07:19.150
and it's uh it's already showing its


00:07:19.160 --> 00:07:22.350
true colors buom uh you know the part


00:07:22.360 --> 00:07:24.230
that really blew my mind when I looked


00:07:24.240 --> 00:07:25.790
at the image and read the description


00:07:25.800 --> 00:07:27.629
from NASA I'm sure you'll know what I'm


00:07:27.639 --> 00:07:30.589
talking about here uh Master says this


00:07:30.599 --> 00:07:32.350
image covers a patch of Sky


00:07:32.360 --> 00:07:34.309
approximately the size of a grain of


00:07:34.319 --> 00:07:37.150
sand held at arms length by someone on


00:07:37.160 --> 00:07:39.550
the ground that's right and reveals


00:07:39.560 --> 00:07:42.110
thousands of galaxies in a tiny sliver


00:07:42.120 --> 00:07:44.070
of vast


00:07:44.080 --> 00:07:47.390
space it I know we always talk about the


00:07:47.400 --> 00:07:49.830
vastness of the universe but here we are


00:07:49.840 --> 00:07:52.230
looking at a distance of maybe 4 to 8


00:07:52.240 --> 00:07:55.189
billion light years and we're looking at


00:07:55.199 --> 00:07:58.550
something that uh only takes up space


00:07:58.560 --> 00:08:00.350
the size of the grain of sand held it


00:08:00.360 --> 00:08:05.430
arms length I mean my word it just it it


00:08:05.440 --> 00:08:08.469
is or inspiring it really is yeah it


00:08:08.479 --> 00:08:10.230
blew the president away as well I don't


00:08:10.240 --> 00:08:12.749
know whether you saw the uh the NASA


00:08:12.759 --> 00:08:14.469
broadcast when this was released but


00:08:14.479 --> 00:08:17.230
President Biden uh you could tell he was


00:08:17.240 --> 00:08:19.629
absolutely captivated by all this it's


00:08:19.639 --> 00:08:24.070
fantastic to see uh such enthusiasm um


00:08:24.080 --> 00:08:26.189
and of course Andrew this is only the


00:08:26.199 --> 00:08:29.869
first of many by the time uh our listen


00:08:29.879 --> 00:08:32.230
are watching and listening to this if


00:08:32.240 --> 00:08:35.709
they watch on YouTube uh we expect uh


00:08:35.719 --> 00:08:38.509
another tranch of images to have been


00:08:38.519 --> 00:08:42.029
released um the kinds of things that


00:08:42.039 --> 00:08:43.589
we're expecting to see in fact I think


00:08:43.599 --> 00:08:46.550
we've got a fairly um a fairly good list


00:08:46.560 --> 00:08:49.310
here uh we'll see wasp


00:08:49.320 --> 00:08:52.590
96b now that is a planet that's an extra


00:08:52.600 --> 00:08:55.430
Solar Planet wasp 96b so it's going to


00:08:55.440 --> 00:08:58.030
be really interesting to see uh how that


00:08:58.040 --> 00:09:00.030
shows up we're going to see the southern


00:09:00.040 --> 00:09:02.590
Ring Nebula uh that's a planetary nebula


00:09:02.600 --> 00:09:04.710
we'll see no doubt a lot of detail in


00:09:04.720 --> 00:09:06.509
that we're going to see a cluster of


00:09:06.519 --> 00:09:09.470
galaxies a very compact uh cluster of


00:09:09.480 --> 00:09:11.870
galaxies called Stefan's quintet very


00:09:11.880 --> 00:09:14.910
well-known very beloved of Galactic uh


00:09:14.920 --> 00:09:16.310
astronomers or extra Galactic


00:09:16.320 --> 00:09:18.069
astronomers people who study the The


00:09:18.079 --> 00:09:20.110
Wider Universe these galaxies are


00:09:20.120 --> 00:09:21.670
physically close together and all


00:09:21.680 --> 00:09:23.829
interacting with one another and of


00:09:23.839 --> 00:09:26.350
course uh an object in our deep southern


00:09:26.360 --> 00:09:28.430
Sky the Karina nebula the EA Karina


00:09:28.440 --> 00:09:31.150
nebula one of the most active regions uh


00:09:31.160 --> 00:09:33.790
of space in our local neighborhood so it


00:09:33.800 --> 00:09:35.230
be really interesting to see what's


00:09:35.240 --> 00:09:38.269
going on in that too yes yes and and who


00:09:38.279 --> 00:09:41.630
knows we we might actually be focusing


00:09:41.640 --> 00:09:44.870
our cameras on alien civilizations out


00:09:44.880 --> 00:09:46.509
there somewhere and we don't even know


00:09:46.519 --> 00:09:48.829
it we don't that Dove Tales beautifully


00:09:48.839 --> 00:09:52.870
into our next story so all I'll say just


00:09:52.880 --> 00:09:54.670
to finish up with the James wor Space


00:09:54.680 --> 00:09:57.470
Telescope is watch this space as we as


00:09:57.480 --> 00:09:59.470
we've said uh because there's some


00:09:59.480 --> 00:10:02.790
exciting things to come it's uh really I


00:10:02.800 --> 00:10:04.350
I think it's fantastic that they've done


00:10:04.360 --> 00:10:06.470
so well that it got in place yes it's


00:10:06.480 --> 00:10:07.710
had a couple of problems that they've


00:10:07.720 --> 00:10:10.470
managed to overcome without any adverse


00:10:10.480 --> 00:10:13.670
effect and now it's ready to do its job


00:10:13.680 --> 00:10:15.670
and uh yeah who knows what we're going


00:10:15.680 --> 00:10:18.990
to learn Fred who knows absolutely


00:10:19.000 --> 00:10:21.990
fabulous stuff you're listening to and


00:10:22.000 --> 00:10:24.190
in some places watching Space Nuts with


00:10:24.200 --> 00:10:29.949
Andrew Dunley and Professor Fred Watson


00:10:29.959 --> 00:10:32.870
and I feel fine Space Nuts uh now we'll


00:10:32.880 --> 00:10:37.069
go to uh Alex who's from a lovely uh


00:10:37.079 --> 00:10:38.990
it's it's actually a sorted nasty


00:10:39.000 --> 00:10:42.110
horrible little place called bellingen


00:10:42.120 --> 00:10:45.430
and you said come on in New South Wales


00:10:45.440 --> 00:10:47.269
it's actually a a glorious part of the


00:10:47.279 --> 00:10:50.829
world it's still yeah yeah Alex is


00:10:50.839 --> 00:10:52.509
asking about galaxies this is really


00:10:52.519 --> 00:10:55.350
good too hi Fred and Andrew it's Alex


00:10:55.360 --> 00:10:57.550
from bellingen congratulations on your


00:10:57.560 --> 00:11:00.910
300 shows May the be many more okay


00:11:00.920 --> 00:11:03.269
straight into my question it's about the


00:11:03.279 --> 00:11:06.550
apparent size of galaxies it's common


00:11:06.560 --> 00:11:07.949
understanding that the further away an


00:11:07.959 --> 00:11:10.030
object is the smaller it appears to our


00:11:10.040 --> 00:11:12.670
eyes I guess you could say the object's


00:11:12.680 --> 00:11:15.710
angular size reduces with distance just


00:11:15.720 --> 00:11:17.710
look down a long straight road lined


00:11:17.720 --> 00:11:20.310
with power poles and the poles appear


00:11:20.320 --> 00:11:22.870
smaller the further away they are but


00:11:22.880 --> 00:11:24.629
I've heard this seemingly obvious


00:11:24.639 --> 00:11:26.590
relationship between distance and


00:11:26.600 --> 00:11:30.190
apparent size does not apply to Galaxy


00:11:30.200 --> 00:11:32.389
well it does to a point but at some


00:11:32.399 --> 00:11:34.590
distance away from us the apparent size


00:11:34.600 --> 00:11:37.350
of galaxies stops getting smaller and


00:11:37.360 --> 00:11:39.710
then begins to increase the further from


00:11:39.720 --> 00:11:42.750
us they are have I heard that right and


00:11:42.760 --> 00:11:45.750
if so how the heck does that work thanks


00:11:45.760 --> 00:11:47.430
and keep up the good work it's all the


00:11:47.440 --> 00:11:50.509
best oh boy you tell us Alex um that


00:11:50.519 --> 00:11:53.670
sounds bizarre Fred it does doesn't it


00:11:53.680 --> 00:11:56.430
it's an extraordinary thing but it is


00:11:56.440 --> 00:12:00.190
actually true um and


00:12:00.200 --> 00:12:02.829
it's it's a real


00:12:02.839 --> 00:12:07.389
illustration of the fact that um we live


00:12:07.399 --> 00:12:11.470
in a universe that has peculiar


00:12:11.480 --> 00:12:16.389
properties uh and it's basically uh the


00:12:16.399 --> 00:12:18.269
fact that we live in an expanding


00:12:18.279 --> 00:12:20.750
universe that causes this phenomenon to


00:12:20.760 --> 00:12:24.509
happen uh because uh if you go through


00:12:24.519 --> 00:12:26.590
the mathematics and actually there's


00:12:26.600 --> 00:12:27.829
There Are Places on the web where you


00:12:27.839 --> 00:12:29.829
can find some nice diagrams that show


00:12:29.839 --> 00:12:33.430
how this works uh the the further away


00:12:33.440 --> 00:12:36.790
you look um you get to a certain point


00:12:36.800 --> 00:12:38.629
Beyond which things don't look any


00:12:38.639 --> 00:12:42.750
smaller uh because uh you're you because


00:12:42.760 --> 00:12:45.430
the universe is expanding that's the the


00:12:45.440 --> 00:12:48.829
best way to put it um


00:12:48.839 --> 00:12:53.069
so so if you imagine


00:12:53.079 --> 00:12:55.670
um think about you know our and


00:12:55.680 --> 00:12:58.550
Andromeda galaxy our nearest neighbor


00:12:58.560 --> 00:13:01.870
which is alog together something like 2°


00:13:01.880 --> 00:13:05.030
on the sky uh at its distance of about 2


00:13:05.040 --> 00:13:08.949
and a half million light years away so


00:13:08.959 --> 00:13:12.030
if you started uh you we we envisage


00:13:12.040 --> 00:13:13.949
Andromeda we know what it's like we've


00:13:13.959 --> 00:13:16.590
all seen pictures of the androma Galaxy


00:13:16.600 --> 00:13:19.629
uh beautiful uh elongated spiral because


00:13:19.639 --> 00:13:22.790
it's tilted over towards us um 2 and a


00:13:22.800 --> 00:13:25.990
half million light years away if you


00:13:26.000 --> 00:13:28.150
took that Galaxy further and further


00:13:28.160 --> 00:13:29.710
away of course


00:13:29.720 --> 00:13:31.990
it would start looking smaller and


00:13:32.000 --> 00:13:33.550
smaller because it's getting further


00:13:33.560 --> 00:13:36.269
away the laws of physics work pretty


00:13:36.279 --> 00:13:39.389
normally over small distances but once


00:13:39.399 --> 00:13:45.990
she gets to uh a distance which is uh


00:13:46.000 --> 00:13:49.470
actually it it's the distance varies


00:13:49.480 --> 00:13:51.629
because you it depends on your model of


00:13:51.639 --> 00:13:54.389
the universe uh but I can give you the


00:13:54.399 --> 00:13:56.230
technical answer it's at a red shift of


00:13:56.240 --> 00:13:57.230
about


00:13:57.240 --> 00:14:00.350
1.5 uh and that's sort of a distance


00:14:00.360 --> 00:14:02.350
that's measured in billions of light


00:14:02.360 --> 00:14:03.509
years we probably talking about


00:14:03.519 --> 00:14:05.430
something like eight or nine billion


00:14:05.440 --> 00:14:07.430
light years once it gets to that


00:14:07.440 --> 00:14:10.629
distance it hits a minimum size which is


00:14:10.639 --> 00:14:12.990
about a thousandth of a degree remember


00:14:13.000 --> 00:14:15.509
it's it's two degrees at its present


00:14:15.519 --> 00:14:17.230
distance but it gets down to this


00:14:17.240 --> 00:14:21.230
1,000th of a degree Mark and and even


00:14:21.240 --> 00:14:23.110
though then you know keep on moving it


00:14:23.120 --> 00:14:26.189
away it doesn't actually get any smaller


00:14:26.199 --> 00:14:28.150
in fact it starts getting a bit bigger


00:14:28.160 --> 00:14:30.710
and that is totally bizarre but it's


00:14:30.720 --> 00:14:33.269
just about the way light behaves in an


00:14:33.279 --> 00:14:34.430
expanding


00:14:34.440 --> 00:14:37.430
Universe wow and and is this something


00:14:37.440 --> 00:14:39.990
that would be able to be demonstrated by


00:14:40.000 --> 00:14:42.749
the James web space exactly so I think


00:14:42.759 --> 00:14:45.470
we'll see you know we'll see physical


00:14:45.480 --> 00:14:47.310
proof of this happening with the gen's


00:14:47.320 --> 00:14:49.509
web Space Telescope when they they find


00:14:49.519 --> 00:14:51.350
that there are galaxies that don't seem


00:14:51.360 --> 00:14:53.069
to get any smaller even though you


00:14:53.079 --> 00:14:55.350
looking at them further and further away


00:14:55.360 --> 00:14:56.389
quite


00:14:56.399 --> 00:14:59.590
incredible that's um the same effect


00:14:59.600 --> 00:15:01.550
I have when I hit a golf ball it doesn't


00:15:01.560 --> 00:15:04.509
get smaller or smaller it stays about


00:15:04.519 --> 00:15:08.189
the same size yes suggests I'm not


00:15:08.199 --> 00:15:10.110
really hitting it very far at


00:15:10.120 --> 00:15:13.590
all never mind if you hit it it start


00:15:13.600 --> 00:15:14.629
getting


00:15:14.639 --> 00:15:18.670
bigger it's coming back to you yes


00:15:18.680 --> 00:15:20.870
absolutely uh thanks Alex and hope all


00:15:20.880 --> 00:15:22.670
is well in Belling I know you've been


00:15:22.680 --> 00:15:25.389
getting rained upon by cats and dogs and


00:15:25.399 --> 00:15:27.110
camels and who knows what else in recent


00:15:27.120 --> 00:15:28.670
times so hopefully it'll start to dry


00:15:28.680 --> 00:15:29.340
out


00:15:29.350 --> 00:15:31.110
[Music]


00:15:31.120 --> 00:15:34.350
soon Space Nuts hello again space


00:15:34.360 --> 00:15:36.350
Nutters this is Anna from astronomy


00:15:36.360 --> 00:15:38.590
daily the podcast stopping by again with


00:15:38.600 --> 00:15:40.230
a couple of the important stories we've


00:15:40.240 --> 00:15:42.790
been following over the past week


00:15:42.800 --> 00:15:44.430
astronomers may have finally cracked a


00:15:44.440 --> 00:15:46.509
longstanding cosmic mystery about one of


00:15:46.519 --> 00:15:49.030
our Galaxy's most intriguing features


00:15:49.040 --> 00:15:52.350
the gd1 Stellar stream this ribbon-like


00:15:52.360 --> 00:15:54.150
structure of stars which stretches


00:15:54.160 --> 00:15:56.590
across our Galaxy's Halo has puzzled


00:15:56.600 --> 00:15:58.550
scientists for years due to its unusual


00:15:58.560 --> 00:16:00.990
pattern of gaps and Spurs that seem to


00:16:01.000 --> 00:16:02.590
defy conventional


00:16:02.600 --> 00:16:04.870
explanations a team led by researchers


00:16:04.880 --> 00:16:06.309
at the University of California


00:16:06.319 --> 00:16:08.470
Riverside has proposed an exciting


00:16:08.480 --> 00:16:10.710
solution involving dark matter but not


00:16:10.720 --> 00:16:12.910
just any dark matter their research


00:16:12.920 --> 00:16:14.949
suggests these distinctive features were


00:16:14.959 --> 00:16:16.590
created by what's called a


00:16:16.600 --> 00:16:19.509
self-interacting dark matter sub Halo a


00:16:19.519 --> 00:16:21.389
dense concentration of dark matter that


00:16:21.399 --> 00:16:23.470
behaves differently than the traditional


00:16:23.480 --> 00:16:25.230
cold Dark Matter model we're familiar


00:16:25.240 --> 00:16:27.430
with what makes this discovery


00:16:27.440 --> 00:16:29.710
particularly fascinating is that the


00:16:29.720 --> 00:16:31.990
density needed to create these unusual


00:16:32.000 --> 00:16:35.350
patterns in gd1 is much higher than what


00:16:35.360 --> 00:16:37.150
we'd expect from conventional Dark


00:16:37.160 --> 00:16:39.509
Matter theories the research team found


00:16:39.519 --> 00:16:41.430
that only a collapsing subh of


00:16:41.440 --> 00:16:43.550
self-interacting Dark Matter could


00:16:43.560 --> 00:16:45.790
achieve the necessary density to produce


00:16:45.800 --> 00:16:48.629
these distinctive features we observe


00:16:48.639 --> 00:16:50.269
this isn't just about solving one


00:16:50.279 --> 00:16:52.990
mysterious structure in our galaxy if


00:16:53.000 --> 00:16:54.550
confirmed these findings could


00:16:54.560 --> 00:16:56.269
fundamentally change our understanding


00:16:56.279 --> 00:16:59.189
of Dark Matter itself remember Dark


00:16:59.199 --> 00:17:01.949
Matter makes up about 85% of all matter


00:17:01.959 --> 00:17:04.029
in the universe yet we still know


00:17:04.039 --> 00:17:06.710
remarkably little about its true nature


00:17:06.720 --> 00:17:08.710
This research suggests that dark matter


00:17:08.720 --> 00:17:10.429
particles might interact with each other


00:17:10.439 --> 00:17:12.870
through a new kind of force rather than


00:17:12.880 --> 00:17:14.590
being completely invisible to one


00:17:14.600 --> 00:17:17.270
another as previously thought the team


00:17:17.280 --> 00:17:19.270
used sophisticated computer simulations


00:17:19.280 --> 00:17:21.270
to model how this self-interacting dark


00:17:21.280 --> 00:17:23.390
matter would behave and the results


00:17:23.400 --> 00:17:25.110
matched perfectly with the observed


00:17:25.120 --> 00:17:28.189
features in the gd1 Stream it's like


00:17:28.199 --> 00:17:30.029
finding the piece of a puzzle that's


00:17:30.039 --> 00:17:32.190
been sitting on the table for years


00:17:32.200 --> 00:17:34.110
suddenly revealing a whole new picture


00:17:34.120 --> 00:17:36.909
of how our galaxy Works what's


00:17:36.919 --> 00:17:38.390
particularly exciting about this


00:17:38.400 --> 00:17:40.789
discovery is that it opens up new ways


00:17:40.799 --> 00:17:43.549
to study dark matter by looking at


00:17:43.559 --> 00:17:45.870
Stellar streams like gd1 we might be


00:17:45.880 --> 00:17:47.789
able to better understand not just where


00:17:47.799 --> 00:17:50.190
dark matter is but how it behaves and


00:17:50.200 --> 00:17:52.669
interacts with itself something that


00:17:52.679 --> 00:17:54.590
could revolutionize our understanding of


00:17:54.600 --> 00:17:56.990
the universe's fundamental


00:17:57.000 --> 00:17:59.669
structure next a little mystery from


00:17:59.679 --> 00:18:01.750
China that has set the space Community


00:18:01.760 --> 00:18:04.070
buzzing in a remarkable display of


00:18:04.080 --> 00:18:06.270
technological advancement China's space


00:18:06.280 --> 00:18:08.350
program has taken a significant Leap


00:18:08.360 --> 00:18:10.669
Forward conducting tests of five


00:18:10.679 --> 00:18:12.710
different rocket engines all in a single


00:18:12.720 --> 00:18:14.909
day the China Aerospace Science and


00:18:14.919 --> 00:18:17.390
Technology Corporation or Cass C carried


00:18:17.400 --> 00:18:18.990
out these tests at two separate


00:18:19.000 --> 00:18:21.470
locations Beijing and lwan county in


00:18:21.480 --> 00:18:24.390
heay Province one of the most notable


00:18:24.400 --> 00:18:26.630
tests involved a new hydrogen oxygen


00:18:26.640 --> 00:18:29.350
engine designed for upper stage Rockets


00:18:29.360 --> 00:18:31.630
during its 100 second test firing


00:18:31.640 --> 00:18:33.470
Engineers gathered crucial performance


00:18:33.480 --> 00:18:35.430
data that could pave the way for future


00:18:35.440 --> 00:18:37.750
missions this wasn't just any routine


00:18:37.760 --> 00:18:40.430
test it's believed to be connected to


00:18:40.440 --> 00:18:42.350
China's ambitious plans for crude lunar


00:18:42.360 --> 00:18:44.590
missions specifically their Long March


00:18:44.600 --> 00:18:47.070
10th launcher program but that's not all


00:18:47.080 --> 00:18:49.789
that was tested that day in Beijing


00:18:49.799 --> 00:18:51.630
Engineers put three different engines


00:18:51.640 --> 00:18:54.270
through their Paces a main engine an


00:18:54.280 --> 00:18:56.470
upper stage engine and a reaction and


00:18:56.480 --> 00:18:58.750
Orbit Control engine while spefic


00:18:58.760 --> 00:19:00.310
specific details about which Rockets


00:19:00.320 --> 00:19:02.430
these engines are destined for remain


00:19:02.440 --> 00:19:04.630
Under Wraps it's clear that China is


00:19:04.640 --> 00:19:07.549
developing multiple launch capabilities


00:19:07.559 --> 00:19:10.230
simultaneously perhaps most intriguingly


00:19:10.240 --> 00:19:12.190
the testing day included a methane


00:19:12.200 --> 00:19:14.750
liquid oxygen engine at the lwan


00:19:14.760 --> 00:19:17.149
facility this type of engine represents


00:19:17.159 --> 00:19:19.390
The Cutting Edge of Rocket technology


00:19:19.400 --> 00:19:21.110
with several Chinese companies already


00:19:21.120 --> 00:19:23.630
developing similar systems it's worth


00:19:23.640 --> 00:19:25.310
noting that Cassie is working on a


00:19:25.320 --> 00:19:27.669
particularly powerful version for their


00:19:27.679 --> 00:19:30.789
Long March 9th Mega rocket project these


00:19:30.799 --> 00:19:32.669
tests signal China's commitment to


00:19:32.679 --> 00:19:34.630
developing a diverse range of Rocket


00:19:34.640 --> 00:19:37.149
Technologies from deep space exploration


00:19:37.159 --> 00:19:39.870
vehicles to heavy lift Rockets according


00:19:39.880 --> 00:19:41.710
to KSC Engineers this is just the


00:19:41.720 --> 00:19:43.590
beginning they're planning to conduct


00:19:43.600 --> 00:19:45.190
even more research and testing of


00:19:45.200 --> 00:19:47.110
various engine types for China's major


00:19:47.120 --> 00:19:49.390
space projects suggesting we might see


00:19:49.400 --> 00:19:51.430
several new Chinese Rockets debut in the


00:19:51.440 --> 00:19:54.230
coming year this coordinated testing


00:19:54.240 --> 00:19:56.029
effort demonstrates China's growing


00:19:56.039 --> 00:19:58.350
capabilities in space technology and


00:19:58.360 --> 00:20:00.110
their determination to become a major


00:20:00.120 --> 00:20:02.870
player in space exploration with these


00:20:02.880 --> 00:20:04.430
successful tests they're laying the


00:20:04.440 --> 00:20:06.510
groundwork for increasingly ambitious


00:20:06.520 --> 00:20:09.029
missions from lunar exploration to


00:20:09.039 --> 00:20:11.669
potential Mars voyages and that's it


00:20:11.679 --> 00:20:14.070
from me for this episode of Space Nuts


00:20:14.080 --> 00:20:16.470
I'm Anna don't forget to visit astronomy


00:20:16.480 --> 00:20:18.990
daily. for your daily fix of space and


00:20:19.000 --> 00:20:21.470
astronomy news updates we're constantly


00:20:21.480 --> 00:20:23.190
updating the site with the latest


00:20:23.200 --> 00:20:25.190
discoveries Mission updates and Cosmic


00:20:25.200 --> 00:20:27.390
wonders until our next adventure through


00:20:27.400 --> 00:20:29.669
the cosmos keep looking up and stay


00:20:29.679 --> 00:20:30.990
curious about the Mysteries that


00:20:31.000 --> 00:20:33.830
surround us in space Space Nuts you'll


00:20:33.840 --> 00:20:36.950
be listening to the Space Nuts


00:20:36.960 --> 00:20:40.029
podcast available at Apple podcasts


00:20:40.039 --> 00:20:42.990
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00:20:43.000 --> 00:20:45.270
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demand at bites.com this has been


00:20:48.000 --> 00:20:50.390
another quality podcast production from


00:20:50.400 --> 00:20:53.200
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