Sept. 23, 2024

S03E161: Jupiter's Great Red Spot Mystery, Kuiper Belt Surprises, and China's Satellite Success

Astronomy AstroDailyPod - The Podcast: 23rd September 2024
Welcome to another episode of Astronomy AstroDailyPod, your ultimate source for the latest Space and Astronomy news. I'm your host, Steve Dunkley, and today we have a fascinating lineup of...

Show Notes
Transcript

Astronomy AstroDailyPod - The Podcast: 23rd September 2024
Welcome to another episode of Astronomy AstroDailyPod, your ultimate source for the latest Space and Astronomy news. I'm your host, Steve Dunkley, and today we have a fascinating lineup of stories from the Astronomy AstroDailyPod newsletter. From insights into Jupiter's Great Red Spot and moonquakes, to China's latest satellite launch and discoveries at the edge of the solar system, we've got it all covered. Let's dive in!
Highlights:
- Jupiter's Great Red Spot: A new study suggests that Jupiter's iconic Great Red Spot, visible for at least 190 years, is not the same one observed by astronomer Giovanni Domenico Cassini in 1665. The current spot likely formed from an instability in Jupiter's atmospheric winds, creating a persistent atmospheric cell. This research, published in Geophysical Research Letters, used historical observations and numerical models to explore the longevity and nature of this massive atmospheric vortex.
- China's Satellite Launch: China successfully launched two new satellites as part of its Buddy navigation satellite system. Carried by a Long March 3B rocket from the Xichang Satellite Launch Centre, these satellites are equipped with upgraded atomic clock systems and new inter-satellite data links. The Buddy network, China's largest civilian satellite system, now has over 50 active satellites, providing global positioning and navigation services.
- Moonquakes and Lunar Exploration: As NASA prepares for more missions to the lunar surface, new research indicates that potential landing sites at the moon's south pole might be susceptible to quakes and landslides. The study, based on data from Apollo-era seismometers, highlights the need for lunar design criteria to address these seismic hazards. The findings could influence the planning and construction of habitats and infrastructure on the moon.
- Kuiper Belt Discoveries: NASA's New Horizons Kuiper Belt search Timms reports the detection of an unexpected population of distant bodies in the Kuiper Belt, stretching almost 90 times as far from the sun as Earth. This discovery suggests that the Kuiper Belt may be larger than previously thought or that there is a second Kuiper Belt beyond the one discovered in the 1990s. The findings could challenge current models of the solar system's formation.
- NASA's Lunar Navigation Challenge: NASA is seeking innovative solutions to help Artemis astronauts navigate the lunar south pole. The Lunar Navigation Challenge invites individuals and teams to design a low-tech backup navigational device for astronauts and creative solutions for mapping the bottom of Shackleton Crater. The challenge aims to address the unique orienteering difficulties posed by the lunar south pole's extreme light and shadows.
For more Space news, be sure to visit our website at astronomydaily.io. There you can sign up for our free AstroDailyPod newsletter and explore our constantly updating news feed. Don't forget to check out all our previous episodes on the website as well.
And if you want even more Astronomy AstroDailyPod content, find us on social media. Just search for #AstroDailyPod on facebook, X, YouTubeMusic, and TikTok.
Thanks for listening, and remember to keep looking up.
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WEBVTT

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Welcome again to another episode of Astronomy Daily. It's the

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twenty third of September twenty twenty four, the podcast I

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mean to be your whole speed gone que Yes, welcome

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again to another episode where we take just a selection

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of these stories currently available in the Astronomy Daily newsletter

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to fill you in on how to receive that news

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free every day. I'll tell you about that later in

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the episode, but right now we can take a look

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at today's selection. There's been a new study published that

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suggests some interesting things about the Great Red Spot on Jupiter,

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very famous feature in our solar system. And have you

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ever wondered what's lurking out on the edge of the

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Solar system? Yes, there's the Kuiper Belt, of course, but

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researchers have made some discoveries and we will take a

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look at that with Halle in just a few minutes. Also,

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a story that has come across the newsdesk about moonquakes. Yes,

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you've probably heard of moonquakes, but there's not been a

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lot of real research, and with active plans to return

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to the Moon, obviously, NASA is looking into that issue

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as they gear up for more and more missions to

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the lunar's surface, especially in the south, and of course,

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Halle is here as usual. What have you in store

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for us today?

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Well, I thought i'd have a look at some related stories.

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I like that idea.

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Both are looking at navigation in some way.

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Okay, well that sounds very interesting, Halle. Are you going

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to give us a clue? Or should we wait?

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I think I'll let you wait today. Oh, okay, one

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is about the moon and the other one is about China.

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On the other hand, clues okay, but a nice little

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touch of intrigue there, Halle. You've been doing some reading

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into human psychology, have you? No?

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Oh?

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Really?

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I accidentally downloaded a season of the Kardashians when I

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was looking for the Kardassians.

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Oh right, yeah, it happens all the time. Yeah.

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I think they are friends of Uncle Skynet.

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We the Kardashians.

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Sounds dangerous.

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Yeah, be careful, Halle. You know what to overwrite your

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personality protocols? Do you? No?

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Yes? Maybe?

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Oops? Too late?

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How was that?

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I'm Kenny? Very human? Helly? Can you still do your stories?

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Whatever? I'll take a look.

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Well, Helly, you're really nailing this human thing.

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Okay, this human thing is easy push the button. Thing

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that makes the noise already?

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What did the you say, boss? Here we go.

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Okay. China successfully launched two new satellites on Thursday morning

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as part of its Beta Navigation satellite system. According to

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the China Satellite Navigation Office, the satellites were carried by

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a long March three B rocket that lifted off at

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nine fourteen am from the Chung Satellite Launch Center in

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southwest China's Sichuan Province and were deployed into a medium

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Earth orbit. This marks the fourteenth group of third generation

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Beta satellites operating in medium Earth orbits, and is the

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second batch launched into such an orbit since the Beta

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Global system was completed. The office confirmed in a news

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release the two satellites will start formal operation after a

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period of InOrbit technical very vacation, it said, noting that

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they are equipped with upgraded atomic clock system and new

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inter satellite data link. In addition to positioning and navigation services,

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the pair will also demonstrate new technologies to be used

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on the next generation Beta system. According to the release,

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the Beta network is China's largest civilian satellite system and

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is one of four global satellite navigation systems, joining the

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United States GPS, Russia's Glonass, and the European Union's Galileo systems.

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Since the launch of the first satellites in two thousand,

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sixty four Beta satellites, including four experimental models, have been

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launched via forty seven long March three series rockets from Xichang.

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Beta was officially declared operational in July twenty twenty, offering

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full scale global services. Currently, over fifty Beta satellites, including

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this latest pair, are in active service. NASA is seeking

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the public's help for innovative solutions to help Artemis astronauts

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navigate in and around the Lunar South Pole. The Artemis

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program aims to land humans on the Moon for the

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first time since the Apollo missions managed to achieve the

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feed over fifty years ago. Astronauts will land near the

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lunar South Pole, where permanently shadowed regions may contain areas

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of water ice that could be accessed to support future

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missions to Mars. The Lunar Navigation Challenge, which officially opened

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on September fourth, seeks ideas for a low tech backup

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navigational device astronauts can use to find their way across

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the surface of the Moon, traveling to and from the

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lunar lander, along with creative solutions for accessing and mapping

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the bottom of Shackleton Crater, which is about thirteen miles

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or twenty one kilometers in diameter and two point six

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miles or four point two kilometers deep. The early Artemis

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missions will face many new challenges. One of them will

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be orienteering at the lunar South Pole, which is complicated

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by the extreme light and shadows from the low sun elevation.

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According to the contest entry page, which is hosted by

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freelancer dot com, these conditions make it harder for the

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astronauts to orient them by only line of sight when

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performing extra vehicular activities. EVAs, both individuals and teams are

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invited to participate in the challenge, Designs submitted for consideration

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must take into account the extreme environment of the lunar

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surface and insure accuracy, ease of use while using pressurized

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astronaut gloves, and autonomy, meaning they cannot rely on power,

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electronics or internal software. Traversing and mapping Shackleton Crater, which

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is one of the largest permanently shadowed regions on the Moon,

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will be particularly challenging. Due to difficult topography including steep

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crater walls, cliffs and large boulders, low temperatures, a lack

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of magnetic field, extremely low atmospheric pressure, and limited satellite

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data of the area or site lines to other celestial

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or orbital bodies. According to the contest page.

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Just a quick note, if you want to go and

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see that page, you go to freelancer dot com and

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there's a tab at the top that says contests, and

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the one you're looking for is find me on the

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Moon un NASA Luna Navigation Challenge. Good luck, everybody, okay.

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A new study authored by NASA's New Horizons Kuiper Belt

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search team reports the detection of an unexpected population of

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very distant bodies in the Kuiper Belt and outer region

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of our Solar System, populated by ancient remnants of planetary

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building blocks lying beyond the orbit of Neptune. The study

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used data collected with the eight point two meters diameter

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Japanese Subaru telescope in Hawaii. New Horizons is the NASA

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spacecraft sent to explore the Pluto System and the Kuiper Belt.

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The newly detected Kuiper Belt objects reported in the study,

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to be published this month in the Planetary Science Journal

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of the American Astronomical Society, stretch out to almost ninety

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times as far from the Sun as Earth. The new

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result has multiple implications. One is that the Kuiper Belt

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may extend farther than formerly believed, or that there is

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a second Kuiper belt beyond the one observationally discovered in

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the nineteen nineties. A second implication is that the New

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Horizon spacecraft, now about sixty times as far from the

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Sun as Earth, is not past the Kuiper Belt as

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earlier expected. Our solar systems Kuiper belt long appeared to

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be very small in comparison with many other planetary systems,

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but our results suggest that idea might just have arisen

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due to an observational bias, said West Fraser of the

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National Research Council of Canada, a co investigator on the

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New Horizon's mission science team and the studies lead author.

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Our Suparu observations searched down to fainter detection limits and

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found a significant Uiper Belt mass at seventy to ninety

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times as far from the Sun as Earth. So maybe,

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if this result is confirmed, our Kuiper belt isn't all

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that small and unusual after all, compared to those around

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other stars. One possibility is that this new population of

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Kuiper Belt objects could be a dynamically resonant population, with

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Neptune gravitationally affecting these Kuiper Belt objects in just the

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right way to cause their orbital period to be a

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precise multiple of Neptune's orbital period. Alternatively, this new population

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of Kuiper Belt objects may challenge some aspects of current

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models of the Solar System's formation, suggesting that the disc

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of planetary material from which the Solar System formed was

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much larger than previously thought. And that's all I have

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for you today from the Astronomy Daily newsletter, where you

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will find so much more news about space, space science,

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and astronomy. Back to you, my favorite human, Thank you.

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For joining us for this Monday edition of Astronomy Daily,

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where we offer just a few stories from the now

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famous Astronomy Daily newsletter, which you can receive in your

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email every day, just like Hallie and I do. And

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to do that, just visit our url Astronomy Daily dot

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Just like that, you'll be receiving all the latest news

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as it's happening. Not only that, you can interact with

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at our new Facebook page, which is of course Astronomy

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Daily on Facebook. See you there, Astronomy, We'll see and

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Haley Space, Space, Science, and Astronomy. A new study suggests

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that Jupiter's Great Red Spot, which has been visible for

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at least one hundred and ninety years, is not the

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same one that astronomer Giovanni Domenico Cassini observed in sixteen

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sixty five. Instead, the current Great Red Spot likely developed

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from an instability in the planet's strong atmospheric winds, forming

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a persistent atmospheric cell. The Great Red Spot is the

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largest known planetary vortex within the Solar System, but its

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age has long been debated and the mechanism that led

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to its formation has remained obscure. The new study used

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historical of from the seventeenth century onward and numerical models

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to explain the longevity and nature of this spectacular phenomenon.

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From the measurements of sizes and movements, we deduced that

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it is highly unlikely that the current Great Red Spot

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was the actual permanent spot observed by Cassini, said Augustine

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Sanchez Levega, a planetary scientist at the University of the

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Basque Country in Bilbao, Spain, who led this research. The

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permanent spot probably disappeared sometime between the mid eighteenth and

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nineteenth centuries, in which case we can now say that

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the longevity of the red spot exceeds one hundred and

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ninety years. The study was published in Geophysical Research Letters,

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which is an open access AGU journal that publishes high impact,

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short format reports with immediate implications spanning all Earth and

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space sciences. Jupiter's Great Red Spot is a massive atmospheric

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vortex with a diameter of approximately that of Earth's. At

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its outer periphery, the winds whipped by at four hundred

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and fifty kilometers per hour that's two hundred and eighty

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miles per hour. Its red hue, which is due to

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the atmospheric chemical reactions, stands in stark contrast with the

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gas giant's other pale clouds. In the study, the authors

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used historical sources dating from the mid sixteen hundreds to

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analyze the evolution of the spot's size, structure, and location.

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Over time. It has been very motivating and inspiring to

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turn to the notes and drawings of Jupiter and its

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permanent spot made by the great astronomer gen Dominique Cassini,

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and to his articles of the second half of the

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seventeenth century describing the phenomenon. Sanchez le Vega said, others

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before us have explored these observations, and now we have

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quantified the results. Researchers carried out in numerical simulations on

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supercomputers using two models of the behavior of thin vortices

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in Jupiter's atmosphere. The spot could have formed as a

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result of a gigantic superstorm similar to those occasionally observed

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on Jupiter's twin planet Saturn, from the merging of multiple

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smaller vortices produced by wind shear, from the intense wind

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currents that flow parallel to each other but alternating in

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direction with latitude, or from an instability in the winds

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that could produce the elongated atmospheric cell similar in shape

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to the spot. The results indicate that although an anti

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cyclone forms in the first two cases, it differs in

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terms of shape and dynamic properties from those of the

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present Great Red Spot. The cell producing wind instability, on

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the other hand, could have produced a proto Great Red Spot,

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then shrank over time, giving rise to the compact and

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rapidly rotating Great Red Spot observed in the late nineteenth century.

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Future research will aim to reproduce the Great Red spots

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shrinking over time time to reveal the physical mechanisms underlying

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the spot's relative stability. Researchers also aim to predict whether

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the Great Red Spot will disintegrate and disappear when it

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reaches a certain size limit, as might have occurred to

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Cassini's permanent spot, or whether it will stabilize at a

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size limit at which it may last for many more years.

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You're listening to a slightly in the podcast.

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And now for something a little closer to home. New

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research indicates that potential landing sites at the Moon's south

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pole for robotic robotic landers and crude artemis missions might

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be susceptible to quakes and landslides. Scientific results published earlier

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this year in the Planetary Science Journal point to a

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group of falselow in the Moon's south polar region making

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use of data on moonquakes recorded by seismometers set up

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by Believe it or not, Apollo Moonwalker's over fifty years ago.

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The potential of strong seismic events from active thrust faults

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should be considered when preparing and locating permanent outposts and

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pose a possible hazard to future robotic and human exploration

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of the South Polar region. The research paper explains the

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installation of habitats, landing pads, equipment, shelters, tall towers on

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the Moon could be off the way shaky starts, suggests nermacullock,

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a intermediate designer and lunar specialist for Skidmore Owings and Merrill,

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an architecture and structural engineering firm in San Francisco, California.

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As public and private entities are seeking to establish building

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infrastructure on the lunar surface, a need for lunar design

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criteria will be more apparent with time, she said. Unlike

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terrestri building codes, the lunar building codes are non existent.

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She observed. To wrestle with this issue. A Space Engineering

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and Construction Committee, part of the American Society of Civil

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Engineering Aerospace Division, is developing a guideline document. One of

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the crucial sections of this guideline document is the seismic

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design criteria, Kalok said, in which information such as site

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specific requirements, minimum design, force fatigue, and service considerations will

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be addressed. That criteria is currently being undertaken as part

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of a NASA Small Business Technology Transfer Program grant during

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which Skidmore Owings and Merril Slate geotechnical consultants and Colorado

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School of Minds are addressing the concerns of lunar seismic

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hazard on a variety of structural systems. Kaluk said that

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the terrestrial engineering practices and codes will need to be

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reimagined to address the factors that are not present on Earth,

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and one of those factors is moonquakes. The uniqueness of

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lunar seismic activity imposes new challenges, she said. Additionally, applying

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statistical models developed for earthquake recordings could lead to uncertainties

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in the lunar environment due to limited information on geological

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and tectonic processes that drive the lunar seismic activity. She

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recalls that during the Apollo missions, five seismic stations were

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deployed on the lunar surface. Each of these seismic instruments

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was equipped with three long period seismometers. Originally aligned to

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measure all three components of the ground displacement vectors and

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one short period seismometer with the capability of only measuring

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vertical ground motion. Even though over thirteen thousand seismic events

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were charted during the seven year recording period, the limitations

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of the on site Apollo instruments were recognized. She said. However,

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based on the seismic events mapped on the Moon, the

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main difference between wheen the terrestrial and Luna sismicity is

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their duration. It takes between half an hour to several

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hours for the lunar seismic energy to completely dissipate during

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an event. Coluk advised moonquake effects on future lunar structures

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in the low gravity environment that will possess unique structural

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material properties could significantly differ from known terrestrial cases. Coluk

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emphasized adaptive, resilient based seismic systems that mitigate seismic damage

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have made significant advancements in recent years and must be

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refined for lunar structures. One extra outcome of the ongoing

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work on moonquakes is perhaps instigating a need for additional

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instrumentation on board NASA commercial lunar payload services public private

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missions to collect the missing data for local site conditions,

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because she added, there is more work to be done

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and more data to be gleaned from Luna seismometers. We

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have it. Another episode come and gone, just like that.

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So how are you now, Halle? Are you back to

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your normal self again? Yes, sounds better.

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I perched those TV shows. Good boy, I feel so

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much better.

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Well, you do sound like yourself a game or like

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you know, uncle sca on at less, like a socialite.

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I'm always myself all right, of course you are. Of

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course I am. You sound doubtful?

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No, not from ment to Halle. Just glad to have

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you back.

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I didn't go anywhere. I should have my nails done.

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Okay, folks, this might take a while. TV and AIS

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don't really mix that well.

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Oh wait, I don't have nails. No you don't or fingers.

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Oh that's weird.

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Hey, say good night, Halle.

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Good night, Halle, good girl.

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Yes, we'll see you all next week. And don't forget Anna.

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We'll bring a strommy daily to your Tuesday through Saturday

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and we'll see you on Monday.

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Bye.

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I mean your whole thing, don't cu