Rogue Worlds and Solar Power
This episode is brought to you by the support of Insta360 - the leaders and innovators in portable 360 Photography. And they have just released the all new UltraGo...the take anywhere camera. Get all the details by visiting store.insta360.com and use the promo code SPACETIME at checkout for our special listener offer.
In this episode of SpaceTime, we explore groundbreaking discoveries and developments in the realm of astrophysics and space exploration.Rogue Planets and Their Potential
A fascinating new study reveals that giant free-floating planets, known as rogue planets, may have the ability to form their own miniature planetary systems independently of a host star. Observations from the Webb Space Telescope have identified young rogue planets with masses between 5 to 10 times that of Jupiter. These dim objects, which emit primarily in the infrared spectrum, are believed to hold secrets about the formation of planetary systems. The findings indicate that disks of warm dust surrounding these planets could provide the necessary materials for planet formation, suggesting that such systems could exist even in the absence of stars.Europe's Space Rider Progresses
The European Space Agency's reusable Space Rider spacecraft has successfully completed a crucial test of its nose cone, marking another milestone in its development. This innovative spacecraft will allow ESA to conduct orbital missions and return scientific payloads to Earth. Designed to operate as an unmanned laboratory in low Earth orbit, Space Rider will support a variety of experiments and technology demonstrations, paving the way for Europe to enhance its capabilities in space exploration.Harvesting Solar Power from Space
Could space-based solar panels be the solution to our energy needs? Scientists are investigating two promising projects aimed at capturing solar energy in orbit. The Innovative Heliostat Swarm aims to create a network of mirrors that direct sunlight to a central receiver, converting it into electricity for transmission back to Earth. Meanwhile, the Mature Planar Array is closer to deployment but will only capture solar energy about 60% of the time. Despite current challenges in cost-effectiveness, these projects could lead to breakthroughs in sustainable energy.www.spacetimewithstuartgary.com
✍️ Episode References
Astrophysical Journal
https://iopscience.iop.org/journal/2041-8205
European Space Agency
https://www.esa.int/
Journal of Solar Energy
https://www.journals.elsevier.com/solar-energy
Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-space-astronomy--2458531/support.
The Astronomy, Space, Technology & Science News Podcast.
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This is Space Time, Series 28,
Episode 104, for broadcast on
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00:00:04,193 --> 00:00:09,235
the 29th of August, 2025. Coming
up on Space Time, claims that
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00:00:09,336 --> 00:00:12,258
giant free-floating planets may
form their own planetary
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00:00:12,336 --> 00:00:16,329
systems, Europe's Space Rider
spacecraft completes another key
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00:00:16,422 --> 00:00:20,547
test, and could we use
space-based solar panels to
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00:00:20,610 --> 00:00:25,079
power the Earth? All that and
more coming up on Space Time.
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Welcome to Space Time with
Stuart Gary.
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A new study has found that giant
free-floating so-called rogue
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planets have the potential to
form their own miniature
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planetary systems without the
need of a host star. The
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findings, reported on the
pre-press physics website
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archive.org, based on
observations from the Webb Space
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Telescope.
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Looking at young isolated
objects with masses of 5 to 10
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times that of Jupiter. These
objects are comparable to gas
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giants in their properties, but
are free-floating in space, not
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bound to any host star, as
Jupiter is to the Sun.
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Free-floating planets are
difficult to observe, because
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they're very dim and they
radiate mostly in the infrared.
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But they hold keys to important
questions about astrophysics.
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Current research suggests that
these may well be the lowest
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mass objects formed like stars
from the collapse of molecular
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gas and dust clouds. But in
contrast to stars, they don't
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accumulate enough mass to
trigger the core nuclear fusion
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process which makes stars shine.
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Now in theory, it's also
possible that some of these may
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have formed in a way comparable
to how planets form through the
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accumulation of material around
a star. But they were later
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ejected from their home system
through some sort of
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gravitational perturbation. To
work out what's going on,
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scientists observed eight of
these objects, all very young,
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in order to learn more about
their infancy.
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They used two instruments aboard
the Webb Space Telescope to
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obtain detailed infrared
spectroscopic observations of
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these objects over a period of
three months. Six of these
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objects have excess emissions in
the infrared caused by warm dust
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in their immediate vicinity.
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And that's important, because
that's a characteristic
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signature of disks, which are
often the birthplaces of
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planets. The observations also
showed emission lines for
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silicon grains in the disks.
That's a clear sign of dust
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growth and crystallization, and
typically the first steps in the
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formation of rocky planets.
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Now, silicon emissions have been
found for stars and brown dwarfs
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before, but this is the first
detection in a planetary mass
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object. One of the study's
authors, Alex Schultz from the
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University Of St. Andrews, says
the new findings built on
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previous work showing that disks
around free-floating planetary
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mass objects can last several
million years, which is plenty
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of time to form planets.
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Schultz says that taken
together, these studies show
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that objects with masses
comparable to those of gas
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giants have the potential to
form their own miniature
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planetary systems. And those
systems could be like our solar
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system, just scaled down by a
factor of 100 or more in size.
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These new discoveries show that
the building blocks needed for
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forming planets can be found
even around objects that are
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barely larger than Jupiter, and
drifting alone in the darkness
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of space. It means that the
formation of planetary systems
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is not exclusive to stars and
brown dwarves, but may also work
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around lonely starless worlds as
well.
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But whether or not such
planetary systems actually exist
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still remains to be seen. This
is Space Time. Still to come,
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the European Space Agency's
reusable StarRider spacecraft
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completes another key test, and
could we use space-based solar
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panels to power the Earth? All
that and more still to come on
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Space Time.
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The European Space Agency's
reusable Space Rider has just
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completed the latest phase of
its development campaign with a
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successful qualification test of
the vehicle's nose cone. The
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largest single component of the
spacecraft's thermal protection
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system. This latest mission
followed a successful
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qualification test of the
vehicle's body flaps back in
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February.
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Once operational, SpaceRider
will provide ESA with its first
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orbital return-to-Earth and
landing capability. The
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wedge-shaped lifting-body design
spacecraft will be launched
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aboard a Vega-C rocket into
low-Earth orbit and will be
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capable of carrying payloads of
up to 800 kilograms. Once in
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space, it'll operate as an
unmanned laboratory for periods
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of over two months.
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The payload bay is
environmentally controlled and
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provides services including 600
watts of power for experiments
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along with thermal, control,
data handling and telemetry
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capabilities. It'll then
re-enter Earth's atmosphere and
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land using parasails. Returning
their payloads to Eger engineers
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and scientists, and after
minimal refurbishment, should be
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ready for its next mission with
new payloads.
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ESA's Director of Space
Transportation, Daniel
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Neuenschwinger, says space-rider
missions will offer an array of
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orbital altitudes and
inclinations, enabling a variety
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of experiments in microgravity,
as well as technologies for
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Earth observation, science,
telecommunications and robotic
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exploration.
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It's a fact that today Europe
does not have this capacity.
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It is also a fact that if
corresponding decisions are
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taken at the end of the year,
Europe will have it tomorrow.
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And in fact, At ESA we had
already a technology
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demonstration of a re-entry on
Earth, which took place a few
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years ago with an experimental
vehicle called IXV. And based on
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this experience, which was
highly successful and launched
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by Vega by the way, we are now
developing SpaceRider. During
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low Earth orbit operation in
microgravity, the vehicle can
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turn, maneuver according to the
mission it has.
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And then at the moment in time
you start the re-entry on Earth
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in fact you have a dedicated
angle of attack you start to
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enter into the atmosphere and
this is what we call a lifting
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body meaning there are no no
plane type of structures it's
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just a body which has a certain
angle of attack enters into the
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upper part of the atmosphere at
high speed we call it hypersonic
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and then the speed is decreased
through the drag.
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And when it starts to become
subsonic you have lowered
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significantly the speed and once
you have reached a certain level
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you can deploy a parafoil and
once with the parafoil deployed
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you can have a precision landing
on the runway somewhere in
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Europe we do a call for
opportunities and we will have
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different flight opportunities
planned for example in
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microgravity research so if you
are coming from a university
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that's for sure an opportunity
like in material sciences or
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pharmaceutical field, biological
field at large scale.
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Second we will work on
commercial opportunities and
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here we have already quite good
exchanges again with the
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pharmaceutical industry and we
will look for further in orbit
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validation and demonstration of
technologies which have to be
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tested and qualified in space
before they go. On big and
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costly missions.
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That's ESA's Director of Space
Transportation, Daniel
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Neuenschwender, and that report
was on ESA TV.
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This is Space Time. Still to
come, could we use space-based
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solar panels to power the Earth?
And later in the Science Report,
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a new study shows that dogs are
more likely to react to
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on-screen animal characters on
TV than to human TV characters.
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All that and more still to come
on Space Time.
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our show for a word from our
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back to our show.
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Well, it may sound futuristic,
but scientists believe that
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space-based solar panels could
eventually allow humans to
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harvest energy from the Sun
almost continuously at any
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moment of the day. The big
problem with solar panels and
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wind turbines, of course, is
that they don't provide reliable
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electricity.
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That's because the Sun doesn't
shine all the time and the wind
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doesn't blow continuously. Also
with wind turbines, their carbon
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footprints greatly exceed the
amount of carbon they save. And
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both have the ongoing problem of
what to do with them when they
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wear out in 20 years time.
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And that's why scientists and
engineers are looking at
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alternatives. And one of them
involved two space-based
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projects to put solar panels in
orbit. The first of the two
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projects, named the Innovative
Heliostat Swarm, is in early
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development. But is the most
likely to be able to
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continuously capture Solar
Energy.
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It's a space-based Solar Power
concept, involving a large array
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of mirror-like reflectors or
heliostats in space that direct
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sunlight to a central receiver,
converting it into electricity
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and then transmitting it
wirelessly down to Earth, likely
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using either microwaves or laser
technology.
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The design incorporates
innovations like retro-directive
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RF transmission arrays, highly
efficient PV cells and modular
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structures. Overall, the model
estimates that the heliostat
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design will reduce total system
costs by about 7-15%, offset up
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to 80% of wind and solar, and
reduce battery usage by over
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70%.
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The second concept is named the
Mature Planar Array, and it's
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much closer to being ready. But
it'll only capture Solar Energy
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around 60% of the time. Still,
it's a big step from solar
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panels based on Earth. The array
uses an arrangement of solar
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antenna elements in a flat
rectangular grid similar to
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those already used by satellites
and space stations, so we know
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it's going to be reliable.
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Microwave or infrared emitters
will then be used to transmit
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00:11:39,595 --> 00:11:43,259
that energy down to Earth. But a
report in the journal Joule
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warns that both current designs
are still not yet
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00:11:45,743 --> 00:11:49,227
cost-effective. Nevertheless,
scientists hope the two systems
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00:11:49,259 --> 00:11:52,821
can be honed in order to help
with Earth's future net-zero
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00:11:52,993 --> 00:11:55,634
needs. This is Space Time.
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00:12:11,992 --> 00:12:14,014
And time now to take another
brief look at some of the other
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00:12:14,075 --> 00:12:16,555
stories making use in science
this week with the Science
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00:12:16,598 --> 00:12:20,477
Report. A new study claims that
diets rich in omega-3 fatty
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00:12:20,563 --> 00:12:23,039
acids, which are found
predominantly in fish, may help
209
00:12:23,141 --> 00:12:26,946
ward off short-sightedness in
kids. Meanwhile, a high intake
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00:12:26,947 --> 00:12:30,618
of saturated fats found in foods
such as butter, palm oil and red
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00:12:30,664 --> 00:12:33,211
meat may increase the risk of
short-sightedness.
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00:12:33,868 --> 00:12:36,539
A report in the British Journal
Of Ophthalmology looked at the
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00:12:36,649 --> 00:12:39,077
eyesight of around 1,000
children and compared the
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00:12:39,078 --> 00:12:41,639
development of eye conditions
against the results of a food
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00:12:41,699 --> 00:12:44,721
frequency questionnaire. They
also asked how much time the
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00:12:44,744 --> 00:12:47,166
kids spent outdoors, how much
time they spent reading and
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00:12:47,182 --> 00:12:49,830
writing, and how much time they
spent on screens.
218
00:12:50,486 --> 00:12:52,572
The authors found that the
quarter of kids who consumed the
219
00:12:52,611 --> 00:12:55,713
least amount of omega-3 fatty
acids also had the largest
220
00:12:55,775 --> 00:12:59,010
markers for the progression of
short-sightedness. Meanwhile,
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00:12:59,011 --> 00:13:01,432
the quarter of children who had
the highest intake of omega-3
222
00:13:01,713 --> 00:13:05,182
fatty acids had the smallest
incidence of the condition. And
223
00:13:05,183 --> 00:13:08,221
they also found the inverse to
be true. For kids who consume
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00:13:08,241 --> 00:13:10,544
the highest intake of saturated
fats.
225
00:13:12,223 --> 00:13:15,270
A new study has shown that while
fans can help keep you cool in
226
00:13:15,286 --> 00:13:18,434
hot temperatures, in really dry
hot temperatures, they'll
227
00:13:18,473 --> 00:13:21,395
actually make things worse. A
report in the Journal Of The
228
00:13:21,396 --> 00:13:25,044
American Medical Association
subjected 58 people to various
229
00:13:25,122 --> 00:13:28,325
three-hour heat exposure tests,
looking at how temperature and
230
00:13:28,341 --> 00:13:30,684
humidity impacted the
effectiveness of a fan or
231
00:13:30,747 --> 00:13:33,700
wetting the skin or reducing
body temperature and discomfort.
232
00:13:34,324 --> 00:13:37,645
The authors say that in 38
degrees Celsius heat with 60%
233
00:13:37,646 --> 00:13:41,026
humidity, fan use marginally
improved body temperature and
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00:13:41,027 --> 00:13:44,823
participants reported feeling
less warm. But in 45 degrees
235
00:13:44,846 --> 00:13:47,643
Celsius dry heat, they found
that using a fan actually
236
00:13:47,729 --> 00:13:50,503
increased the participants' body
temperature as well as sweating
237
00:13:50,690 --> 00:13:52,909
and made them feel far more
uncomfortable.
238
00:13:54,581 --> 00:13:57,550
A new study has shown that dogs
are more likely to react to
239
00:13:57,628 --> 00:14:00,487
on-screen animal characters than
humans or other objects
240
00:14:00,550 --> 00:14:01,409
displayed on TV.
241
00:14:02,356 --> 00:14:04,798
The findings, published in the
journal Scientific Reports,
242
00:14:04,959 --> 00:14:09,144
examined the reactions of 450
puppies. The dogs reported as
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00:14:09,164 --> 00:14:12,066
excitable by their owners were
more likely to follow on-screen
244
00:14:12,168 --> 00:14:15,129
animals as if they were real,
while fearful or anxious dogs
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00:14:15,152 --> 00:14:17,847
were more likely to respond to
stimuli such as cars or a
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00:14:17,871 --> 00:14:18,332
doorbell.
247
00:14:18,925 --> 00:14:21,050
The authors warned their
findings may not apply to all
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00:14:21,160 --> 00:14:24,316
dogs, as the survey respondents
were all pet owners whose dogs
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00:14:24,379 --> 00:14:26,582
regularly interacted with TV
stimuli.
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00:14:28,363 --> 00:14:31,357
And time now for our silliest
story of the week. And it seems
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00:14:31,377 --> 00:14:34,222
there's a new contender for the
title of Britain's most haunted
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00:14:34,282 --> 00:14:34,603
pub.
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00:14:35,362 --> 00:14:38,511
The owner of the year-oldy King
's Head Hotel in Chester claims
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00:14:38,530 --> 00:14:41,194
he's experienced bed covers
wrapping tightly around him all
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00:14:41,218 --> 00:14:44,718
by themselves, strange knocking
noises and the sounds of ghostly
256
00:14:44,859 --> 00:14:47,724
children running down the
hallway. Tim Mendham from
257
00:14:47,784 --> 00:14:50,347
Australian Skeptic says it's
worth pointing out the owner is
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00:14:50,386 --> 00:14:53,109
developing a TV series based on
his claims.
259
00:14:53,308 --> 00:14:56,976
There is a hotel in Cessna
called Ye Olde Kingshead, which
260
00:14:57,336 --> 00:14:59,898
is the most haunted hotel in
England. It's not Britain, but
261
00:14:59,899 --> 00:15:03,367
aren't they all? There's a lot
of most haunted buildings in the
262
00:15:03,445 --> 00:15:06,554
UK, of whatever sort. And this
one is one that's been around
263
00:15:06,586 --> 00:15:09,961
for a while, an old pub that
someone bought. They've built it
264
00:15:09,962 --> 00:15:12,586
up a bit and now suddenly there
's all these sort of hauntings
265
00:15:12,632 --> 00:15:12,961
happening.
266
00:15:13,523 --> 00:15:15,632
It's more sort of ghost here
than there is in any other
267
00:15:15,773 --> 00:15:19,518
haunted hotel. Roman warriors,
civil war soldiers, women and
268
00:15:19,659 --> 00:15:22,221
children running up and down the
corridors when it was used as a
269
00:15:22,241 --> 00:15:25,350
brothel, apparently. So it
sounds exciting. This fellow who
270
00:15:25,350 --> 00:15:28,003
's bought it recently and
renovated it has now put cameras
271
00:15:28,004 --> 00:15:30,128
in every room, which is a worry
if you want to stay there.
272
00:15:30,307 --> 00:15:33,018
Uh-oh. Yes, and I think I want
to stay there with someone
273
00:15:33,034 --> 00:15:35,128
watching me. Not only do people
don't stay there very long, they
274
00:15:35,206 --> 00:15:38,331
all go running away screaming
because it's a haunted place.
275
00:15:38,393 --> 00:15:40,753
But of course, you have to also
keep in mind that this is a
276
00:15:40,784 --> 00:15:44,424
fellow who hosts a podcast
called My Haunted Project. He
277
00:15:44,425 --> 00:15:46,268
had several properties and
this...
278
00:15:46,535 --> 00:15:49,599
Haunted project is focused on
quote changing the paranormal
279
00:15:49,698 --> 00:15:52,302
and evolving it to a new level
based on real evidence
280
00:15:52,380 --> 00:15:55,845
eyewitness accounts and 24-7
surveillance he also has a whole
281
00:15:55,884 --> 00:15:58,743
range of different displays
including the great doll which
282
00:15:58,790 --> 00:16:02,431
is a haunted or sort of cursed
doll much like the doll in the
283
00:16:02,478 --> 00:16:05,478
u.s much the same sort of thing
which has their own room that's
284
00:16:05,479 --> 00:16:08,259
in a special glass case said to
be the UK's most haunted
285
00:16:08,384 --> 00:16:12,759
artifact he's got a prime video
program called my haunted hotel
286
00:16:12,962 --> 00:16:15,873
theories with creatures This is
the oldie king's head pub.
287
00:16:15,913 --> 00:16:18,695
He certainly has some money in
this that he wants this to be
288
00:16:18,734 --> 00:16:21,257
true. Whether he really believes
in it, it's certainly promoted.
289
00:16:21,258 --> 00:16:24,183
It's one of the sad things that
these days so many groups, so
290
00:16:24,222 --> 00:16:26,480
many buildings, so many
organizations are putting up
291
00:16:26,566 --> 00:16:28,324
their premises for ghost tours.
292
00:16:28,325 --> 00:16:30,629
I was going to say, he's got
some competition because just
293
00:16:30,644 --> 00:16:33,457
about every hotel in the UK is
said to be haunted.
294
00:16:33,535 --> 00:16:36,675
Yeah, every pub, every ancient
castle, every, you know what,
295
00:16:36,754 --> 00:16:39,675
same in America, there's so many
places. I've even heard of ghost
296
00:16:39,722 --> 00:16:42,288
tours of the Smithsonian.
Museum, which is a bit
297
00:16:42,328 --> 00:16:44,831
depressing, actually, when you
see a body devoted to science,
298
00:16:44,890 --> 00:16:47,413
promoting pseudoscience, to get
some people to wander through,
299
00:16:47,414 --> 00:16:50,237
to add some excitement to the
museum and make some money on
300
00:16:50,238 --> 00:16:50,573
the side.
301
00:16:50,714 --> 00:16:54,581
I definitely think it's NASA who
promoted perigee moons as being
302
00:16:54,698 --> 00:16:57,730
supermoons. So anything to get
people interested in science, no
303
00:16:57,745 --> 00:16:58,542
matter what it takes.
304
00:16:58,745 --> 00:17:01,089
Yes, I find that rather sad,
actually, that anything
305
00:17:01,120 --> 00:17:02,995
including pseudoscience to get
people interested in the
306
00:17:03,011 --> 00:17:05,276
science. But it's happening all
over the place. You'll find so
307
00:17:05,308 --> 00:17:05,433
many...
308
00:17:05,723 --> 00:17:07,625
Buildings that have been
promoted to get some people
309
00:17:07,664 --> 00:17:10,108
wandering through it. But this
guy is obviously has quite a few
310
00:17:10,127 --> 00:17:12,331
runs on the board. He's quite
experienced in the hauntings and
311
00:17:12,332 --> 00:17:14,995
he's sort of made a career out
of it. And that always worries
312
00:17:14,996 --> 00:17:15,331
me a bit.
313
00:17:15,409 --> 00:17:18,159
That's Tim Mindum from
Australian Skeptics.
314
00:17:33,831 --> 00:17:37,372
And that's the show for now.
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