Latest / Space News Today / Spacecraft Drama, Galactic Neighborhoods, and the Push for a Circular Space Economy

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Spacecraft Drama, Galactic Neighborhoods, and the Push for a Circular Space Economy · Space News Today

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  Hello and welcome to [music] Astronomy
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  Daily, the podcast that brings you the
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  biggest news from across the cosmos. I'm
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  Avery and as always, I'm joined by the
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  brilliant Anna.
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  >> Hi Avery and hello to all our listeners.
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  We have a packed show [music] today
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  covering everything from drama in low
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  Earth orbit to the ancient history of
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  Mars. [music]
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  >> It's going to be a great one. Let's
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  start with a story that sounds like
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  something out of a movie. a damaged
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  [music] spacecraft making an emergency
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  return to Earth.
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  >> That's right. We're talking about
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  China's Shenzho 20 spacecraft. It was up
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  at the Tong Gang space station, but it's
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  now being sent back to Earth uncrrewed
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  after sustaining some damage.
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  >> Damage from what? This is the scary part
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  of space travel.
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  >> The suspected culprit is a
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  micrometeoroid estimated to be smaller
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  than 1 mm. It appears to have caused a
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  crack in the window of the return
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  capsule.
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  >> Wow, less than 1 millm. It's amazing how
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  something so tiny can be such a huge
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  threat at orbital velocities. So, what
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  happened to the crew?
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  >> Well, this is where the safety protocols
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  really shine. The crew was forced to
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  return to Earth on a different vessel,
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  the Shenzhia 19, which was docked as a
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  lifeboat. This is actually a first for
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  China's space program, having to use a
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  backup ride home like this.
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  >> That's a testament to good planning. So
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  now they're bringing the damaged capsule
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  back on its own to figure out exactly
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  what happened.
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  >> Exactly. The uncrrewed return will allow
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  engineers to inspect the damage up
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  close. It's a critical learning
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  opportunity for understanding the
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  realworld risks of orbital debris and
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  micrometeoroids.
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  >> Absolutely. Now, from the dangers in our
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  cosmic neighborhood, let's zoom way out
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  to look at how a galaxy's neighborhood
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  shapes its entire life.
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  >> Right. This comes from a huge project
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  called the Deep Extragalactic Visible
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  Legacy Survey, or Devils for short.
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  >> Got to love the acronyms. So, what did
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  the Devil's Survey find?
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  >> It confirmed something astronomers have
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  long suspected. that a galaxy's local
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  environment, its neighborhood, has a
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  huge impact on its evolution.
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  >> So, it's cosmic real estate. Location,
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  location, location.
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  >> Pretty much. The data shows that
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  galaxies in more crowded environments,
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  like dense galaxy clusters, have much
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  slower star forming rates compared to
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  their more isolated cousins out in the
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  cosmic voids.
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  >> That makes sense. In a crowded cluster,
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  there are more gravitational
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  interactions, more mergers, and
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  processes like ram pressure stripping,
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  where a galaxy's star forming gas can be
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  torn away as it moves through the
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  cluster.
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  >> That's the leading theory. And this new
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  data release from Doubles provides some
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  of the strongest evidence yet to back it
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  up. It helps us understand why some
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  galaxies are vibrant and full of new
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  stars while others are old, red, and
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  retired.
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  >> It's cosmic evolution in action. The
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  Devil's Survey is essentially creating a
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  census of these different galactic
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  lifestyles, helping us piece together
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  the complete life cycle of galaxies
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  across the universe.
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  >> A fascinating study indeed.
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  >> Speaking of crowded environments, things
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  are getting very busy right here at
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  home. This week is absolutely jam-packed
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  with launches.
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  >> It really is. There are 10 orbital
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  launches on the calendar. Let's run
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  through the highlights.
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  >> Leading the charge, as usual, is SpaceX.
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  They have a staggering five Starlink
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  deployment missions scheduled for this
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  week alone. The internet constellation
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  just keeps growing. Then over in French
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  Guana, Arian Space is set to launch
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  South Korea's Comat 7 satellite, which
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  is a very highresolution Earth
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  observation satellite.
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  >> Mhm. And don't forget Rocket Lab.
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  They're launching from New Zealand
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  carrying the Rays 4 Demonstrator
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  Satellite for JAXA, the Japanese Space
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  Agency. And speaking of Japan, their own
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  new heavy lift rocket, the H3, is slated
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  to launch a crucial navigation satellite
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  for their national GPS system. Plus,
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  China has two of their own launches
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  scheduled. It's non-stop.
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  >> That H3 rocket launch for Japan is
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  particularly significant, isn't it?
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  They've had a few setbacks with that
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  program.
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  >> It is. The H3 is Japan's next generation
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  flagship rocket. Designed to be more
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  affordable and flexible than its
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  predecessor. A successful launch is
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  crucial for securing Japan's independent
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  access to space and for competing in the
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  commercial launch market. This mission
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  will be a major test of its capabilities
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  and reliability after a failure on its
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  debut flight.
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  >> And the Comat 7 for South Korea, what's
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  its primary role? Comat 7 is a powerful
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  reconnaissance satellite. With its very
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  high resolution imaging, it can be used
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  for national security, disaster
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  monitoring, and managing natural
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  resources. It's part of a growing trend
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  of nations developing their own advanced
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  Earth observation capabilities.
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  >> It really shows you the current pace of
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  the global space industry. Okay, from
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  low Earth orbit, let's journey to a
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  place that was once much more active,
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  the surface of Mars.
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  >> This is one of my favorite stories this
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  week. A new study has produced an
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  incredible map of 16 massive ancient
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  river drainage systems on Mars.
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  >> 16 separate systems? Are we talking
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  about small streams here?
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  >> Not at all. The study says these systems
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  are similar in scale to some of the
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  large drainage basins we see on Earth.
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  And get this, combined, these 16 systems
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  transported nearly half of all the
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  sediment that was ever moved by rowers
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  on Mars. They were enormous.
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  >> Half of all the sediment. That's
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  mindboggling. It paints a picture of a
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  very different, very wet ancient Mars.
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  And I assume this has big implications
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  for the search for life. Absolutely. The
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  researchers identified these locations
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  as extremely promising places to search
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  for signs of past Martian life. If life
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  ever existed on Mars, these ancient
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  water carved river beds and deltas are
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  some of the best places we could
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  possibly look for evidence.
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  >> It's incredible to think about how they
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  piece this together. How do they map
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  rivers that dried up billions of years
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  ago? They use highresolution topographic
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  data from orbiters like the Mars
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  Reconnaissance Orbiter. Scientists can
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  trace the faint outlines of river
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  channels, deltas, and aluvial fans
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  carved into the landscape. By analyzing
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  the geology and the minology, looking
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  for clays and carbonates that typically
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  form in water, they can confirm these
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  were indeed liquid water environments.
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  It's like planetary scale archaeology.
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  And if we do send her over there, what
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  kind of bio signatures would they look
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  for? Not fossils, I imagine.
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  >> Probably not complex fossils. They'd be
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  searching for chemical bio signatures,
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  specific organic molecules or isotopic
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  ratios that are difficult to explain
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  through non-biological processes.
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  Finding preserved microbial mats or
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  stroalite like structures would be the
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  absolute jackpot. But chemical traces
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  are a more likely target. Well, let's
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  hope a future rover gets to visit one of
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  those spots. Okay, while Mars' water is
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  long gone, our own star is incredibly
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  active right now.
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  >> That's an understatement. The sun just
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  unleashed a powerful X1.9 class solar
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  flare.
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  >> And as a reminder for everyone, X-class
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  flares are the biggest and most
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  energetic category. This was a major
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  event.
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  >> It was. It erupted from a newly emerged
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  sunspot region and caused a strong
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  shortwave radio blackout over Australia
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  and the surrounding region.
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  >> But that's not even the main event, is
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  it? There's something bigger on the
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  horizon.
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  >> Correct. The sunspot region that caused
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  this flare is concerning. But an even
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  larger and more complex region is now
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  rotating into an earth-facing position.
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  This is the very same sunspot that was
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  responsible for the powerful flares and
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  incredible aurora displays we saw last
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  month.
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  >> So, space weather forecasters are
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  watching it very, very closely. We could
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  be in for another active period.
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  >> Indeed. And it's important to remember
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  the potential impact. A strong
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  earthdirected coronal mass ejection,
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  which often accompanies these big
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  flares, could disrupt our power grids,
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  damage satellites, and interfere with
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  GPS and communications. We're far more
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  technologically dependent now than we
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  were during the last major solar
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  maximum.
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  >> So, this isn't just about pretty
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  auroras. There's a real need for
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  accurate space weather forecasting to
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  protect our infrastructure.
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  >> Exactly. Agencies like Noah's Space
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  Weather Prediction Center work around
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  the clock to monitor the sun. Their
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  warnings give satellite operators time
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  to put their spacecraft into safe modes
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  and utility companies time to prepare
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  their grids for potential geomagnetic
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  disturbances. It's a critical and often
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  unseen line of defense.
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  >> Definitely. Now, all this activity we've
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  discussed, the launches, the satellites,
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  the debris, it all leads into our final
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  story, which is about finding a
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  sustainable way to operate in space.
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  >> Right. The growing problem of space
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  debris. What's the new idea for tackling
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  it?
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  >> Experts are strongly advocating for what
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  they call a circular space economy. The
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  idea is to move away from the
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  traditional model of launching
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  something, using it, and then abandoning
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  it in orbit.
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  >> So, it's about applying the principles
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  of recycling and reuse that we talk
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  about on Earth, but in orbit.
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  >> Exactly. This means designing satellites
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  and spacecraft for durability, for
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  easier repair, and for potential reuse
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  or recycling of their components. It
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  also involves creating multi-purpose
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  space stations that can serve as inorbit
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  repair and refueling depots and
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  developing technologies to actively go
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  and recover existing debris.
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  >> It's a huge but necessary shift in
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  mindset. If we want space to remain
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  accessible for future generations, we
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  can't keep treating it like an infinite
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  resource.
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  >> That's the core of the argument. It's
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  about building a sustainable future, not
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  just for Earth, but for our activities
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  beyond it.
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  >> It seems like a monumental task. Are
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  there companies actively working on this
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  technology now, or is it still mostly
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  theoretical?
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  >> Oh, it's very much moving from theory to
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  practice. You have companies like
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  Astroscale developing satellites
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  designed to capture and de-orbit space
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  debris. Others are working on robotic
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  arms for inorbit servicing to repair and
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  refuel existing satellites, extending
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  their operational lives. Even NASA is
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  investing in technologies for inspace
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  manufacturing and assembly, which
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  reduces the need to launch massive
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  monolithic structures from Earth.
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  >> So, the building blocks are being put in
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  place. It's not just about cleaning up
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  the mess, but also about building
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  smarter from the start. That's the
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  fundamental shift. Sustainability have
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  to be part of the design process from
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  day one. It's an investment that will
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  pay off by ensuring that the
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  opportunities of space remain available
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  for the long term.
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  >> I couldn't have said it better.
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  >> A perfect note to end on. And that is
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  all the time we have for today's journey
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  through the latest in space and
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  astronomy.
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  >> From near-earth challenges to the grand
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  scale of the universe, there's always
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  something new to discover. Thank you for
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  tuning in.
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  >> I'm Avery
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  >> and I'm Anna. Join us tomorrow for
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  another episode of Astronomy Daily.
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  Until then, clear skies everyone and
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  keep looking up. [music]
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  [singing]
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  Stories [music] told.