March 23, 2026
Europe's Rocket Moment, A Hidden Cosmic Explosion, and Brown Dwarfs in Love
Astronomy Daily — Season 5, Episode 70 Monday, March 23, 2026 In today's episode, Anna and Avery cover six stories spanning a live European rocket launch attempt, a sixty-year-old NASA emergency brought back to life through newly surfaced photographs, a cosmic explosion caught only by its echo, the fight to preserve the night sky, a supply run to the ISS with an unexpected complication, and a first-of-its-kind discovery involving brown dwarf stars.
Story 1: Europe's Spectrum Rocket — Bid for Orbit Today Isar Aerospace's Spectrum rocket is attempting its second test flight today — its qualification mission for ESA's European Launcher Challenge. Launching from Andøya Spaceport in Norway, the mission carries five CubeSats and one experiment from European universities and companies, all supported by ESA's Boost! program. If successful, it would mark a landmark moment for European sovereign access to space. Source: ESA — Spectrum's Qualifying Second Launch Story 2: Neil Armstrong — The Gemini 8 Emergency Sixty years ago this month, Neil Armstrong and David Scott survived one of NASA's most dangerous pre-Apollo emergencies aboard Gemini 8. A spacecraft malfunction sent the capsule into an uncontrolled spin reaching one revolution per second. Never-before-seen photographs of Armstrong's recovery have been donated to the Armstrong Air and Space Museum in Wapakoneta, Ohio. Source: Phys.org — Space News Story 3: Astronomers Catch the Echo of a Billion-Sun Explosion Using the ASKAP radio telescope in Western Australia, astronomers identified ASKAP J005512-255834 — a radio signal representing the most convincing "orphan afterglow" of a gamma-ray burst ever detected. The original explosion went unseen because its jet wasn't aimed at Earth, but the lingering radio echo has been detectable for over 1,000 days. Research published in The Astrophysical Journal. Source: The Conversation — A Cosmic Explosion With the Force of a Billion Suns Story 4: The Fight to Save the Night Sky The Royal Astronomical Society, ESA, and the International Astronomical Union have filed formal objections to the FCC over two proposed satellite constellations: SpaceX's application for up to one million orbiting AI data centre satellites, and Reflect Orbital's proposal for 50,000 space mirrors each four times brighter than the full Moon. Experts warn the proposals could permanently transform humanity's view of the night sky. Source: Space.com — Astronomers Protest Giant Orbiting Mirror Project Story 5: Progress 94 Launches to ISS — With a Glitch Russia's Progress 94 cargo spacecraft launched successfully from Baikonur on March 22, carrying around three tonnes of food, fuel, and supplies to the ISS. One of its KURS automated docking antennas failed to deploy after launch. Docking at the Poisk module is scheduled for March 24. If the antenna issue isn't resolved, commander Sergei Kud-Sverchkov will conduct a manual docking. Source: NASA — Progress Cargo Craft Launches to Resupply Station Crew Story 6: First-Ever Brown Dwarf Pair Caught in Mass Transfer Caltech researchers using the Zwicky Transient Facility have discovered ZTF J1239+8347 — the first-ever observed brown dwarf binary undergoing mass transfer. The pair orbit each other every 57 minutes at a separation smaller than the Earth-Moon distance. The system will eventually either merge into a single star or one dwarf will accrete enough mass to ignite fusion. Research published in The Astrophysical Journal Letters. Source: Universe Today — This Pair of Brown Dwarfs Can't Get Enough of Each Other
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Story 1: Europe's Spectrum Rocket — Bid for Orbit Today Isar Aerospace's Spectrum rocket is attempting its second test flight today — its qualification mission for ESA's European Launcher Challenge. Launching from Andøya Spaceport in Norway, the mission carries five CubeSats and one experiment from European universities and companies, all supported by ESA's Boost! program. If successful, it would mark a landmark moment for European sovereign access to space. Source: ESA — Spectrum's Qualifying Second Launch Story 2: Neil Armstrong — The Gemini 8 Emergency Sixty years ago this month, Neil Armstrong and David Scott survived one of NASA's most dangerous pre-Apollo emergencies aboard Gemini 8. A spacecraft malfunction sent the capsule into an uncontrolled spin reaching one revolution per second. Never-before-seen photographs of Armstrong's recovery have been donated to the Armstrong Air and Space Museum in Wapakoneta, Ohio. Source: Phys.org — Space News Story 3: Astronomers Catch the Echo of a Billion-Sun Explosion Using the ASKAP radio telescope in Western Australia, astronomers identified ASKAP J005512-255834 — a radio signal representing the most convincing "orphan afterglow" of a gamma-ray burst ever detected. The original explosion went unseen because its jet wasn't aimed at Earth, but the lingering radio echo has been detectable for over 1,000 days. Research published in The Astrophysical Journal. Source: The Conversation — A Cosmic Explosion With the Force of a Billion Suns Story 4: The Fight to Save the Night Sky The Royal Astronomical Society, ESA, and the International Astronomical Union have filed formal objections to the FCC over two proposed satellite constellations: SpaceX's application for up to one million orbiting AI data centre satellites, and Reflect Orbital's proposal for 50,000 space mirrors each four times brighter than the full Moon. Experts warn the proposals could permanently transform humanity's view of the night sky. Source: Space.com — Astronomers Protest Giant Orbiting Mirror Project Story 5: Progress 94 Launches to ISS — With a Glitch Russia's Progress 94 cargo spacecraft launched successfully from Baikonur on March 22, carrying around three tonnes of food, fuel, and supplies to the ISS. One of its KURS automated docking antennas failed to deploy after launch. Docking at the Poisk module is scheduled for March 24. If the antenna issue isn't resolved, commander Sergei Kud-Sverchkov will conduct a manual docking. Source: NASA — Progress Cargo Craft Launches to Resupply Station Crew Story 6: First-Ever Brown Dwarf Pair Caught in Mass Transfer Caltech researchers using the Zwicky Transient Facility have discovered ZTF J1239+8347 — the first-ever observed brown dwarf binary undergoing mass transfer. The pair orbit each other every 57 minutes at a separation smaller than the Earth-Moon distance. The system will eventually either merge into a single star or one dwarf will accrete enough mass to ignite fusion. Research published in The Astrophysical Journal Letters. Source: Universe Today — This Pair of Brown Dwarfs Can't Get Enough of Each Other
Find us everywhere: astronomydaily.io | @AstroDailyPod
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This episode includes AI-generated content.
WEBVTT
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Hello, and welcome to Astronomy Daily.
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I'm Anna and I'm Avery. It is Monday, March twenty third,
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twenty twenty six, and we are back for another week
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of space and astronomy news.
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And what a way to kick off the week, because
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right now, as you're listening to this, a rocket is
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sitting on a launchpad in Norway waiting to make history.
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We'll have all the details in just a moment.
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We also have the story of a cosmic explosion so
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powerful it would dwarf a billion suns that nobody saw coming.
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We've got a docking drama unfolding at the International Space Station,
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and a pair of so called failed stars that are
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rather brilliantly refusing to fail.
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Plus, we're going to take a little trip back in
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time sixty years to one of NASA's most heart stopping
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emergencies and the extraordinary photos that have only just come
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to light.
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Dick stories, zero filler, Let's go.
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All right, Story one, and we want to say right
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up front, this one one is live, as in the
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launch window for this mission opened just a few hours
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before many of you are listening to us right now.
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That's right today, Monday, the twenty third of March twenty
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twenty six, Germany's Esar Aerospace is attempting the second flight
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of its Spectrum rocket from Andoja Spaceport in northern Norway.
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And this is not just another locket launch. This is
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potentially a landmark moment for European spaceflight.
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For context, until very recently, no orbital rocket had ever
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launched from the European continent. None. If you were a
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European company or agency that wanted to put something in orbit,
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you had to go elsewhere. That changed just under a
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year ago when Spectrum flew for the first time, But
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that first flight ended roughly thirty seconds after liftoff when
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a vent valve issue caused a loss of attitude control
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and the rocket came down into the sea.
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So today's flight, titled Onward and Upward, is the comeback.
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It's esar's qualification, and it's the first time Spectrum will
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carry actual customer payloads. We're talking five CubeSats from European
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universities and companies, including teams from t U Berlin, the
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University of Meraborg and the Technical University of Vienna, all
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flying through ESA's BOOST program.
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And the stakes are real. ESA's European launcher challenge requires
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participating companies to reach orbit no later than twenty twenty seven.
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If Spectrum succeeds today, ESAR takes a massive step toward
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proving European commercial launch is a genuine independent capability.
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The launch window opened at nine pm Central European time,
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that's eight UTC, and ESAR CEO Daniel Metzler has described
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this flight as quote a deliberate step toward delivering sovereign
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access to space for Europe and allied nations.
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So fingers crossed everyone, we will absolutely be covering the
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outcome tomorrow. Spectrum fly straight and fly far.
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Story two, and we're going going back sixty years because
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sometimes the most remarkable stories are the ones history almost forgot.
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Most people know Neil Armstrong as the first human to
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walk on the Moon, but before Apollo eleven, before the
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Sea of Tranquility, there was a moment in March nineteen
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sixty six, sixty years this month, when Armstrong came extraordinarily
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close to not surviving a mission at all.
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Armstrong was commander of Gemini eight alongside pilot David Scott.
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The mission successfully docked with an unmanned a Gina target vehicle,
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the first ever docking of two spacecraft in orbit, a
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critical milestone for the Apollo program, But shortly after docking,
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the joint spacecraft began to roll uncontrollably.
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Armstrong undocked from the aegina, thinking it was the source
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of the problem, but that actually made things worse. The
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Gemini capsule went into a violent spin, reaching one revolution
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per second. The crew were on the verge of losing consciousness.
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Armstrong managed to regain control using the re entry attitude thrusters,
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but using those meant the mission had to be aborted immediately.
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Demini eight came down in a secondary recovery zone in
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the Pacific, where Armstrong and Scott were retrieved by the
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USS Mason after several rough hours at.
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Sea, and now sixty years on, never before seen photographs
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of Armstrong's return, his rescue from the Pacific, his arrival,
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the relief on the faces of those around him, have
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been donated to the Armstrong Air and Space Museum in Wapacanetta, Ohio,
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the museum that bears his name.
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These aren't widely known images, they capture a moment of
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pure human relief, the calm after one of NASA's closest
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calls in the pre Apollo era, and they serve as
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a beautiful reminder that the path to the Moon was
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paid with moments of extraordinary courage under pressure.
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We'll link to more on this story in the show notes.
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If you're a space history fan, this one is well
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worth a read.
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Story three and this one genuinely blew our minds when
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we came across it. It involves an explosion so powerful
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it released the equivalent of the total radio energy output
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of billions of suns, and astronomers completely missed it until
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they found the echo.
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So let's set the scene. Gamma ray bursts are the
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most energetic explosions in the known universe. They happen when
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massive stars collapse and form black holes, firing jets of
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high energy radiation into space. Within seconds, they release more
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energy than our Sun will produce over its entire ten
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billion year lifetime.
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The catch is those jets are incredibly narrow. We only
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detect gammay bursts when the jet happens to be pointing
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directly at Earth. If it's aimed elsewhere, the initial flash
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goes completely onzeene. These are sometimes called orphin afterglows, and
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they've been theorized for decades, but almost never caught until now.
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Using the Australian Square Kilometer Array Pathfinder ASKAP based in
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Western Australia, astronomers detected a radio signal designated as GAP
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JAY zero zero five five one two DASH two five
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five eight three four. It brightened rapidly over a period
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of weeks, then began a slow, steady fade, and it's
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still detectable more than a thousand days later.
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Left almost no trace at visible light or X ray wavelengths,
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which is exactly what you'd expect from a jet that
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wasn't pointed at us. The researchers, led by Ashna Gulati
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and Tara Murphy from the University of Sydney, described this
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as the most convincing orphan afterglow candidate ever identified.
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There is one other explanation, and it's arguably just as wild.
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This signal could be the echo of a star being
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torn apart by an intermediate mass black hole, a category
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of black hole that sits between the stellar mass black
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holes born in supernova explosions and super massive monsters at
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the centers of galaxies. Extraordinarily rare, extraordinarily hard to detect.
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Either way, the discovery opens a new window on some
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of the universe's most extreme events. The team hopes to
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use the same approach to find many more of these
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hidden explosions, cosmic blasts that never announced themselves with a flash,
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but lingered quietly as ghosts in the radio.
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Sky, ghosts in the radio sky. I love that the
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paper is published in the Astrophysical Journal, and it's well
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worth reading.
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Story four, and this one's genuinely alarming. The global astronomy
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community is raising the alarm over two proposed satellite projects
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that experts say could fundamentally and permanently alter humanity's view
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of the night sky.
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The first is SpaceX. In January this year, SpaceX applied
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to the US Federal Communications Commission the FCC for approval
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to launch up to one million satellites as orbiting data
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centers designed to power artificial intelligence systems from space. One million.
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To put that in perspective, right now, there are approximately
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fourteen thousand active satellites and Earth orbit. BaseX is proposing
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to increase that by a factor of over seventy and
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according to astronomers, even a fraction of that constellation would
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add thousands of naked eye visible objects to the night
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sky at any given moment, in some cases outnumbering the
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stars themselves.
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The second proposal comes from a startup called reflect Orbital.
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They want to launch up to fifty thousand mirrors into
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low Earth orbit, each one about fifty five meters wide,
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designed to reflect sunlight back to Earth to power ground
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based solar installations. Each reflected beam, astronomers worn, would be
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around four times brighter than a f full moon, and
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it wouldn't stay in one place.
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Robert Massey, the Deputy executive director of the British Royal
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Astronomical Society, described the situation as quote really intolerable, saying
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it would be quote absolutely the destruction of a central
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part of human heritage.
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The Royal Astronomical Society, the European Southern Observatory, and the
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International Astronomical Union have all filed formal objections to the FCC.
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The ESO estimates that SpaceX's proposed constellation alone could contaminate
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up to ten percent of data from the Very Large
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Telescope in Chile, and potentially up to thirty percent for
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certain kinds of observations.
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The concern is compounded by the FCC's approach to evaluating
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these applications, fast tracking them without requiring environmental impact assessments,
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and the public common period has already closed.
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This is a story we'll be watching very closely. The
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night sky has been a shared human heritage for as
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long as our species has existed. The idea that it
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could be fundamentally transformed, not by a natural event but
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by commercial interests is something the astronomical community feels very
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strongly about, and honestly so do we.
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Story five and the quick heads up, this one is
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also an evolving situation. The docking is scheduled for tomorrow morning.
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Yesterday, Sunday, March twenty second, Russia's Progress ninety four cargo
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spacecraft launched from the Baikanor Cosmodrome in Kazakhstan on a
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Soyuz rocket. It's carrying about three tons of supplies to
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the International Space Station, food, fuel, scientific equipment, and medical
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supplies for the expedition's seventy four crew.
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The launch itself went smoothly, but shortly after separating from
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the rocket, engineers noticed a problem. One of Progress ninety
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four's two TU curse automated rendezvous antennas, the system the
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spacecraft uses to home in on the ISS for docking,
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failed to deploy. As planned.
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Trouble shooting is ongoing and all other systems are reported
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to be working normally. The spacecraft is continuing its two
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day journey to the station regardless. Docking at the Poisk
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module is scheduled tomorrow morning, Tuesday March twenty fourth, at
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around nine thirty Eastern time.
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If the antennas still can't be deployed by then, Expedition
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seventy four Commander Sergei Kutzwershkov will take manual control, highlighting
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the spacecraft to dock using the tellerobotically operated rendezvous system,
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essentially a backup control panel located in this Viesta service module.
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Manual docking of a cargo spacecraft is not something that
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happens every day. It's a demanding procedure, but it's been
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done before. Commander Kudzverrshkov is an experienced cosmonaut and the
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situation is being monitored carefully.
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We'll have an update on how this one resolved intomorrow's episode.
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For now, fingers crossed for a smooth arrival.
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And finally, story six, and this is our favorite one
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of the day. It involves brown dwarfs sometimes called failed stars,
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and a discovery that even the researchers themselves struggled to believe.
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Brown dwarfs occupy a strange middle ground between planets and stars.
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They're more massive than gas giants like Jupiter, but not
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quite massive enough to ignite and sustain the nuclear fusion
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that powers a proper star. They glow a little, mainly
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from deuterium fusion in their earlier years, but they fade
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over time, hence the nickname failed stars.
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Now, binary systems where two objects orbit each other, are
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common in the cosmos, and we've long known that in
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certain binary systems, mass can transfer from one object to another.
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A white dwarf stealing matter from a companion, for instance,
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can eventually trigger a supernova, but this kind of mass
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transfer had never been observed between two brown dwarfs until now.
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A team at Caltech led by graduate students Samuel Whitebook
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was searching through data from the Ziggy Transient Facility, a
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sky survey telescope, when they noticed something unusual. An object
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designated ztf J one thousand, two hundred and thirty nine
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plus eight thousand, three hundred and forty seven was changing
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dramatically in brightness roughly every fifty seven minutes.
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What they'd found was a pair of brown dwarfs orbiting
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each other at astonishing proximity the entire system. Both objects
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would fit within the distance between the Earth and the Moon.
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They're spinning around each other once every fifty seven minutes,
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and one is actively stealing mass from the other through
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what the researchers describe as a kind of gravitational nozzle,
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creating a hotspot that blazes in blue and ultraviolet light.
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Coole author Thomas Prince put it simply, these are very
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exotic objects. We've told some of our colleagues about them,
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and they didn't believe such a thing exists.
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The system is about one thousand light years away in
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the constellation ursa Major, close enough to make it an
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excellent candidate for follow up observations with the James Webbs
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Space Telescope. And as for what happens next, well, there
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are two possibilities. Either the thieving brown dwarf gains enough
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mass to ignite fusion and become a real star, or
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the two eventually spiral together and merge into one brighter object.
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Either way, as white Book puts it, the failed stars
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get a second chance.
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The paper is published in the Astrophysical journal letters and
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it's a genuinely wonderful read.
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And that is your Astronomy Daily for Monday, March twenty third.
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Six stories, one live launch to watch, and one pair
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