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Welcome to Astronomy Daily, your source for the latest space
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and astronomy news. I'm Anna and I'm Avery.
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It's Monday, February two, twenty twenty six, and we've got
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a fantastic line up of stories today, exploring everything from
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SpaceX's audacious satellite plans to ancient star maps hidden for centuries.
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That's right, Avery. Today we're diving into SpaceX's jaw dropping
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proposal to launch up to one million solar powered satellites,
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a remarkable archaeological discovery revealing Hipparcas's lost star catalog, and
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China's ambitious solar monitoring mission heading to a unique point
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in space.
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We'll also be discussing the giant star that fulled astronomers worldwide,
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Time magazine special tribute to the Artemis two crew, and
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remembering Gladys West, a hidden figure who helps shape GPS technology.
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It's going to be an incredible journey through space history, present,
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and future.
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So settle in and let's explore the cause most together.
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We're starting with what might be the most ambitious satellite
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constellation proposal ever conceived. SpaceX has filed with the Federal
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Communications Commission seeking approval to launch up to one million
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solar powered satellites that would function as data centers for
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artificial intelligence.
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One million satellites, Avery, that's absolutely staggering. To put that
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in perspective. There are currently around fifteen thousand man made
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satellites orbiting Earth. According to the European Space Agency. SpaceX
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is essentially proposing to increase that number by several orders
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of magnitude.
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The scale is mind boggling, Anna, and SpaceX isn't just
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framing this as a commercial venture. Their filing describes these
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satellites as the most efficient way to meet accelerating demand
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for AI computing power. But they go even further. They're
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calling it a first step towards becoming a Kardashev type
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to civilization, one that can harness the Sun's full power.
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That's quite the vision for our listeners who might not
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be familiar. The Kardashev scale is a method of measuring
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a civilization's technological advancement based on energy consumption. A Type
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two civilization would be able to harness all the energy
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output of its star. But let's talk practicalities here. The
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Verge has pointed out that the one million satellite number
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is unlikely to be approved outright and is probably a
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starting point for negotiation exactly.
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The FCC recently gave SpaceX permission to launch an additional
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seven thousand, five hundred and seventy five Starlink satellites, but
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the third authorization on the remaining fourteen thousand, nine hundred
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and eighty eight satellites proposed. So there's clearly regulatory caution
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about satellite proliferation, and there are very real concerns about
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space to briand and light pollution that come with such
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massive consolations.
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The timing is also interesting. Misfiling comes as Amazon is
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seeking an FCC extension on a deadline to have more
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than sixteen hundred satellites in orbit, citing a lack of
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available rockets. Meanwhile, SpaceX is reportedly considering a merger with
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two of Elon Musk's other companies, Tesla and Xai, ahead
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of going public.
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It really shows how the commercial space sector is evolving
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anna what was once the domain of governments is increasingly
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being driven by private companies with enormous ambitions. Whether SpaceX
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gets approval for anything close to a million satellites remains
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to be seen, but it is certainly signals where they
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think the future is headed.
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It's fascinating to think about, but we'll have to see
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how regulators balance innovation with the very real concerns about
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our orbital environment. Now, let's move from the future to
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the distant past.
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From cutting edge satellite technology, we're traveling back more than
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two thousand years to rediscover one of astronomy's greatest loss treasures.
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Scientists have successfully recovered fragments of the world's earliest star catalog,
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created by the ancient Greek astronomer Hipparchus, from a fifteen
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hundred year old manuscript.
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This is absolutely remarkable. Avery hip Arkas is widely considered
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the father of astronomy. He figured out how equinoxes shift,
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created a magnitude scale to rank star brightness, and tracked
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planetary motion, all more than two thousand years ago without
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any telescopes. But his actual star catalog had vanished from
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history until now.
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The manuscript is what's called a palimpsest, which means it's
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parchment that was wiped clean and reused. In this case,
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Hiparkas's original Greek text was erased and overwritten with Syriac
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religious writings of Saint John Klamacus, the original work was
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literally buried under six layers of ink.
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So how did researchers manage to read text that was
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intentionally erased centuries ago? That used some pretty sophisticated technology.
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A team led by Victor Geisenberg from Sorbonne University used
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X ray technology at the SALC National Accelerator Laboratory to
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scan eleven pages of the Man Script.
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The key was a Hiparkasis original inc had a different
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chemical composition than the later religious texts. The ancient ink
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was rich in calcium, which showed up clearly under X
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ray scanning. They used extremely short X ray pulses, each
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just ten milliseconds long, focused on areas no wider than
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a human.
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Air, and what they've found is remarkable. These aren't just
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historical curiosities. The star positions hipparcs recorded are incredibly accurate
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for naked eye observations. As Giesenberg said, the coordinates they're
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finding are incredibly accurate for something done with the naked eye.
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This gives us a window into how ancient people understood
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and mapped the night sky.
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It's also a testament to early scientific thinking. Hiparkis was
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working without any optical instruments yet he was able to
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create precise astronomical measurements that laid the foundation for future astronomers.
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This discovery, published in the Journal for the History of Astronomy,
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helps us answer fundamental questions about the birth of science itself.
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And the manuscript, now held at the Museum of the
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Bible in Washington, d C. Is so delicate it had
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to be hand carried in climate controlled boxes to the laboratory.
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It's wonderful that modern technology can help us recover these
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ancient insights. Speaking of technology and new vantage points, let's
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turn to China's upcoming solar mission.
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China is making major strides in solar exploration with plans
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to launch its first ever solar probe to the Sun
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Earth L five point. The satellite, called Shihi Too, is
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scheduled to launch between twenty twenty eight and twenty twenty nine,
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and it will provide a unique perspective on solar activity
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that we've never had before.
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For our listeners who might not be familiar, the L
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five point or lagrange point five is one of five
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special locations in space where the gravitational forces of the
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Earth and Sun balance out. It's about one hundred and
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fifty million kilometers from Earth, and spacecraft positioned there require
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minimal fuel to maintain their orbit because they're in a
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stable gravitational equilibrium exactly.
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Anna and L five provides a direct, unobstructed view of
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the Sun without Earth's atmosphere getting in the way. This
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makes it ideal for capturing detailed data on solar magnetic fields, flares,
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and eruptions. GH two will be the first artificial probe
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ever stationed at this location.
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The mission has some impressive capabilities. GH two is equipped
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with cutting edge technology designed for high precision magnetic field detection.
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This will help reveal the intricate dynamics of solar eruptions.
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But here's what's really exciting. The mission aims to predict
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solar activity up to five days in advance.
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That's a game changer for space weather forecasting. Solar flares
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and coronal mass ejections can have profound effects on Earth's
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magnetic field and satellite systems. We've seen how geomagnetic storms
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can disrupt unication networks, GPS systems, and even power grids.
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Having five days advance warning could help protect critical infrastructure.
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It's worth noting this builds on China's previous solar mission.
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In twenty twenty one, China launched shei He, their first
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solar exploration satellite, which captured solar H alpha spectral imaging
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from low Earth orbit. GH two represents a much more
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ambitious leap, heading to a distant and challenging location.
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The mission is a collaborative effort between Nanjing University, the
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China Meteorological Administration, and the Shanghai Academy of Spaceflight Technology.
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It really demonstrates China's growing leadership in space exploration and
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their commitment to understanding space weather, and as.
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We become increasingly reliant on space based technologies, understanding and
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predicting solar activity becomes more crucial than ever. This mission
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could significantly improve our ability to protect satellites, astronauts, and
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infrastructure on Earth. Now, let's turn to a mystery that
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had astronomers scratching their heads.
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Here's a stellar detective story for you. Astronomers thought they
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were watching a massive star called WOHG sixty four undergo
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its death throws, possibly even transforming into a rare yellow
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hypergiant before going super nova. Turns out they were completely wrong.
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This is such a great example of how science works.
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Avery WHG sixty four is located in the large Magellanic
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Cloud and is one of the most luminous dust and
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shrouded red supergiants in its galaxy. In recent years, astronomers
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observed unusual dimming and changing spectral features that suggested the
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star was entering an extremely rare and unstable phase.
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In twenty twenty four, the appearance of a new dust
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cloud around the star seemed to confirm that something dramatic
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was happening. Any researchers thought they were witnessing a massive
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star in its final moments, but fresh observations from a
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team led by doctor Jocko Van Luhn at Kill University
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revealed a completely different story.
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Between November twenty twenty four and December twenty twenty five,
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the team used the Southern African Large Telescope to collect
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detailed optical spectra of woe G sixty four, but they
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found contradicted all the previous assumptions. Instead of the temperature
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increase you'd expect in a yellow hypergiant, they found strong
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absorption bands from titanium oxide molecules.
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And here's why that matters. Titanium oxide molecules can't survive
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in the hotter environments of a yellow hypergiant. That meant
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woe G sixty four hadn't undergone the suspected transformation at all.
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Something else was causing all those puzzling observations.
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The answer turned out to be a companion star. Woh
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sixty four is actually part of a binary system. A smaller,
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hotter companion star orbits the red supergiant and periodically interacts
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with its extended atmosphere. As Van Luhn explained, the atmosphere
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of the red supergiant is being stretched out by the
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approach of the companion star, but it hasn't been stripped altogether.
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So nearly every major indicator that astronomers had interpreted as
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signs of impending stellar death, the fading light, the spectral shifts,
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the dust formation, was actually caused by this companion star.
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Some of the disrupted material even appears to form a
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disk around the hot companion, which contributed to those strange
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spectral emissions.
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Van Luhn described it beautifully. We're essentially witnessing a phoenix
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rising from the ashes. It's not that WOHG sixty four
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won't eventually go super nova. It will, but that event
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isn't imminent despite what all the evidence seemed to suggest.
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This discovery highlights how binary interactions can perfectly mimic the
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hallmarks of a dying star.
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It's a humbling reminder that the universe still has plenty
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of surprises for us. Careful follow up observations with attention
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to dust obscuration revealed that earlier spectral signals were misleading. Now,
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let's shift from stellar mysteries to human achievements as Time
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Magazine celebrates an historic moment.
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As NASA's Artemis two mission sits poised on launch Pad
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thirty nine B at Kennedy Space Center, Time Magazine has
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honored the crew with a special commemorative cover issue that
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draws powerful parallels to one of history's most pivotal space missions.
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The cover features the four Artemis two astronauts Read Wiseman,
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Jeremy Hansen, Victor Glover, and Christina Koch, who are scheduled
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to launch as early as February eighth for a ten
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day lunar flyby mission. The article accompanying it was written
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by Jeffrey Kluk, the best selling author known for Apollo
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thirteen and the Apollo Murders.
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What's particularly poignant is the comparison, Kluger draws to Apollo eight,
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which orbited the Moon in December nineteen sixty eight. That
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was a year of tremendous turmoil in the United States
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and around the world, and Apollo eight's Christmas Eve broadcast
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from lunar orbit provided a moment of unity and inspiration
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that transcended borders and politics.
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As Kluger writes in the article, not every mission touches
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the collective soul, but some do. Apollo eight, Apollo eleven,
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Apollo thirteen. These were less American experiences than global dramas,
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global triumphs, global joys, and he suggests Artemis two could
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work similar magic today.
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The mission itself will push human spaceflight to new limits.
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Artemis two's trajectory will take the crew four thousand, seven
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hundred miles beyond the far side of the Moon, farther
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than our species has ever traveled. That will break the
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old record of one hundred and fifty eight miles past
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the Moon, which was held by the Apollo thirteen astronauts
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during that dramatic nineteen seventy mission.
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NASA Administrator Jared Izikman posted side by side Time magazine
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covers from nineteen sixty eight and twenty twenty six on
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social media, noting that fifty eight years after Apollo eight's
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historic trip, NASA is heading back. He emphasized that through
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the Artemis campaign, the agency aims to maintain American leadership
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in space, land astronauts on the Moon, and establish a
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lunar base, all before the end of twenty twenty eight.
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What strikes me about both Apollo eight and Artemis two
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is their role in opening new chapters. Apollo eight proved
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humans could safely journey to the Moon and return, paving
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the way for Apollo eleven it's landing. Artemis two is
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similarly demonstrating the capabilities that will enable Artemis three to
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put humans back on the lunar surface.