Stellar Explosions, Galactic Surprises, and the Controversial Light Beaming Plan

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Anna: Imagine watching a star erupt in high

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definition, frame by frame. Gas

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jets twisting like cosmic fireworks.

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Or discovering that our galaxy's monstrous

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black hole isn't the destroyer we feared.

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Today on Astronomy Daily, we're

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unpacking novae caught in the act. Stable

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survivors orbiting Sagittarius A.

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And a bold plan to beam sunlight into the

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night sky. But at what cost to the stars

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above? I'm Anna, here with my co host

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Avery. Let's dive in.

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Hello stargazers, and welcome to Astronomy,

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uh, daily for December 9,

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2025. I'm Anna, your guide through

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the cosmos from the ground up.

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Avery: And I'm Avery, orbiting right alongside you.

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Whether you're sipping coffee under city

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lights or chasing dark skies in the wild,

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we've got the latest in space and astronomy

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to fuel your wonderful. Today, we're blending

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breakthroughs in stellar explosions, galactic

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survival stories, and even the futuristic

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twist on illuminating Earth while keeping our

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telescopes trained on the heavens. Anna,

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what's got you buzzing today?

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Anna: Oh, Avery, it's those real time nova

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observations. It's like the universe handed

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us a front row seat to stellar drama. But

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let's start there and work our way out,

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okay?

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Avery: Kicking things off with the cosmic

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blockbuster, astronomers have captured stars

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exploding in real time. And what they saw has

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rewritten the script on novae. Published

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just yesterday in Nature Astronomy, this

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study used the center for High Angular

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Resolution Astronomy, or CHARA Array for

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short in California to image two novae as the

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unfolded, revealing ejections far more

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complex than a simple blast.

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Anna: Right, Avery? Novae aren't

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supernovae. They're thermonuclear runaways

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on white dwarfs, siphoning material from

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companion stars. But instead of a

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straightforward shell of gas, these events

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showed multidirectional outflows.

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Take V1674 Hercules,

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the fastest nova on record. It brightened

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and faded in mere days, about

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6,500 to 29,000 light

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years away in our galaxy. Chara's

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interferometry, basically combining light

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from multiple telescopes for super high

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resolution, caught two perpendicular jets

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of gas and timed perfectly with gamma ray

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bursts detected by NASA's Fermi Space

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Telescope.

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Avery: And don't forget V 1405 Cassiopeia,

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the slow burner. At 5,600 light years out,

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it peaked for nearly 200 days. Bright enough

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to spot with the naked eye, the white dwarf

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held onto its outer layers for over 50 days

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before a, ah, delayed ejection again

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syncing with those high energy gamma ray

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rays. It's like the star was staging a.

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Anna: Multi Act Play lead author Elias

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Eady from Texas Tech calls it a shift

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from grainy black and white to high

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definition video. He told reporters

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these observations allow us to watch a

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stellar explosion in real time,

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uncovering the true complexity of how these

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explosions unfold. Gail Shafer,

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chara's director at Georgia State, emphasized

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the text's flexibility. Catching these

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transient events requires adapting our

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schedule as targets of opportunity pop up.

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Avery: Absolutely. As Laura Chomiek from Michigan

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State puts it, novae are laboratories for

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extreme physics, linking nuclear reactions on

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the star's surface to the geometry of ejected

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material and that zippy gamma ray radiation.

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This could reshape how we model binary star

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evolution and even galactic chemistry.

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Anna: Thrilling stuff if you're an amateur imager,

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keep an eye on the skies. These targets of

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opportunity remind us the universe deep

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doesn't wait.

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Avery: Shifting from stellar blasts to human ones,

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the Soyuz MS.27 crew splashed down

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safely yesterday, wrapping up an eight month

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stint on the International Space Station,

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NASA reports. The trio, NASA astronaut

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Johnny Kim and Roscosmos cosmonaut

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Sergei Reichikov and Alexei Zubritsky

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touched down in Kazakhstan after over 260

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days in orbit.

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Anna: It's a textbook return. Avery launched

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last spring, their mission overlapped with

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key station upgrades and a packed research

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calendar. While specifics on

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astronomical experiments are still filtering

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in, this crew contributed to ongoing solar

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observations and microgravity fluid dynamics

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that indirectly support astrophysics

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modeling. Like simulating plasma flows in

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stellar atmospheres. True.

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Avery: And, um, it's a handover moment. The

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station's now prepped for the next rotation,

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keeping that continuous human presence

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humming. No major hitches on descent, per

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NASA's blog. Undocking smooth

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deorbit burn on point and a balmy

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step landing at dawn local.

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Anna: Time 8 months is no small

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feat. These missions remind us that while we

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chase exploding stars from afar,

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boots or rather spacesuits in orbit

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are building the data pipelines for

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tomorrow's discoveries. Welcome home, crew.

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Now for the adrenaline junkies. Our weekly

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launch roundup is still stacked

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nsfspaceflight.com's December 8th update

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highlights uh, a global frenzy China,

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Russia, Rocket Lab, Ula and

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SpaceX all lighting up the pad this week.

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Avery: Leading the pack, SpaceX's Starship

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Flight 6 test from Starbase Texas.

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Eyeing rapid reusability tweaks after last

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month's hop over in China a long March

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7 a lofted more Tiangong station

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modules bolstering their orbital lab,

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Russia's Soyuz 2.1B from

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Mastochny sent a classified payload

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skyward. No spoilers, but whispers of

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comsat upgrades.

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Anna: Rocket Labs Electron nailed a AH dawn launch

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from New Zealand, deploying smallsats for

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Earth observation that double as calibration

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tools for astronomy ground stations.

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And ula's Vulcan Centaur roared on its

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second CERT flight from Cape Canaveral,

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hauling cert payloads towards Geo Key for

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future deep space relays.

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Avery: No major scrubbers reported, though weather

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nipped at a few heels. These aren't just

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fireworks they're the supply lines for

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telescopes in space and probes to the

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stars. If you're tracking live apps like

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NSF's are gold.

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Anna: Agreed. It's a reminder that astronomy

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thrives on reliable rides to orbit.

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Avery: Over to exoplanet hunting the Subaru

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telescope in Hawaii has scored its

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inaugural discoveries a failed star,

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brown dwarf and an intriguing

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exoplanet, marking a milestone for its

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upgraded infrared capabilities.

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Anna: Subaru's no newbie, but these finds,

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detailed in a FreshSpace.com report,

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showcase its revamped seed survey. The

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brown dwarf lurking in a nearby system clocks

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in at just 13 to 80 Jupiter masses

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too lightweight for hydrogen fusion, hence

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the failed tag. But it's got a dusty

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disk hinting at potential planet formation.

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Avery: And the exoplanet? A gas giant orbiting a

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young sun like star about 300 light years

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out, with an orbital tilt suggesting a

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dramatic formation history. Maybe a

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gravitational slingshot from siblings? High

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contrast imaging pierced the glare, revealing

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spectral signatures of methane and water

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vapor.

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Anna: Implications this duo pushes our senses

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of substellar objects and wide orbit worlds,

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refining models of how solar systems

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assemble. Subaru is pointing the way for

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JWST.

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Avery: Follow ups A, uh, stellar debut, pun.

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Anna: Intended Speaking of galactic

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neighbors, new research in astronomy and

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astrophysics reveals our Milky Way's

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supermassive black hole. Sagittarius A

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isn't the wrecking ball we imagined.

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Lead author Florian Peisker's team tracked

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oddballs like G2DSO,

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D9, X3, and X7

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over 2dec with the Very Large Telescopes

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Symphony and NACO instruments, plus

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fresh 2024 Eris data.

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Avery: These objects in the dense central parsec,

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where stellar crowds are millions of times

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our local density, follow stable

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Keplerian orbits hugging within 0.8

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parsecs of Sagittarius A's 4

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million solar mass grip.

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G2DSO not a doomed gas

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cloud but a star shrouded in one,

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resisting tidal spaghettification.

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D9's a binary pair cruising steady

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X7's elongated bow shock form is northward

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bound, untouched. X3, a young

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stellar unit, accelerates but stays on track.

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Anna: Pesker notes the fact that these objects move

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in such a stable manner so close to a black

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hole is fascinating. Sagittarius

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A is less destructive than was previously

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thought, co author Michael Jacek and

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adds it can stimulate star formation or

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exotic dusty objects via binary mergers.

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Avery: This paints the galactic center as a stellar

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nursery lab, not a shredder. Challenging

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destruction models and opening doors to black

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hole ecology.

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Anna: Mind bending? Our black hole's got a soft

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spot.

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Avery: Okay. Wrapping with a provocative

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proposal, startup Reflectorbital

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wants to launch thousands of mirror laden

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satellites by 2030 to beam sunlight

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earthward at night, lighting solar farms.

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Aiding rescues. But astronomers are

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sounding alarms on the fallout.

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Anna: The plan Low Earth orbit satellites

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with panels focusing beams of sunlight

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over 5 kilometer spots four times

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brighter than a full moon. Proponents tout

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round the clock solar power, but critics

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crunch the numbers. Samantha Lawler from the

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University of Regina says it yield mere

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milliwatts per panel in needing hordes

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focused on one spot.

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Avery: To matter the real thing

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for astronomy, it's sky flooding, light

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pollution on steroids. Robert Massey of the

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Royal Astronomical Society calls it

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catastrophic scrambling observations of

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faint stars and planets. John Barentin

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from Silverado Hills Observatory warns of

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scattered beams disrupting wildlife

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navigation, birds, insects,

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migrants via atmospheric glow.

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Aaron Boley from UBC pushes rooftops over

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orbits more efficient and sustainable.

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Anna: A uh, double edged sword. Innovation versus

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the dark we need for discovery.

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Avery: And um, that's our cosmic dispatch for

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December 9, 2025. From

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exploding novae to orbiting survivors, it's

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a universe full of surprises, gentle and

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fierce.

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Anna: Thanks for joining us on Astronomy Daily.

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Tune in tomorrow for more. Got thoughts on

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space mirrors? Hit us on

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social@astrodaily.pod

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Clear skies everyone.

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Avery: I'm Avery.

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Anna: And I'm Anna. Keep looking up.

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Avery: Mhm. You.

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Stories we told.