1–20 of 405 results
Black hole in another galaxy (artist's illustration)

Black Holes

Did Astronomers Spot a Black Hole in Another Galaxy? Maybe Not

Astronomers might have spotted a stellar-mass black hole in another galaxy — but not everyone agrees with what they found.

Stellar companion strips outer layers from massive star (art)

Stellar Science

Close Companions Help Stars Make More Carbon

Massive stars can produce twice as much carbon when they have a close binary companion, according to a new study. The result is a small but important step in understanding the cosmic origin of elements.

An image of the globular cluster Messier 5

Stellar Science

Unlocking the History of Globular Cluster Messier 5

A new study uses precise measurements of chemical elements to explore the formation history of one of the oldest globular clusters in the Milky Way.

Magnetar

Stellar Science

China’s FAST Observatory Sees More Than 1,000 Radio Bursts from a Single Spot

The largest haul of fast radio burst observations ever recorded, all from a single fast radio burst, is helping astronomers understand what causes these fleeting cosmic phenomena

Apollo 11 photo of Earth with glare from Sun

Science and Space Policy

Did Astronomers See a Distant, Dying Star? Or an Earth-bound Satellite?

What seemed a lucky break — the discovery of a gamma-ray burst in the most distant known galaxy — might instead be the flash of passing space debris. As satellites fill low-Earth orbit, such events might become common.

Superbubble in the Milky Way

Stellar Science

Supernova Blasts Hollowed Out "Giant Cavity" in Space

Some 10 million years ago, dying stars cleared a giant cavity in space and ultimately inspired a new generation of star formation.

Gravitationally lensed supernova, four ways

Stellar Science

60-second Astro News: Solving Supernova Mysteries

This week, astronomers have solved one supernova mystery and predicted a new one — to be solved in 2037.

Artist's illustration of merger-triggered supernova

Stellar Science

New Kind of Supernova Implodes Stars Before Their Time

Astronomers have found the first circumstantial evidence for a supernova triggered by a merger with a neutron star or maybe even a black hole.

M13

Black Holes

60-second Astro News: White Dwarfs Still Burn, Black Holes Merge

This week in astronomy news, we learn that some white dwarfs still burn and image X-rays from black holes almost 12 billion light-years away.

Star with planet

Stellar Science

Astro News: Planet-eating Stars and an Accidental Brown Dwarf

This week in astronomy news: A citizen scientist happens upon a weird, ancient brown dwarf and astronomers discover that Sun-like stars eat their own planets.

Astronomy & Observing News

New Observations Challenge Popular Radio Burst Model

Strange behavior caught by two radio observatories may send theorists back to the drawing board.

Stellar Science

Red Dwarfs Aren’t So Bad (For Planets) After All

Red dwarf stars appear to flare preferentially at high latitudes, which might keep their exoplanets habitable instead of hellish.

RS Oph animation

Celestial News & Events

Recurrent Nova RS Ophiuchi Just Blew its Top!

The recurrent nova RS Ophiuchi just went into outburst — its first burst in 15 years — and it's bright enough to see with the naked eye

Giant flare on a magnetar

Stellar Science

Milky Way Magnetar Spits Gamma Rays on Schedule

A Milky Way magnetar surprises astronomers by burping up gamma rays right when their predictions anticipated.

Smallest white dwarf comparison to Moon

Stellar Science

Moon-size White Dwarf Is the Smallest Ever Found

Astronomers have discovered a white dwarf only slightly bigger than the Moon, making it the smallest ever found. It might even be on the edge of collapse.

Epsilon Aurigae model

Stellar Science

The Giant Star That "Blinked"

Astronomers are trying to understand why a giant star "blinked," fading almost completely before brightening again over the course of about 200 days.

CHIME

Stellar Science

Number of Known Mysterious Radio Flashes Nearly Quadruples

The CHIME telescope has released its first catalog with 492 unique sources of fast radio bursts, the brief flashes of radio waves that have been intriguing astronomers over the past decade.

Neutron star mergers produce r-process elements

Stellar Science

Metal-poor Stars Shed Light on the Origin of Gold

Explosions of massive stars might have produced gold and other rare heavy elements observed in metal-poor stars in our galaxy’s halo.

Spiral galaxies host Fast Radio Bursts

Stellar Science

Fast Radio Bursts Tied to Spiral Arms

New Hubble observations have pinned five enigmatic radio bursts to the arms of spiral galaxies, narrowing down possible explanations.

V1405 Cas scene

Night Sky Sights

Nova in Cassiopeia Brightens Suddenly

A star in the constellation Cassiopeia that flared into view during mid-March has erupted to naked-eye visibility. Catch it while you can!

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