1–20 of 444 results
Birth of a Magnetar

Stellar Science

Gamma-ray Flash Heralds Birth of a Magnetar

What happens when two neutron stars don't add up to a black hole?

Arecibo dish damage

Professional Telescopes

Iconic Arecibo Telescope Damaged, To Be Dismantled

The iconic Arecibo telescope, damaged by two cable failures within three months, is beyond repair.

Blue Ring Nebula

Stellar Science

The Case of the Blue Ring Nebula

After 16 years, astronomers have figured out the origin of a strange ring of ultraviolet light, and shed light on a common — but rarely observed — event.

Like moths in the lamplight

Galaxies

Stellar Fossils Reveal the "Kraken" in the Milky Way's Past

Astronomers have reconstructed the Milky Way's merger history, finding that our galaxy has absorbed five large satellite galaxies in the last 12 billion years.

Misshapen monster

Stellar Science

How Big Is Betelgeuse Really?

Knowing Betelgeuse’s size is crucial to understanding its recent bizarre behavior — and predicting when it will go supernova. But it’s harder to figure out than you might think.

Magnetar

Stellar Science

Magnetars Make Some — Maybe All — Mysterious Radio Flashes

In-depth analysis of a flash of radio waves coming from a Milky Way magnetar have convinced astronomers: Magnetars produce at least some fast radio bursts.

ALPINE galaxies

Galaxies

60-second Astro News: Mature Infant Galaxies & A Possibly Rogue Planet

This week in astronomy news: Distant galaxies that look older than they are and a terrestrial planet that might be drifting through our galaxy.

ALMA image of Hubble Ultra Deep Field

Galaxies

Astronomers Chart Star Formation History, Glimpse Fate of the Universe

Astronomers have tallied how star-making material evolved over cosmic time — and they've predicted how long stars will keep forming before the universe goes dark.

Magma ocean and crust

Solar System

Moon’s Magnetism Might Have Protected Earth

The Moon's magnetic field, now long gone, might once have shielded Earth from the young Sun's radiation.

Venus

Solar System

Calling on Amateur Astronomers: Observe Venus!

The Mercury-bound BepiColombo spacecraft will fly by Venus on October 15th, and the mission is asking amateurs for their help.

Planetary nebulae (mostly)

Stellar Science

How Planetary Nebulae Get Their Shapes

New research shows why these celestial gems range in shape from spirals to butterflies.

Comet 67P

Solar System

Comets Have (Ultraviolet) Aurora, Too

Observations from the European Space Agency’s Rosetta spacecraft show that Comet 67P/Churyumov-Gerasimenko has its own aurora.

Sunspots at solar minimum vs. maximum

Solar System

Sun’s Activity Cycle Is Stabilizing

Solar Cycle 25 is here, and forecasts suggest the next decade of the Sun’s activity will mimic the last one — halting a 40-year trend.

Dark matter: Theory vs. Observed

Cosmology

Hubble Images Reveal Dark Matter Problem

Astronomers studying Hubble Space Telescope images of massive galaxy clusters have uncovered a potential problem with dark matter.

Andromeda's halo and 43 quasars

Milky Way

Astronomers Map Andromeda’s Halo

Astronomers have observed 43 quasars in back of our sister galaxy, Andromeda, using the distant beacons to map its halo of hot gas.

Magnetic fields in Serpens South Cluster

Galaxies

See the Invisible: A Gallery of Magnetic Fields

Magnetic fields affect everything from star formation to galaxy evolution. View a gallery of images that show magnetism's role.

Comet NEOWISE

Solar System

Hubble Captures Comet NEOWISE

The Hubble Space Telescope imaged the famous comet on August 8th.

Early Milky Way look-alike

Galaxies

"Dead Ringer" for the Milky Way Found in Early Universe

A cosmic magnifying glass has revealed a Milky Way-like galaxy in the early universe that doesn’t conform to cosmologists’ expectations.

Ceres, ocean world

Solar System

Asteroid Ceres: An Ocean World

Scientists have thought that the largest main-belt asteroid, Ceres, had an ancient ocean beneath its surface. But new data from the Dawn spacecraft show the underground ocean might still be there.

Dust-enshrouded neutron star in Supernova 1987A

Stellar Science

Neutron Star Found in Supernova 1987A

After decades of searching, astronomers have finally found the collapsed core of the nearest supernova recorded in recent history.

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