1–20 of 433 results
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

Galaxies

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

Stellar Science

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.

Take this one for a whirl

Galaxies

Remains of an Ancient Star Cluster Revealed

A torn-apart globular cluster provides a window into the Milky Way's past.

Two giants orbit a Sun-like star

Exoplanets

First Image of a Young Sun and Two Giant Planets

For the first time, astronomers have imaged multiple planets orbiting a Sun-like star.

EBOSS map of the universe

Cosmology

New 3D Map of the Universe — and a Growing Cosmological Debate

The Sloan Digital Sky Survey has released a new map of the universe — and the results confirm ongoing tension over the expansion rate of the universe.

Brown dwarf

Stellar Science

Citizen Scientists Help Discover “Weird” Brown Dwarfs

Astronomers and citizen scientists have found two would-be stars lacking heavy elements. They’re most likely ancient survivors of our galaxy’s earliest days.

James Webb Space Telescope system test

Professional Telescopes

New Launch Date for James Webb Space Telescope

NASA has delayed its beleaguered James Webb Space Telescope to October 2021, in part due to the COVID-19 pandemic.

The Sun's full disk

Solar System

European Solar Orbiter Takes Closest-ever Images of the Sun

The first images to be released from the European Space Agency’s Sun-imaging spacecraft show intriguing “campfires” that could help explain a solar mystery.

Solar flare

Solar System

New Evidence for Nanoflares?

Astronomers have spotted weak bursts of low-frequency radio emission coming from all over the Sun.

Super-Earth Family Portrait

Exoplanets

Three Nearby Exoplanets to Explore

A trio of nearby exoplanets make tempting new targets for next-gen telescopes.

Erosita's first all-sky X-ray survey

Black Holes

First All-sky Map from eRosita

The first all-sky X-ray map to be released in 30 years reveals new wonders of the hot and energetic universe.

Magnetar

Stellar Science

Astronomers Discover a Newborn Magnetar and a New Cosmic Beat

This week, astronomers announce a newborn magnetar and a fast radio burst that's bursting to a beat.

Ursa Major Arc

Milky Way

Astronomers Discover Huge Circular Arc Near the Big Dipper

The 30-degree circular arc is likely a shock front expanding from a star that exploded some 100,000 years ago.

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