American Astronomical Society

Colossal arc of distant galaxies makes astronomers question some of their most cherished principles about the cosmos.

A year ago, the bright red star Betelgeuse in the Orion constellation hit the headlines for a stark fading episode that astronomers couldn't explain. They still can't, although they keep trying.

The future is a slippery thing, but sometimes physics can help. And while human destiny will remain ever unknown, the fate of two of our artifacts can be calculated in staggering detail.

Stars snacking on their companions outside the Milky Way have been precisely mapped and measured for the first time.

Astronomers may have captured the first good look at giant flares from the strongest magnets in the universe.

New data from the Sloan Digital Sky Survey and Europe's Gaia spacecraft suggest that a brush with another galaxy caused the strange, potato chip-like "warp" in our Milky Way galaxy.

Three years ago, two neutron stars collided in a cataclysmic crash, the first such merger ever observed directly. Naturally, scientists kept their eye on it — and now, something strange is happening.

An "Old Faithful"-like event in space may shed light on the nature of stars nearby supermassive black holes embedded in galaxies.

The incoming administration of President-elect Joe Biden and Vice President-elect Kamala Harris may very well make history with their choice to lead the 62-year-old U.S. space agency.

"It was as if somebody had just created a telescope that was a time machine."

The collapse of the iconic radio telescope at the Arecibo Observatory in Puerto Rico last month has left astronomers with a host of questions about what went wrong and what comes next.

Scientists were able to measure the orbit of exoplanet GOT 'EM-1b, a gas giant nearly 1,300 light-years from Earth.

Astronomers may be getting closer to discovering as-yet hidden cosmic secrets, such as the nature of dark matter and the presence of widespread distortions in space-time.

A rocky exoplanet known as TOI-561b was found circling one of the oldest stars in our Milky Way galaxy. The exoplanet is about 50% larger than Earth.

Astronomers just confirmed the existence of KOI-5Ab, which was first flagged as a potential planet by NASA's pioneering Kepler space telescope way back in 2009.

The American Astronomical Society (AAS) is making the most of online opportunities during its 237th meeting, which will fully take place virtually this week due to the coronavirus pandemic.

Two incredibly strange celestial objects whose discoveries trace, in part, to observatories at the summit of Maunakea now carry the peak with them in official names inspired by Hawaiian culture.

You can't rush a superdense star as it gobbles up bites of a neighbor for nearly two weeks before shooting off a burst of X-rays thousands of times brighter than our sun.

A year ago, scientists captured the unphotographable when the Event Horizon Telescope published a fiery orange ring on a black background that became instantly recognizable.