O'Grady and her colleagues found no sign of X-rays in the Chandra data. Even assuming that the wind gusting out of Betelgeuse ...

New X-ray observations reveal Betelgeuse’s mysterious companion is not a collapsed stellar remnant but a young, Sun-like ...

Researchers analyzing pulsar data have found tantalizing hints of ultra-slow gravitational waves. A team from Hirosaki ...

A new paper presents a method for distinguishing between different sources of nanohertz gravitational waves. Pulsars may be revealing faint ripples in the fabric of the universe, ultra–low-frequency ...

Planets do not emit visible light like stars; they shine in the sky because they reflect sunlight. Exoplanets too reflect starlight, and nobody does it better than LTT9779b. This world reflects 80 ...

The most energetic events in the universe are gamma ray bursts, beams of radiation so intense they could wipe out all life on ...

Autumn has draped itself across the northern hemisphere, heralding the onset of longer, darker nights that serve as the ...

Stars and satellites are meeting more frequently in the night sky, raising vital questions about the future of astronomy.

Astronomers have detected the first “heartbeat” of a newborn star within a cosmic explosion, revealing a rapidly spinning ...

An excess of gamma rays in the center of our galaxy could mean scientists have finally detected dark matter particles—or not ...

New simulations tilt the scales for competing theories about excess gamma ray light at the center of the galaxy ...

Comet Lemmon will be visible during October 2025 during the Orionid and Taurid meteor showers, creating a month of potential comets, "shooting stars" and fireballs. (2024's Comet 12P/Pons-Brooks is ...