"This discovery heralds a broader understanding of the diversity in massive stars' deaths and a need for deeper ...

The burst was so bright that it bounced off the Moon and illuminated Earth’s upper atmosphere, surpassing the brightness of a ...

FXTs are failed gamma-ray bursts, the last signals from dying stars. A decades-long mystery now reveals stellar death is more ...

Astronomers using the Green Bank Telescope in West Virginia have spotted massive clouds of cold hydrogen gas hiding within the Fermi bubbles.

Astronomers believe they've uncovered the source behind mysterious cosmic signals known as fast x-ray transients (FXTs) — and ...

Jets that failed to punch through the outer shell of a dying star are the sources of mysterious X-ray flashes that have ...

Two international teams zoned in on a potential answer to a decades-long mystery surrounding ephemeral cosmic X-rays.

For the first time, astronomers have obtained visual evidence that a star met its end by detonating twice. By studying the centuries-old remains of ...

From asteroids the size of football stadiums to nuclear war and man-made pandemics, it can seem as if humankind is in ...

Using a combination of telescopes, including the International Gemini Observatory, funded in part by the U.S. National ...

After the US dropped atomic bombs on Hiroshima and Nagasaki, two of Japan's largest cities, on August 6 and 9, 1945 ...

Watch an animation of a black hole shooting jets of particles through a "collapsing star at nearly the speed of light" and emit "x-rays and gamma rays (magenta)," according to NASA's Goddard Space ...