The shattered star at the center was once a white dwarf, a stellar ember no larger than Earth, yet almost as heavy as the Sun ...

Astronomers studying the remnant SNR 0509-67.5 have finally caught a white dwarf in the act of a rare “double-detonation” supernova, where an initial helium blast on the star’s surface triggers a ...

"This tangible evidence of a double detonation not only contributes towards solving a long-standing mystery, but also offers ...

Not 13.8 But Possibly 26 Billion Years Old: New Study Around two years ago, certain observations by the James Webb Space ...

New observations from the James Webb Space Telescope (JWST) suggest the cosmos may be much older than once believed. For ...

Global sea levels rising twice as fast as they did last century, according to major scientific report Every measure of climate change is going in the wrong direction, and some of them faster than ...

WASHINGTON (AP) — The U.S. has approved the world’s only twice-a-year shot to prevent HIV, the first step in an anticipated global rollout that could protect millions – although it’s ...

WASHINGTON – The U.S. has approved the world’s only twice-a-year shot to prevent HIV, the first step in an anticipated global rollout that could protect millions – although it's unclear how ...

A second study found the twice-yearly shot nearly as effective in gay men and gender-nonconforming people in the U.S. and in several other countries hard-hit by HIV.