Astronomy

A chance celestial alignment is allowing astronomers to witness a distant star’s explosive death, again and again

Years of weather monitoring suggest a high-altitude locale in Qinghai Province could host future telescopes

A battle for the future of American stargazing is about to begin—and the stakes are sky high

The groundbreaking scientist ushered in a revolution in how we think about the universe. She also lived by a set of principles that made her an exceptional human being

With nearly $2 million in private funding, the controversial new initiative is targeting unidentified phenomena in Earth’s skies and beyond

Both are low-probability but catastrophic events—and both can be mitigated if we act early enough

Astronomers have observed record-breaking photons that strain classical theories of acceleration

The huge object may be the biggest comet ever seen. And it is already showing signs of activity as it approaches the orbit of Saturn

Circumstantial evidence could point to a mind-blowing solution to an antimatter mystery—or to the need for better space-based particle physics experiments

New radio-based observatories could soon detect ultrahigh-energy neutrinos, opening a new window on extreme cosmic physics

Images from the Event Horizon Telescope reveal new details of how supermassive black holes produce huge jets of matter and energy

Astronomers are hunting for the first moon around a planet beyond our solar system