Astronomers have a new model for the origin of these impossibly primitive cosmic monsters
Black hole merger pinpointed with record accuracy by the LIGO and Virgo observatories
First observed by the New Horizons spacecraft in 2015, the strange spiky features are likely formed from sublimating methane
The mysterious and powerful cosmic outbursts could occur as often as once per second in the observable universe
What causes the Moon to change phases throughout the month? Why is it sometimes visible only during the day and other times only at night? What’s the relationship between these times and the Moon’s phases? The answer in all cases is geometry.
More reflective telescope mirrors allow astronomers to capture more photons—and do more science. Christopher Intagliata reports.
Giant observatory announces long-awaited result
The condition of the world’s second-largest radio telescope remains unclear after being battered by the storm
A new study hints that the most energetic particles ever seen come from far beyond the Milky Way.
The encounter will give the spacecraft a boost on its deep-space trip to fetch samples from Asteroid Bennu
The objects are separated by less than one light year—the most compact pairing of supermassive black holes ever seen
Deep-sea observatory tests technologies for eventual exploration of Europa or other icy moons
The largest experiment ever to probe these mysterious particles could point the way to new physics
NASA and the European Space Agency may soon launch new missions to the solar system’s largest planet
The hellish world WASP-12b is darker than fresh asphalt in visible light, but glows red-hot in infrared
NASA is now considering multiple proposals for a return to the ringed planet
The Cassini spacecraft has spent the last two decades exploring Saturn and its unique moons, making discoveries that will advance space exploration for years to come. Scientific American editors Lee Billings and Mike Lemonick offer a proper sendoff to this historic orbiter.
Watch the epic—and explosive—blooper reel for the Falcon 9 booster’s arduous path to reusability
A new study using data from NASA’s Dawn mission suggests ice may exist beneath smooth patches of the asteroid’s surface