Astronomy

From the perspective of the Orion capsule, the moon will fully block the sun’s disk for nearly an hour

Amid a journey of celestial spectacles, the Artemis II astronauts may spot a comet—if it survives a dash past the sun

A single subatomic particle from deep space had the same energy as a baseball pitch, and scientists still don’t know how it got here

In 2017 NASA’s Hubble Space Telescope zoomed in on a comet as it passed around the sun. And then things took a more unusual turn

Long ago, the cosmos might have been a black hole factory—and these primordial objects are even weirder than you think

NASA’s Swift space telescope is doomed to burn up in Earth’s atmosphere later this year. A daring mission to boost it to safety could have big implications for science

A major defense against everything space throws at us, Earth’s magnetic field may even protect the moon from damaging galactic cosmic rays

Just how big can a star become? The answer depends on when in cosmic history you’re asking the question

The stars in the Small Magellanic Cloud aren’t behaving the way they should. A cataclysmic collision with another nearby galaxy may be the culprit

A new data release more than doubles the number of gravitational-wave candidate events—and reveals unexpected complexities of merging black holes

Once unfathomable, the milestone of a single company having 10,000 satellites operating overhead signals that the era of mega constellations is here to stay

Despite years of debate and follow-up studies, an odd streak of cosmic light still defies a final explanation. Is it a giant black hole screaming through intergalactic space?