Meet Arrokoth: Ultima Thule, the Most Distant Object Ever Explored, Has a New Name
The small body beyond Pluto visited by NASA's New Horizons spacecraft is now officially known as Arrokoth
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The Mercury Transit of 2019 Has Begun!
Watch while you can—the next transit of the closest planet to the sun will not occur until 2032
Is the Universe a Giant Loop?
A new study suggests the cosmos may be curved in upon itself like a ball—but many experts remain unconvinced
Boeing’s Next-Generation Starliner Vehicle Passes Major Safety Test
Despite a parachute glitch, the spacecraft’s pad-abort system showed it could protect future astronauts
NASA Just Unveiled the Space Suit to be Worn by the First Woman on the Moon
Meet the xEMU space suit—and a new suit for the Orion spacecraft, too
SpaceX’s Starlink Constellation Could Swell by 30,000 More Satellites
The company’s constellation could eventually consist of 42,000 spacecraft
Giant Molecules Exist in Two Places at Once in Unprecedented Quantum Experiment
The new study demonstrates a bizarre quantum effect at never-before-seen scales
Asteroid Dust Triggered an Explosion of Life on Ancient Earth
At 466 million years ago, the breakup of a large space rock may have led to major changes in our planet’s biodiversity
Saturn’s Rings May Be Ancient After All
Against earlier studies estimating an age of just 100 million years, new research suggests the planet’s rings could be as old as the solar system itself
India Locates Its Lost Vikram Lander on the Moon
No signals have been received from the lander, but attempts are underway to establish communication
