Six hundred miles above Earth, four near-perfect gyroscopes spun in superfluid helium to chase a prediction most thought was unmeasurable. This is the story of Gravity Probe B, the decades of ...

Astronomers have identified a giant planet circling a tiny red dwarf star at a distance so extreme that it sits about 690 ...

Voyager 1, NASA’s deep-space probe, could soon become the first spacecraft to reach a historic milestone. In November 2026, the probe will be one light-day from Earth. Launched in 1977, Voyager 1 is ...

As it heads out of the solar system never to return, the deep space probe Voyager 1 is headed for yet another cosmic milestone. In late 2026, it will become the first spacecraft to travel so far that ...

A University of Arizona-led team using a camera orbiting Mars has captured the closest images yet of an interstellar comet so rare that it has sparked wild speculation about its alien origins. The ...

A pair of space probes cruising the solar system may be able to pass through the tail of the mysterious Manhattan-sized comet hurtling towards Earth — but only if the scientists operating them act ...

JAXA's Akatsuki Venus orbiter has officially been shut down well over a decade after launch. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Japan’s Hyabusa2 space probe is currently about 105.5 million ...

Aug. 27 (UPI) --The European Space Agency's Jupiter Icy Moons Explorer is ready for a planned flyby of Venus on Sunday after the agency fixed its communications system. ESA officials commonly refer to ...

Placing an atomic energy source on the lunar surface is “not science fiction,” experts say, but does pose technical challenges. By Kenneth Chang Nuclear reactors have been generating power on Earth ...