Earth has quietly picked up a new traveling companion, a tiny captured object that astronomers say will loop around our ...

About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed everything—reshaping Earth, forming the Moon, and scattering clues across ...

Astronomers have spotted an intriguing cluster of objects in the Kuiper belt, an enormous, donut-shaped region of icy objects ...

Potential impactors are most likely to have low velocities and the highest likelihood of hitting Earth during the winter.

SpaceX launched a Falcon 9 rocket with 29 Starlink satellites into low-Earth orbit late Thursday, the 100th orbital rocket ...

Tossing a bad guy into the Sun sounds simple enough, but orbital mechanics make it a far trickier task than you'd expect.

But logistics would be complex. Critics see difficulties ensuring data centers are protected against radiation, space debris and weather. There's also the issue of maintenance and hardware upgrades, ...

NASA released images of an interstellar comet flying past Mars, and scientists expressed doubt about the possibility that it ...

"Similar to the asteroid belt, the Kuiper Belt is a region of leftovers from the solar system's early history. Like the ...

NASA released a trove of never-before-seen images of the interstellar comet 3I/ATLAS, unveiling new characteristics of the ...

An interstellar trespasser known as 3I/ATLAS is almost certainly a comet. So, why do so many people think it's ...

After weeks of silence, NASA has officially dismissed speculation that 3I/ATLAS has anything to do with aliens.