A new image has revealed the clearest glimpse yet of an interstellar visitor zipping through our solar system. Video above: Astronomers discover how planets form The Hubble Telescope and its Wide ...

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

The new image, which shows Earth along with an even smaller point of light coming from the moon, harkens back to Carl Sagan's famous Pale Blue Dot image, a shot the Voyager 1 spacecraft took in 1990 ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find ...

Astronomers have confirmed that a recently spotted object is an interstellar visitor, and appears to have come from the center of our galaxy.

Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar system.

A comet from a solar system outside our own was first noticed on July 1 by a NASA telescope located in Rio Hurtado, Chile, as part of the Asteroid Terrestrial-impact Last Alert System (ATLAS).

Black holes about the size of a hydrogen atom could be careening through the solar system unnoticed. But their days of stealth may be numbered. Two teams of researchers propose methods to search ...