“It’s a freakishly weird configuration," a planetary astronomer said.

The closest planet with potential extraterrestrial life is Mars, and humans are poised to colonize it

A still-forming moon in a circumplanetary disk could provide scientists with insights into how solar systems form

In his highly anticipated follow-up to "Cold Mountain," Charles Frazier explores 19th century America's brutal program to expel Indians. As a richly imagined historical novel, it draws out the best and worst of literary fiction.

Humans and/or their robot friends will travel to Mars, several asteroids, many moons and more in the 2020s

What if life isn't calculating, but more akin to a "puppy running amok," accidentally destroying its own habitat?

It was no paradise, but young Mars may have been warmer and wetter, according to a new paper

Researchers point the finger of blame at Jupiter's own massive moons

A beautiful but heavy-handed new novel by the author of "Henry and Clara" evokes a post-Civil War Washington of scheming politicians and love-struck astronomers.

No it's not just you. The moon will look blood-red in the wee hours of Tuesday morning, and here's why

Saturn's moon Enceladus ejected plumes of water that contain phosphorus, considered to be a building block for life

An unmanned mission to the mysterious ice giant is at least 20 years away. Scientists say it's worth the wait

Researchers say AI can be used to reveal whether extraterrestrial samples were once teeming with life — or not