From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Rocky planets like our Earth may be far more common than previously thought, according to new research published in the journal Science Advances. It suggests that when our solar system formed, a ...

SANTA CRUZ — Xi Zhang, a professor of Earth and planetary science at UC Santa Cruz, has discovered that an exoplanet classed ...

Astronomers have repeatedly observed events near a distant star that mirror processes from the early solar system’s ...

Astronomers have repeatedly observed events near a distant star that mirror processes from the early solar system's ...

A new computational model suggests that Uranus' and Neptune's cores may be less icy than their "ice giant" nickname suggests.

Our sun is about halfway through its life, which means Earth is as well. After a star exhausts its hydrogen nuclear fuel, its diameter expands more than a hundredfold, engulfing any unlucky planets in ...

By tracking tiny stellar wobbles, astronomers have detected planets forming around young stars for the first time.

Astronomers have confirmed a giant planet orbiting a tightly bound pair of young stars, marking a first in direct exoplanet ...

For the first time since Pluto was demoted, the idea of a true ninth planet is edging from speculation toward something ...