"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

“What we’ve been trying to do is find a baby version of our Solar System somewhere else,” Merel van’t Hoff, an astronomer at Purdue University in West Lafayette, Indiana, tells Nature’s Jenna Ahart.

The Solar System is a fascinating place, with each planet orbiting the Sun at its own unique distance. But how far apart are ...

For centuries, humanity believed that Earth was the center of the universe, a view championed by Aristotle and Ptolemy. But ...

Astronomers have discovered the earliest seeds of rocky planets forming around a baby sun-like star, an unprecedented ...

“We’ve always known that the first solid parts of planets, or ‘planetesimals’, must form further back in time at earlier ...

Answer 17: A meteoroid is a small rocky or metallic body in space. A meteor is the streak of light produced when a meteoroid ...

Can you drink Saturn’s rings? Saturn’s rings were likely first seen by Galileo in 1610. The speed at which an object orbits a ...

An international group of astronomers has witnessed the birth of a planetary system that may one day resemble our solar ...

“For the first time, we have identified the earliest moment when planet formation is initiated around a star other than our Sun,” says Melissa McClure, a professor at Leiden University in the ...