The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The real one is more random ... He began to suspect that our solar system’s history had been anything but smooth—that it had somehow endured a “global gravitational instability,” as ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but get a telescope and you can spot Neptune and Uranus.

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Astronomers using the James Webb Space Telescope (JWST) have uncovered a planet so extraordinary it has defied all existing ...

In October 2020, a van-sized robotic spacecraft briefly touched down on the surface of Bennu, a 525-meter-wide asteroid 320 million kilometers from Earth.

So, what if I told you that astrophysicists think there's one lurking in our very own solar system? Reporter: Then a new discovery rocked the astronomical world to its foundation. Narrator ...

Images like that have captured imaginations during this surprisingly active solar cycle, and emphasized the importance of SDO in our solar early warning system ... near real-time images and ...

Staring at the sun—a close (but safe) look at our home star Staring at the sun ... Free learning activities and videos about the solar system Free learning activities and videos about the ...