The rover's 26th sample, known as "Silver Mountain," has textures "unlike anything we've seen before," NASA says.

New findings offer clues about the ancient origins of asteroids and their potential role in the formation of terrestrial ...

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

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Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

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

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

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a host of other puzzles connected to the solar system's deep past ...

Pluto-Charon Formation Scenario Mimics Earth-Moon System Jan ... Dust storms on Mars could one day pose dangers to human astronauts, damaging equipment and burying solar panels.

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.