Solar System

The great planetary instability, which saw Jupiter and the other gas giants wander chaotically through the solar system, coincides with the collision that formed Earth's moon. Could the two events be linked?

The volcanic surface of Jupiter's huge moon Io got a stunning close-up thanks to NASA's Juno mission.

Tombaugh Regio — the large, pale heart that dominates Pluto's terrain — is made of nitrogen ice that accumulated after a huge, slow-motion impact, new research suggests.

Voyager 1 has been sending a stream of garbled nonsense since November. Now NASA engineers have identified the fault and found a potential workaround.

The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best?

The solar system's eight planets will never truly be in a straight line, but they can get close to it.

From a poem written by a U.S. Poet Laureate to millions of stenciled names, NASA's Clipper spacecraft's trip to Europa will be marked with a human touch.

A new geological study suggests that Mars' gravitational field pulls the Earth closer to the sun over cycles lasting millions of years, warming our climate.

Bits of glass called Hiroshimaites may have formed by processes similar to those that formed the sun and the planets.

Passing stars may have altered Earth's orbit, and its climate, many times throughout cosmic history. New research digs into what that means when it comes to understanding our planet's past.