NASA's robotic rover Curiosity is making its mark on Mars. Its tracks are big enough to be seen from space.

NASA's robotic rover Curiosity is making its mark on Mars.

NASA's Dawn spacecraft was set to cruise toward the most massive space rock in the asteroid belt between Mars and Jupiter — a voyage that will take nearly three years.

Thirty-five years after leaving Earth, Voyager 1 is ready to leave our solar system, the first time a manmade object will have escaped to the other side.

PASADENA, Calif. (AP) — Thirty-five years after leaving Earth, Voyager 1 is reaching for the stars.

Sooner or later, the workhorse spacecraft will bid adieu to the solar system and enter a new realm of space — the first time a manmade object will have escaped to the other side.

Perhaps no one on Earth will relish the moment more than 76-year-old Ed Stone, who has toiled on the project from the start.

"We're anxious to get outside and find what's out there," he said.

A Jupiter-bound spacecraft prepared to fire its engine Thursday for an important maneuver intended to bring it back toward Earth.

Will.i.am has premiered his new single — from Mars.