The US Spirit rover on Mars has seen a UFO streak across the Red Planet sky.
Astronomers say it could be the first meteor seen from the surface of another world, or a redundant orbiting spacecraft sent to Mars 30 years ago.
The US Spirit rover on Mars has seen a UFO streak across the Red Planet sky.
Astronomers say it could be the first meteor seen from the surface of another world, or a redundant orbiting spacecraft sent to Mars 30 years ago.