Things aren't looking good for Russia's mission to send a space probe to one of the moons around Mars.
The rocket got stuck in the wrong orbit after blasting off earlier this week, and now it's gone completely off track.
Scientists say it's still somewhere in the Earth's orbit, but they haven't been able to contact it. And time's running out.
They say the chances of saving it are very small as in a couple of days the probe's batteries will run out.
The 'Phobos-Grunt' probe is supposed to collect rocks and dust from one of Mars' moons called Phobos, and bring them back to Earth.
If scientists can re-establish contact with the probe and get it back on track, it should reach Mars in September 2012.