I like it when space missions succeed and don't end up exploding or flying off course. The latest one to get excited about is India's Mangalyaan Mars orbiter, which arrived at the Red Planet yesterday and is now sending back some great holiday snaps.
Mangalyaan is making observations and sampling the air to look for evidence of life - past or present - on Mars.
What I find really amazing is that this is India's first attempt to orbit Mars. Other space agencies regularly lose spacecraft trying to achieve that feat.