Scientists estimate there are about 500,000 pieces of space junk floating around in space, including fragments from rockets and satellites.
Watch the take off of STS-47. STS-47 was the 50th Space Shuttle mission and the second mission of Space Shuttle Endeavour. The mission mainly involved conducting experiments in life and material sciences.
Watch the STS-47 Take off!
It's bedtime on the ISS and Canadian astronaut Chris Hadfield shows us how astronauts sleep in space.
What's it like to sleep in Space?
Video Credit: Canadian Space Agency
ESA Astronaut Samantha Cristoforetti shows how to use the most unglamorous but often asked-about part of living on the International Space Station: the toilet.
How do Astronauts go to the bathroom in space?
Mars is called the Red Planet because of its red colouring, which comes from the large amount of iron oxide – known on Earth as rust – on the planet's surface.
The Apollo astronauts' footprints on the moon will probably stay there for at least 100 million years.
Space is completely silent. There is no atmosphere in space, which means that sound has no way to travel to be heard.