Millions of pieces of man-made trash are now orbiting the Earth. Some are tiny, others are large enough to be seen with a telescope, but all pose a risk to space craft and satellites.
And according to experts the threat is growing as space becomes more and more crowded.
Some 23,000 pieces of space junk are large enough to be tracked by the US Space Surveillance Network.
This animation tracks the accumulation of space debris from 1950 until now.
