�鶹������ҳ���

In an ocean far far away lies the spacecraft cemetery. Sound strange? Let us explain.

At the furthest place away from any human civilisation and 4km under the sea lies the space cemetery.

It's where old satellites, rocket parts and space stations are sent when their space journeys come to an end.

It's a deserted spot in the Pacific Ocean, east of New Zealand, where the items lie on the seabed forever.

What will happen to the ISS?

The technical name for this area of water is called the ocean point of inaccessibility, because it is so far away from any land - 2,700km away exactly. But it is more commonly known as the space cemetery or Point Nemo.

This is where the International Space Station (ISS) that is currently orbiting Earth is likely to end up.

The ISS launched back in 1998 and astronauts have been living on board ever since. It is due to operate until 2024, but it is starting to age.

It's 357ft long, which is about the same size as a football pitch and made from many parts so they'll have to separate it in a controlled way before breaking it apart and sending it to Point Nemo.

Graveyard orbit

When spacecraft die they become a danger to everything in orbit. Space debris can block up space and with the speed they travel they could cause damage to other space craft.

Nasa say there are thousands of bits of space junk out here.

"There is so much junk that we are worried one tiny collision could trigger a big chain reaction. This possibility is called the 'Kessler Effect'," Nasa says.

To stop collisions happening when you send something in space, you must have a plan in place to either send it back to Earth's atmosphere or into graveyard orbit, says Nasa.

Very high satellites can be sent into what they call graveyard orbit. This is an orbit nearly 322km (200miles) further away from Earth.