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  Space
Where does space begin?
Who was the first person in space?
Have there been any space disasters?
How do I become an astronaut?
What other way could I go into space?
When will a person walk on Mars?
Will we ever reach the stars?
Space milestones
How do I find out more?

 
Where does space begin?
There is no clear boundary because the atmosphere gradually thins the higher you go.

The lowest artificial satellites can orbit at about 160km (100 miles) above the Earth - but even at this height traces of the atmosphere we breathe are enough to slow them down.

    Other orbits:
  • Space shuttle - 300 km (185 miles)
  • International Space Station 350 km (220 miles)
  • Passenger aircraft - 9 km (6 miles)
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5 4 3 2 1 Blast off! Satellite launch pics
C-3PO in the hotseat! Watch the video here
Try our space quiz! Get spaced out with our quiz!
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