They are constantly circling hundreds of miles above our heads.
Maggie reveals how satellites have revolutionised exploration, communication and spying.
ALMA is the biggest observatory ever and it takes space observation to new heights.
You're probably not as clever as the Professor, but maybe you know a thing or two.
There are 8 planets orbiting the sun. Or was it 9?
Earlier human exploration provides key lessons for mankind’s future direction in space.
In recent decades, technology has allowed us to move beyond pure speculation about aliens.
Joe Kittinger once held the record for the highest freefall jump.
Orbit - Earth's Extraordinary Journey brings the wonder of our planet to your living room.
The twentieth century dawned the age of space exploration.