When Sentinel-1 is placed in orbit around Earth in a few weeks, it has to perform a complicated dance routine to unfold its large solar wings and radar antenna. Engineers have recently been making sure the moves are well rehearsed.
A group of ex-NASA astronauts and scientists is aiming to keep the world safe by launching the first privately-funded deep space mission and scanning the solar system for dangerous asteroids.
The European Space Agency (ESA) has lost contact with Envisat, its flagship Earth-observing satellite.
GPS jammers are threatening shipping, a conference in the UK has been warned.
A pressure group founded by George Clooney has teamed up with the UN, Harvard University and Google to use satellite images to try and monitor next month's referendum in Sudan.