As his time on the International Space Station (ISS) comes to an end, NASA astronaut Matthew Dominick has been treating us with breathtaking images of Earth. His recent post on Twitter features a picture of Cairo and the Mediterranean region illuminated by moonlight. He also captured red sprites - a rarely seen electrical phenomenon - during his approach to Africa. Dominick, along with three other astronauts, is scheduled to return to Earth on Thursday, but their departure could be delayed due to bad weather conditions.