Astronomers solve 900-year-old cosmic mystery surrounding Chinese supernova of 1181AD

Chinese astronauts send back stunning images of Earth from Tianhe space station module (photos)

Distant 'Requiem' supernova will be visible again in 2037, astronomers predict

Astronaut Mark Vande Hei and Cosmonaut Pyotr Dubrov had their mission on the ISS extended to a year in the light of space tourists arriving with Soyuz MS-19 in October.