One of the things that’s always fascinated me about humans in space is their profound seclusion. Think about cosmonauts cooped up in those tiny modules of the Space Age. Or those Apollo Lunar Commanders who sailed around the Far Side of the Moon utterly alone, out of Comms. reach. Even with his strumming guitar, who could be lonelier than Bowie’s Major Tom communing with a crackly Ground Control? ‘I'm feeling very still.’ So as we Earthlings weather a lockdown we never trained for, what can we learn from astronauts who’ve been doing this for years?