Space

New satellites will give 30-minute warning of solar storm emergencies

Nasa devices, launched this week, will counter rising threat to power networks from surges in sun’s radiation

Martian ‘rock spots’ breathe new life into Nasa mission

Rover’s discovery of a ‘potential biosignature’ has excited scientists

Obituary: Jim Lovell, the calm commander of Apollo 13

The Nasa hero’s ‘Houston, we’ve had a problem’ epitomises an understated but remarkable life