Video: Antares rocket returns to flight with new engines

Russia’s Progress supply ship got an upgrade with a successful cargo launch to the International Space Station on Monday to kick off a two-day flight to the complex with more than 2.8 tons of equipment, propellant and water.

Astronaut Scott Kelly, in good spirits and looking surprisingly fit after a record 340 days in space, said Wednesday he could have stayed up longer if necessary, giving him confidence future astronauts will be up to the challenge of even longer flights to Mars and beyond.

China launched an optical Earth observation satellite April 30, beginning a mission designed to provide detailed reconnaissance imagery to the Chinese military.