Watch a replay of the launch of a Japanese navigation satellite

Eight more satellites for Europe’s Galileo navigation fleet will be built by Germany’s OHB System AG and Britain’s Surrey Satellite Technology Ltd. under a contract worth more than $350 million.

A Proton rocket and Block DM upper stage climbed into space Saturday from the Baikonur Cosmodrome in Kazakhstan with Spektr-RG, an astronomical observatory with dual X-ray telescopes developed by Russian and German scientists on the hunt for the signature of dark energy.

Watch a replay of the launch of a SpaceX Falcon 9 rocket from Cape Canaveral shortly after midnight Monday with the SES 12 communications satellite.