Live coverage: 400th Proton rocket takes off with Russian satellite

Check out photos of Wednesday’s launch of a Russian Rockot booster, derived from a decommissioned Soviet-era nuclear missile, with Europe’s Sentinel 3B Earth observation satellite.

Six RD-276 engines powered a Russian Proton rocket off the launch pad Wednesday at the Baikonur Cosmodrome in Kazakhstan, boosting a television broadcast payload for Eutelsat and the first commercial robotic satellite servicing spacecraft into orbit.

A Japanese Epsilon rocket launched Tuesday from the Uchinoura Space Center, a shoreline spaceport on the southern Japanese island of Kyushu, with a space weather research probe to study phenomena inside the turbulent Van Allen radiation belts. Liftoff of the 85-foot-tall rocket occurred at 1100 GMT (6 a.m. EST).