Photos: New GPS navigation satellite powered from Earth

China launched a Long March 2D rocket Saturday with a satellite Chinese officials claimed will study the space environment and conduct technology demonstrations, less than two days after a Long March 4B rocket took off from a different launch site with an Earth-imaging payload.

Failure struck Russia’s troubled space program for the second time in three weeks Saturday, when a Proton rocket carrying a high-tech satellite for Mexico’s new $1.6 billion space-based communications network crashed shortly after liftoff.

A Falcon 9 rocket launching an Argentine Earth-observing satellite streaked across the skies of Southern California on Sunday night, then its booster stage returned to Vandenberg Air Force Base for an on-target landing, the first by SpaceX on the West Coast.