Progress 64P: Full launch broadcast

Two small Chinese satellites designed to detect gamma-ray bursts associated with gravitational waves launched Wednesday on a Long March 11 rocket, beginning an astrophysics research mission to study black holes and neutron stars.

Russia may start sending just two of its cosmonauts to the International Space Station at a time, according to media reports and comments by a NASA manager, in a cost-cutting measure that could reduce the size of the research lab’s crew to five.

Watch a replay of the launch and landing of SpaceX’s Falcon 9 rocket on Jan. 7 at Cape Canaveral.