Live coverage: Proton fires into space with Eutelsat 9B

Delays have set up the possibility of up to three rocket launches this weekend from different pads along Florida’s Space Coast, including two SpaceX missions on Sunday that could set a company record for the shortest span between two Falcon 9 rocket launches. But in the world of ever-changing launch schedules, numerous factors such as weather and technical issues could thwart launch plans this weekend. 

A Russian Soyuz booster blasted off from a snow-covered launch pad in Kazakhstan on Wednesday with nearly 6,000 pounds of fuel, water and supplies for the International Space Station.

The Rosetta spacecraft neared its comet Saturday, targeting a close flyby within four miles of the tiny world’s jagged nucleus to gain new up-close views of the comet and taste the growing vaporous cloud surrounding it.