Watch a 4K replay of the Atlas 5 launching for the National Reconnaissance Office

SpaceX rolled a Falcon Heavy rocket back to its launch pad in Florida Tuesday night for liftoff Thursday with a high-power Viasat broadband satellite, following an eight-day delay for a launch vehicle engine swap.

Mitsubishi Heavy Industries transferred an H-2A rocket to its launch pad at the Tanegashima Space Center in Japan on Sunday, ready to commence a final countdown before liftoff with the Hope Mars mission for the United Arab Emirates.

Scientists eager for answers to long-standing questions about the geology of Mars will get a lift Saturday with the blastoff from California of an Atlas 5 rocket with NASA’s InSight mission, a robotic landing craft that will take the pulse and temperature of the red planet.