Live coverage: Soyuz crew arrives at International Space Station

Rocket Lab announced Saturday it will hold off launching an Electron rocket on an orbital test flight until early 2018 as officials face the end of a 10-day pre-approved launch window, after a series of scrubs to ensure the booster is ready for liftoff and wait for ideal weather conditions.

SpaceX’s Falcon Heavy rocket could blast off for the first time as soon as Feb. 6, company founder Elon Musk said Saturday, announcing the first official target launch date for the heavy-lifter’s maiden mission from NASA’s Kennedy Space Center in Florida.

One week after two cosmonauts and a NASA astronaut arrived at the International Space Station for a six-month stay, the three crew members they’re replacing packed up their Soyuz spacecraft for a fiery plunge back to Earth Wednesday evening to close out a 196-day mission.