When SpaceX’s Falcon Heavy rocket finally takes off for the first time, a debut now scheduled this fall, there’s a good chance the commercial heavy-lifter will falter short of reaching orbit, company founder and chief designer Elon Musk said last week.

A Soyuz rocket launched from the Baikonur Cosmodrome in Kazakhstan at 1:55 a.m. EST (0655 GMT) Sunday with the Arktika-M 1 spacecraft, the first in a new line of Russian satellites designed to provide weather observations over the Arctic.

After scrubbing a launch attempt Nov. 29 due to a problem with a second stage umbilical, Rocket Lab launched seven small satellites on an Electron booster from New Zealand at 3:18 a.m. EST (0818 GMT) Friday. The Electron rocket lifted off with an upgraded first stage carrying new hardware to control the rocket’s re-entry before teams attempt to catch the booster on future missions for refurbishment and reuse.