Watch the SpaceX Falcon 9 rocket launch the EchoStar 23 satellite

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 is scheduled to lift off Tuesday from a launch pad in Russia’s Far East with a new Russian weather satellite and 18 secondary payloads from companies and institutions in the United States, Canada, Japan, Norway, Sweden and Germany.

Watch a replay from a camera mounted on-board SpaceX’s Falcon 9 rocket as it released one of 10 Iridium Next communications satellites Monday nearly 400 miles above Earth.