Photos: Atlas 5 rocket aims for International Space Station

A hydrogen-fueled main engine and four solid rocket boosters combined to propel a United Launch Alliance Delta 4 rocket off its launch pad at Cape Canaveral on March 15, successfully sending a U.S. Air Force communications satellite into orbit.

NASA officials released a nearly five-year, $28 billion plan Monday to return astronauts to the surface of the moon before the end of 2024, but the agency’s administrator said the “aggressive” timeline set by the Trump administration last year hinges on Congress approving $3.2 billion in the next few months to kick-start development of new human-rated lunar landers.

An Ariane 5 rocket delivered a robotic space tug and a pair of commercial communications satellites into orbit Saturday following a fiery blastoff from French Guiana, debuting new upgrades in Arianespace’s first mission since temporarily suspending launch operations earlier this year due to the coronavirus pandemic.