Nasa says the SLS is "the only rocket that can send Orion, astronauts, and cargo directly to the moon in a single launch." But its expense has been criticized: each SLS launch is estimated to cost ...

Although it won’t be blasting off until mid-2026 at the earliest, preparations are already well underway for the launch of NASA’s highly anticipated Artemis II mission. The endeavor will ...

On Wednesday, one of the Republican space policy leaders most consistently opposed to commercial heavy lift rockets over the last decade—as an alternative to NASA's large SLS rocket—has ...