The CEO of Sierra Nevada Corp's space spinoff, Sierra Space, has left the company, with billionaire chairman Fatih Ozmen filling in as interim CEO, the company said in a statement on Monday.

SpaceX is set to launch another rocket from our Space Coast on Monday. The company is aiming for an early afternoon liftoff ...

"Even if a planet is in the habitable zone, if it has too small a water inventory, it transitions to an uninhabitable state." ...