NASA is reconsidering the use of a massive mobile launcher at the Kennedy Space Center, raising questions about costs, delays, and jobs tied to the Artemis moon program.

With the launch of Artemis II planned in a few weeks, NASA is ready to monitor the sun during the mission in order to protect the astronauts while in space.

After a roll back to its hangar for a repair and servicing, NASA is aiming to launch Artemis II in April. Credit: John Kraus/NASA A second campaign to launch four astronauts on a flight test around the Moon is underway at NASA’s Kennedy Space Center amid changes to follow-on missions and a warning of steep technical challenges ahead for lunar lander service providers SpaceX and Blue Origin.

NASA has selected United Launch Alliance’s Centaur 5 upper stage for two crewed Artemis missions planned for 2028. Here's the latest. (AP Photo)

NASA's DART mission didn’t just change the orbit of Dimorphos, the asteroid it hit. It changed the orbit of the larger Didymos around the sun.

Commander Matthew Dominick, pilot Michael Barratt, mission specialists Jeanette Epps and Aleksandr Grebenkin arrived at the International Space Station after docking. Credit: NASA

In one of the biggest surprises of NASA's OSIRIS-REx mission, its target asteroid, Bennu, turned out to be a jagged, rugged world covered in large boulders, with few of the smooth patches of sandy or pebbly material scientists had expected based on observations with Earth-based instruments.

NASA astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko spent 300 consecutive days aboard the International Space Station, reaching that milestone on January 21, 2016. The mission, designed to study the long-term effects of spaceflight on the human body,