Sierra Space's Dream Chaser spaceplane is facing an identity crisis after NASA changed contract terms to remove its guarantee to buy cargo flights to the ISS.

For 24 hours a day, seven days a week since November 2000, NASA and its international partners have sustained a continuous human presence in low-Earth orbit, including at least one American—a streak ...

Sierra Space Corp. suffered a fresh setback after NASA revised plans to send the company’s spacecraft to the International Space Station.

NASA is not immune to the effects of a government shutdown if congressional leaders fail to reach an agreement before midnight Oct. 1 to prevent one.

NASA’s latest class of astronaut candidates, known as “ascans,” has officially been introduced while Expedition 73 continues its ongoing work aboard the International Space Station. According to a ...

NASA is bracing for the possibility of a federal government shutdown if Congress fails to pass a funding bill –– a recurring crisis that grinds activity to a halt across most civilian agencies in the ...

Curiosity and the desire to explore are traits deeply rooted in human nature. Space exploration is no exception; it reflects humanity's timeless drive to seek new horizons, challenge our limits, and ...

NASA and Sierra Space have agreed to change their deal for its Dream Chaser spacecraft, which will now have its first launch delayed another year.

NASA and Sierra Space have modified the Commercial Resupply Services-2 contract, which originally called for the Dream Chaser spaceplane to be used to supply the International Space Station (ISS).

NASA astronauts Nichole Ayers and Anne McClain complete egress of the International Space Station during a spacewalk mission. Credit: Space.com | footage courtesy: NASA | edited by Steve Spaleta ...

NASA and Sierra Space updated a previous deal that shifts Dream Chaser’s first mission to a free flight test before potential ISS cargo runs.