"Senior NASA officials told GAO that at current cost levels, the SLS program is unaffordable," the new report states. The Government Accountability Office expressed serious concerns about NASA's ...

President Donald Trump’s proposed budget looks to end the Space Launch System rocket, Orion spacecraft and Gateway space station that are central to NASA’s existing Artemis program — ...

NASA officials have said their SLS mega-rocket program is "unaffordable." The program has long been criticized for a lack of transparency over its growing budget. Officials agree the SLS budget ...

Experts agree China is a valid threat to NASA's return to the moon plans. Here's why there is a rush to get SLS off the ...

In recent years NASA has acknowledged that its large Space Launch System rocket is unaffordable and has sought to bring its costs down to a more reasonable level. The most recent estimate is that ...

NASA needs to be more transparent about the costs and schedules associated with its Space Launch System (SLS) moon rocket, a newly released audit has found. SLS is NASA's rocket of choice for its ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. On the heels of the ...

NASA is looking at Friday or next Monday for another go at launching its huge Space Launch System (SLS) rocket after the first attempt was scrapped. The highly anticipated launch follows more than ...

NASA's $4.1 billion Space Launch System moon rocket was hauled out of the iconic Vehicle Assembly Building Tuesday at the Kennedy Space Center in Florida for a 4.2-mile overnight trip to pad 39B ...