Government oversight officials issued a scathing report about delays in NASA's commercial crew program, warning that Boeing and SpaceX are facing "significant safety and technical challenges" with their spacecraft — which could leave NASA astronauts stranded on the ground next year.

They don't know why levels are spiking and dropping.

NASA has added five companies to the list of vendors that are cleared to bid on contracts for the agency’s Commercial Lunar Payload Services (CLPS) program. This list, which already includes nine companies from a previous selection process, now adds SpaceX, Blue Origin, Ceres Robotics, Sierra Nevada Corporation and Tyvak Nano-Satellite Systems. All of these companies can now place bids on NASA payload delivery to the lunar surface.

The unexpected discovery has major implications for long-duration space missions, including trips to Mars.

Luckily, Voyager 2's instruments are in somewhat better shape than Voyager 1's, so scientists were able to observe the transition from the heliosphere, which is dominated by the sun, to the interstellar medium (ISM). 

"Transparency for the taxpayer."

The Mars 2020 rover will investigate an intriguing type of mineral deposit known for producing fossils on Earth.

We may be on the brink of a new gold rush, but not here on Earth. An asteroid made entirely of metal is the subject of a future NASA mission that may allow us to understand more about the Earth’s core and how planets formed. 16 Psyche is a massive asteroid that is particularly interesting due to its metallic composition, which has caused some people to speculate about its potential value.

By 2029, we could have human footprints on Mars, an established base on the moon and maybe even know which worlds beyond ours host life. It's all science fiction right now, but when we look at how far we've come in the past 10 years it suddenly seems less far-fetched.

What do you do if your spaceship comes in for a landing and one of your parachutes doesn't work right? You hope the rest will do the job and get you back to Earth safely. That's the thinking behind a Crew Dragon safety test SpaceX shared to Twitter on Sunday.

A former Nasa scientist claims evidence of life was found on Mars in the 1970s but was ignored. Viking landers, a pair of space probes, were sent to the Martian surface more than 40 years ago to explore the planet. One of the tests they ran was known as Labeled Release, or LR, which was intended to look for signs of life.  Back in the lab, the results seemed to indicate something was happening on the surface.

NASA astronauts Christina H. Koch and Jessica Meir made history today, taking part in the first-ever spacewalk in the agency’s history featuring only women. The two astronauts ventured outside of the International Space Station in order to effect a repair on a failed power controller for the …

NASA experts officially approved the project of the interplanetary station Lucy, which in 2021 should go into space to study the so-called Trojan asteroids of Jupiter. The construction of the device will start in the coming days, said (SwRI) press-service of the US Southwest Research Institute. Trojan asteroids are the last traces of the formation of the solar system, peculiar" living fossils "from that era.

Hundreds of the nearest, newfound exoplanets will soon be scanned for evidence of intelligent life, thanks to a collaboration between leading SETI (search for extraterrestrial intelligence) scientists and NASA's newest planet-hunting satellite. The Breakthrough Listen SETI initiative, based out of the University of California, Berkeley, announced Wednesday that it'll be teaming up with scientists working on the Transiting Expolanet Survey Satellite, the successor to the Kepler Space Telescope that launched in 2018.

Curiosity is Mars' top supermodel. A new selfie proves the fetching NASA rover knows how to pose for the camera on the end of its robotic arm. Work it, Curiosity, work it. You can check out the full high-res image on NASA's Jet Propulsion Lab website. Look to the left of the rover and you'll spot twin drill holes created by Curiosity in this fascinating "clay-bearing unit" area of Mars.

"There are many synergies between what NASA needs to meet exploration goals and Caterpillar technologies used every day on Earth."

It’s not uncommon for astronauts aboard the International Space Station to witness a rocket hurtling from Earth to the stars. But a recent image taken by an American astronaut may be the most beautiful one we’ve ever seen. NASA astronaut Christina Koch tweeted an image yesterday (Sept. 25) that she captured of a Soyuz capsule, which took off from Kazakhstan carrying astronauts from the US, Russia and the first one from the United Arab Emirates. The American passenger aboard Soyuz 61 was Jessica Meir, who trained with Koch, Space.com reported.

When Earth is so far away, it helps to have friends nearby. The usual six-astronaut crew of the International Space Station welcomed three more and a cargo vehicle last week, making for a full house on the orbital outpost. The arrival of NASA astronaut Jessica Meir, Russian cosmonaut Oleg Skripochka and the first United Arab Emirates (UAE) astronaut Hazza Al Mansouri on Friday was followed by the Japanese HTV-8 space freighter the next day, bringing over four tonnes of supplies and fresh science.

For many wannabe astronauts, venturing into the great unknown would be a dream come true. But it can easily turn into an astronaut's worst nightmare.

Strange machine will explore surface ahead of future human landings