Miriam Kramer

NASA is expected to make a huge human spaceflight announcement today during a news briefing, and you can watch it live online.

The private spaceflight company SpaceX is planning to launch their fourth official unmanned resupply mission to the International Space Station this week.

NASA officials unveiled a huge new tool that will help them build the space agency's next mega rocket.

Skywatchers on the ground are already catching sight of some amazing looking auroras produced by solar material blown out from the sun during two major eruptions this week.

After two years of driving and drilling on Mars, NASA's Curiosity rover has reached its 'far frontier': the base of a giant Martian mountain.

A new NASA instrument expected to launch to space later this month will help scientists study the Earth in a new way from the International Space Station.

Stunning new photos taken by a telescope in Chile show an incredible grouping of stars that may help scientists solve a stellar conundrum.

The private spaceflight company Boeing has been hard at work designing a capsule that could deliver NASA astronauts to the International Space Station sometime in the next three years.

The full Harvest Moon rises tonight (Sept. 8), and even if you can't see it from your own backyard, you can still watch it live online.

An asteroid will make a close brush with Earth on Sunday, passing by the planet well inside the orbit of the moon.

A bright moon of Saturn stands out against the dark background of the planet in a photo taken by a NASA probe studying the ringed wonder and its moons.

The northern lights are a stunning sight for people on Earth, but even astronauts can see the incredible light shows from outer space.

A dark, spider-shaped cloud of cosmic gas blocks out light from stars in a new image taken by a telescope in the Southern Hemisphere.

A group of geckos sent to space so that scientists could study the lizards' zero-g mating habits have died.

A new NASA mission launched in the Arctic this week could help scientists learn more about Earth's changing climate.

Space fans can get a taste of life in space without ever leaving Earth thanks to new venture from a private spacesuit manufacturer.

NASA's first test launch of its new mega-rocket, the Space Launch System, will blast off by November 2018, a year later than planned. See how the SLS rocket is making progress here.

A robotic space probe is due to set down on a comet in November, and now scientists have identified five sites where it could land.