National Aeronautics and Space Administration

The Phoenix Mars Lander is working as fast as it can to dig and deliver as many samples as possible before the power produced by Phoenix's solar panels declines due to the end of the Martian summer.

When it comes to firing telescopes and their instruments into the frigid cold of space, the more you test your hardware, the better.

Japan's Hinode spacecraft is beaming back must-see movies of a spectacular solar phenomenon known as 'polar crown prominences.'

New simulations show that stars like the sun can migrate great distances over time. The study may challenge the idea that galaxies have 'habitable zones' that are more suited for life than other areas.

NASA has selected a Mars robotic mission that will provide information about the Red Planet's atmosphere, climate history and potential habitability in greater detail than ever before.

New simulations show that, at least in galaxies similar to our own Milky Way, stars such as the sun can migrate great distances.

This Hubble Space Telescope image of two spiral galaxies shows an interesting feature on the smaller galaxy. Silhouetted in front of the larger background galaxy is a small galaxy, and tentacles of dust can be seen extending beyond the small galaxy's disk of starlight.

Arctic sea ice coverage appears to have reached its lowest extent for the year and the second-lowest amount recorded since the dawn of the satellite era.

Astronomers have unveiled what is likely the first picture of a planet around a normal star similar to the Sun.

While browsing through Cassini images of Saturn's moon Titan, astronomer Mike Brown and some colleagues noticed a recurring pattern of clouds appearing over the frigid moon's north pole.