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The first of four instruments to fly aboard NASA's James Webb Space Telescope (Webb) has been delivered to NASA.

The next two Galileo navigation satellites have now endured the harsh vacuum and temperature extremes of space on the way to their scheduled 28 September launch.

The NASA/ESA Hubble Space Telescope has produced a highly detailed image of a pair of overlapping galaxies called NGC 3314. While the two galaxies look as if they are in the midst of a collision, this is in fact a trick of perspective: the two just happen to appear in the same direction from our vantage point.

Saturn's rings lie in the distance as the Cassini spacecraft looks toward Titan and its dark region called Shangri-La, east of the landing site of the Huygens Probe.

The formation of small worlds like Earth previously was thought to occur mostly around stars rich in heavy elements such as iron and silicon.

NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) launched this morning over the central Pacific, beginning its mission to study black holes and other exotic objects.

The strange transformation of sunbeams into rings of light after traveling through small holes or gaps in foliage is similar to the projection of an image onto the back of a pinhole camera. Incidentally, a homemade pinhole camera is the safest way of viewing an eclipse if you do not have special solar viewing glasses.

This image shows changes in the target landing area for Curiosity, the rover of NASA's Mars Science Laboratory project. The larger ellipse was the target area prior to early June 2012, when the project revised it to the smaller ellipse centered nearer to the foot of Mount Sharp, inside Gale Crater.

During a powerful solar blast on March 7, NASA's Fermi Gamma-ray Space Telescope detected the highest-energy light ever associated with an eruption on the sun. The discovery heralds Fermi's new role as a solar observatory, a powerful new tool for understanding solar outbursts during the sun's maximum period of activity.