A neutron star is the densest object astronomers can observe directly, crushing half a million times Earth's mass into a sphere about 12 miles across, or similar in size to Manhattan Island.
When did the first stars and galaxies form? How brightly did they burn? Scientists hope to answer to these questions with the Cosmic Infrared Background ExpeRIment (CIBER).
This photograph taken by an astronaut on the International Space Station shows water of different colors within sub-basins of the Laguna (lake) Verde in the high Andes of northwest Argentina.
Previous surveys showed this ice cap thinning and glaciers retreating. The April 12 mission was to measure several glaciers in the area to see how much the Penny Ice Cap has melted in recent years.
This composite of images from NASA's Chandra X-ray Observatory shows the remnant of Kepler's supernova in low (red), intermediate (green) and high-energy (blue) X-rays.
The giant barred spiral galaxy NGC 6872 is 522,000 light-years across from the tip of one outstretched arm to the tip of the other, making it about 5 times the size of our home galaxy, the Milky Way.
There were several preparatory events with the drill including a test that made the shallow hole on the right, but the deep hole resulted from the first use of the drill for rock sample collection.
Snow-covered deserts are rare, but that’s exactly what the MODIS instrument on NASA’s Aqua satellite observed as it passed over the Taklimakan Desert in western China.
Most neutron stars rotate rapidly, some spinning hundreds of times per second. Scientists have found an unusual, young neutron star with an extremely slow spin - just one turn every 17.7 minutes.
A region of the Sun erupts in a powerful explosion, known as an "X-class" solar flare. These can cause observable effects on earth such as aurorae and power grid and communications satellite failures.