The mysterious bright spots on the dwarf planet Ceres are better resolved in a new sequence of images taken by NASA's Dawn spacecraft on May 3 and 4, 2015. The images were taken from a distance of 8,400 miles (13,600 kilometers).
NASA has beefed up a process of traffic monitoring, communication and maneuver planning to ensure that Mars orbiters do not approach each other too closely.
The U.S. Air Force is keeping close tabs on Russia's tumbling, out-of-control space capsule as it comes closer to re-entering Earth's atmosphere.
The only spacecraft ever to orbit Mercury, NASA's Messenger, is ending its four-year tour at the solar system's innermost planet with a crash landing.
There are thousands of satellites in Earth orbit, of varying age and usefulness. At some point they reach the end of their lives, at which point they become floating junk. What do we do with them then?
Unboxing the Mercury Magnetospheric Orbiter at ESA's Test Centre, Japan's contribution to the joint BepiColombo mission to the innermost world of our Solar System.
A Russian spacecraft designed to carry supplies to the International Space Station is spinning out of control as it orbits Earth.
The James Webb Space Telescope will be Earth's premier space observatory for the next decade, serving thousands of astronomers worldwide. However its scientific mission will be limited. Unlike Hubble, which is nearing the ...
When many people saw the first stunning photos of the fragile blue marble of Earth from space, it changed their outlook of humanity. It was a singular moment in time when people around the world were watching and looking ...
An Ariane 5 has lifted off from Europe's Spaceport in Kourou, French Guiana and delivered two telecom satellites into their planned orbits.