Aerospace

Despite a malfunction that ended its primary mission in May 2013, the Kepler spacecraft is still alive and working and its data has found a new "super-Earth".

NASA's Kepler spacecraft detected planets by looking for transits, when a star dims slightly as a planet crosses in front of it. The smaller the planet, the weaker the dimming, so brightness measurements must be precise and that requires maintaining a steady pointing. Kepler can't really do that any more, its primary functionality came to an end when the second of four reaction wheels used to stabilize the spacecraft failed. Without at least three functioning reaction wheels, Kepler couldn't be pointed accurately.




With the successful flight test of NASA's Orion spacecraft on Dec. 5, a new space era for has started for America and its aerospace industry. Companies engaged in space exploration like Lockheed Martin, which built the Orion spacecraft, learn a valuable lesson from this first and crucial step on a long journey to Mars.

Artistic rendering of the Square Kilometre Array at night. SKA Organisation

By Yves Wiaux, Heriot Watt University and Jason McEwen, University College London

"Dark matter" is a blanket term for inferred matter that is undetected but must exist in order for gravity at very large scales to make any sense at all.

Based on inference, 27 percent of the universe is generally acknowledged to be dark matter, even though it is not visible and eludes direct detection and measurement. Whatever dark energy might turn out to be gets a number of about 68 percent of the universe. The rest of the universe, what we can detect and feel, is what we know to be matter.