As water piles up before a ship, so material stacks up ahead of high-mass stars moving fast through space. These cosmic bows shocks revealed the runaway stars.
NASA has called off the planned March 2016 launch of the InSight mission to Mars, following failure to repair a leaky instrument in the science payload.
Lakes around the world are warming rapidly, threatening ecosystems and water supplies, says a new study that looked at more than half of Earth's freshwater supply.
The votes are in. The IAU has accepted the people's choice of names for 14 stars and 31 exoplanets. Exoworlds are now named for deities, demons and scientists.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.