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Asteroid 2013 TX68 passed safely Monday
The asteroid - whose precise trajectory was unknown - passed Earth on March 7 at 13:42 UTC (8:42 ET) at some 10 times the moon's distance.
March 7, 2016
Are solar eclipses more common than lunar eclipses?
It's sometimes said that, on a worldwide scale, solar eclipses outnumber lunar eclipses by about a three to two margin. True?
March 7, 2016
SpaceX landing attempt failed, as expected
Latest attempt to land Falcon9 first stage at sea was too "hot." Rockets landed too hard on drone ship and tipped. Elon Musk sees good chance for next time.
March 6, 2016
New cosmic distance record via Hubble
Astronomers pushed the boundaries of what's possible with the Hubble Space Telescope to see a galaxy at a time when the universe was only 3% of its current age.
March 6, 2016
Looking for ETs who see us
Astronomers speculate on some 100,000 nearby stars could harbor planets with inhabitants who might have discovered us and might be trying to contact us.
March 3, 2016
NASA astronaut returns from year in space
NASA's Scott Kelly and cosmonauts Sergey Volkov and Mikhail Kornienko landed safely in Kazakhstan on March 2. The landing wraps up Kelly's one-year mission aboard the ISS.
March 2, 2016
False positives in search for living worlds
As the search for habitable exoworlds heats up, scientists will want to know: Is it life, or merely the illusion of life?
March 2, 2016
Why space bodies come in different sizes
Objects in space aren't the same size, but why not? A scientist used a theory he formulated earlier - to explain patterns in nature on Earth - to suggest a reason.
March 1, 2016
Black holes banish matter into cosmic voids
Using a computer simulation, astronomers probe the 'cosmic web' of the universe, its honeycomb-like structure on the largest scales.
February 28, 2016
Multiple cosmic impacts 790,000 years ago
Geoscientists reached this conclusion after dating glassy stones called tektites from various parts of the world.
February 25, 2016
