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Will future landers on Europa sink?
Jupiter's moon Europa is an ocean world beneath an icy crust, and scientists want to land a spacecraft there. But a new study indicates a surface less dense than freshly fallen snow.
January 28, 2018
Watch 2nd spacewalk of 2018 live on Monday
Watch on January 29, as two astronauts aboard the International Space Station (ISS) perform the year’s 2nd spacewalk. Live TV coverage starts at 10:30 UTC (5:30 a.m. EST). The spacewalk begins at about 12:10 UTC (7:10 a.m. EST).
January 28, 2018
Ingredients for life in space rocks that fell to Earth
Two rocks that crashed to Earth from space in 1998 are the 1st meteorites found to contain both liquid water and a mix of complex organic compounds such as hydrocarbons and amino acids.
January 26, 2018
January 31 lunar eclipse: What scientists can learn
The lunar eclipse January 31 offers scientists a chance to see what happens when the surface of the moon cools quickly.
January 25, 2018
Scientist proposes yet another new definition of a planet
What's a planet? What's a dwarf planet? What's a brown dwarf? In recent years, astronomers have grappled with these definitions. The newest proposal comes from Johns Hopkins.
January 24, 2018
Hubble Telescope finds substellar objects in Orion Nebula
Yes, the Orion Nebula is a star factory, but a new deep survey has revealed 17 brown dwarf companions to red dwarf stars, a brown dwarf pair, a brown dwarf with a planetary companion plus ... 3 giant planets.
January 23, 2018
Saturn moon Titan has a sea level
A new topographic map of Titan, plus a new study showing that Titan's seas lie at an average elevation - a sea level - just as Earth's do.
January 18, 2018
How massive can neutron stars be?
Settling a long debate, astrophysicists at Goethe University Frankfurt now say neutron stars can't exceed the mass of 2.16 suns.
January 18, 2018
Supercomputer insights on mysterious black hole jets
Scientists used the Blue Waters supercomputer to show that a black hole's relativistic jets and accretion disk both may be spinning - and precessing over time - around an axis separate from the black hole itself.
January 17, 2018
Zooming star points to black hole in globular star cluster
Globular star clusters contain our galaxy's most ancient stars. Astronomers didn't expect to find a 4-solar-mass black hole in one, but ... voila!
January 17, 2018
