Fastest Star in the Galaxy Has a Strange Origin
Hypervelocity Star Speeding Away
March 5th, 2015
The fastest-known star in the Milky Way is on a path out of the galaxy, and new research suggests it was a supernova that gave it the boot.
Read More »
Wet Mars: Red Planet Lost Ocean's Worth of Water, New Maps Reveal
Ancient Mars Ocean Water Illustration
March 5th, 2015
Ancient Mars likely once had an ocean large enough to cover 20 percent of the Martian surface, a fifth of the planet, scientists say. But over time, most of that water was lost to space.
Read More »
Cosmic Lens Reveals 4 Views of Same Star Explosion (Photo)
Four Images of the Same Supernova
March 5th, 2015
For the first time, a cosmic magnifying glass has allowed scientists to see the same star explosion four times, possibly offering a revealing glimpse into these explosive stellar deaths and the nature of the accelerating universe.
Read More »
Dawn Spacecraft's Arrival at Dwarf Planet Ceres: Full Coverage
NASA's Dawn spacecraft is due to arrive at the dwarf planet Ceres on March 6, 2015.
March 5th, 2015
A NASA spacecraft is expected make its historic arrival in orbit around the dwarf planet Ceres, marking the first time a human-made probe has visited the cosmic body in history.
Read More »
Rosetta Spacecraft Sees Its Shadow on a Comet (Photo)
Rosetta's Shadow on Comet 67P
March 5th, 2015
The European Space Agency's Rosetta spacecraft took the picture during a close flyby of Comet 67P/Churyumov-Gerasimenko on Feb. 14, when the sun, spacecraft and comet were all neatly aligned.
Read More »
General Relativity at 100: Einstein's Famous Theory Has Aged Well
NASA's Gravity Probe B
March 5th, 2015
The famous theory, which Einstein published in 1915, remains the bedrock upon which scientists' understanding of the origin and evolution of the universe rests.
Read More »
7 Strange Facts About Dwarf Planet Ceres
Dwarf Planet Ceres
March 5th, 2015
While NASA's Dawn probe will soon begin the first in-depth examination of Ceres, astronomers have learned a bit about the dwarf planet already. Here are seven weird facts about Ceres.
Read More »