Astronomy | featured news

New evidence supports the theory that comets delivered a significant portion of Earth' s oceans, which scientists believe formed about 8 million years after the planet itself.

Scientists discover that Venus has an ozone layer high its its atmosphere, overturning the long-held view that it did not.

A small asteroid zipped by Earth well inside the orbit of the moon on Friday, marking the second known space-rock encounter for our planet over the past week, NASA said.

China launches its first experimental module for a future space station, the Associated Press reports.

After days of seeming uncertainty, official satellite-watchers announced Tuesday that a dead NASA satellite broke up over the South Pacific, about as far away from large land masses as you can get.

Warming up on its solar cycle, the sun uncorked a a strong solar storm that reached Earth on Monday, federal scientists said, posing a threat to satellites and radio communications, although no interruptions had been reported to date.

A six-ton NASA science satellite crashed to Earth on Saturday, leaving a mystery about where a ton of space debris may have landed.

NASA's dead six-ton satellite fell to Earth early Saturday morning, starting its fiery death plunge somewhere over the vast Pacific Ocean....

Friday appears to be re-entry day for NASA’s falling UARS satellite — a school-bus size spacecraft that will shoot its way into Earth’s atmosphere. NASA, the U.S. military and amateur astronomers are now able to say it won't come down over North America.

Scientists’ predictions of the formation and characteristics of dark matter are shaken by research into dwarf galaxies surrounding the Milky Way.