A humongous sunspot — the biggest one seen since 1990 — produced no aurora-causing events despite firing off 10 intense solar flares in less than two weeks last month, scientists say.
Viewers throughout most of the United States are in position to see a partial solar eclipse Thursday afternoon (Oct.23).
Mark Thursday (Oct. 23) on your calendar as "Solar Eclipse Day," for if the weather cooperates, you should have no difficulty observing a partial eclipse of the sun.
A black hole is eating a star faster than scientists had thought was possible, and it's unleashing unusually bright X-ray signals that may help scientists understand a group of weird, superbright...
Twelve years ago, a U.S. military rescue mission in Afghanistan went horribly wrong. A Chinook helicopter carrying U.S. troops failed to receive a crucial radio message and was shot down over the...
A strong solar flare is blasting its way to Earth, but the worst of its power looks like it will barely skim above the planet and not cause many problems.
On July 26, NASA’s Solar Dynamics Observatory (SDO) noticed something peculiar about its normally uninterrupted view of the sun — a chunk was missing.
Our understanding about the universe and our place in it has changed over time.