Latest articles by Tony Phillips
Neil Armstrong and Buzz Aldrin were supposed to sleep prior to liftoff. But how could they?
A puzzling surplus of high-energy electrons is bombarding Earth from space.
NASA astronomers have observed the Moon flashing a hundred times.
NASA scientists capture strange sunspot activity on magnetogram.
A scientist says he has figured out a way to forecast solar storms up to one hour before they strike Earth.
Something remarkable is about to happen in the evening sky. Three planets and a star cluster are converging for a close encounter you won't want to miss.
The Sun's Great Conveyor Belt has slowed to a record-low crawl, with important repercussions for future solar activity.
Astronomers will soon get a second chance to view a comet that broke apart in 1995.
Backyard astronomers, grab your telescopes. Jupiter is growing a new red spot.
One of the strangest satellites in the history of the space age is about to go into orbit. Launch date: Feb. 3.
NASA's Gravity Probe B spacecraft has gathered all the data physicists need to check a bizarre prediction of Einstein's relativity.
They both resonate. That's good for a guitar, bad for a rocket. Learn more.
Earth is orbiting through a swarm of space debris that may be producing an unusual number of nighttime fireballs.
Mars won't be as big as the full Moon. But it will be a nice skywatching target later this year.
The largest proton storm in years bathed the Moon in radiation. With no atmosphere, it's a dangerous place for astronauts.
