Robert Roy Britt

Venus is so bright you can see it even in the daytime right now — if you know where to look.

The Perseid meteor shower and a rare planet alignment both occur this week.

A bright fireball streaks through the Phoenix sky, spotted fortuitously.

A new group of sunspots has produced moderate (M-class) solar flares, but forecasters say it could unleash a large (X-class) flare.

The biggest full moon of 2010 occurs tonight, Friday Jan. 29. What you can see and how best to view the moon.

The hole in the moon is likely a collapsed lava tube. It could provide shelter as a moon base.

Revelers can ring in the new year with a cosmic flourish tonight, celebrating the first New Year's Eve blue moon since 1990.

Some stars rely on vampirism to suck the life out of a companion star, while others are rejuvenated in cosmic collisions.

This year's annual Geminid meteor shower is expected to be a doozie, producing up to 140 "shooting stars" per hour.

Early Tuesday morning, a better-than-average shooting star show is expected.

On Sept. 2, 1859, an incredible storm of charged particles sent by the sun slammed into Earth's atmosphere, overpowered it, and caused havoc on the ground.

The star and its planet, WASP-17, are about 1,000 light-years away.

In North America, the best time to watch will be between midnight to 4:30 a.m. on Wednesday, Aug. 12.

In a celestial feat any magician would appreciate, Saturn will make its wide but thin ring system disappear from our view Aug. 11.

It has long been known that Galileo observed Neptune, but it was thought that he discounted the object as a star.

After one of the longest sunspot droughts in modern times, solar activity picked up quickly over the weekend.

New image of a gaseous space nebula reveals tens of thousands of giant comet-like knots raining down.

What caused a huge explosion over Siberia in 1908, flattening an area as big as a large city?

There is an increasingly somber feel of the photographs as Kaguya slides into darkness and demise, aiming at a landing site on an unlit part of the moon.

The Japanese lunar orbiter Kaguya has completed its main mission. But there's one final scientific endeavor.