Leonid meteors might have final flare-up Tuesday morning!

Time to look is between 12:30 a.m. and 3 a.m. EST on November 20. That's 5:30 to 8 UTC on November 20. Link for watching online in this post.

How to watch today’s solar eclipse online

Need a web cam for the November 13-14, 2012 total solar eclipse? Check out these links to online viewing.

Why does the sun shine?

The sun generates about 400 billion billion megawatts of power and it has done so for five billion years. Nuclear fusion - combining lighter atoms to make heavier one - is what makes it possible.

What is a black hole?

Black holes are the remnants of very massive stars with gravity so strong that not even light can escape.

A black hole in the Orion Nebula?

An international team of astrophysicists says the famous Orion Nebula has a black hole at its heart, whose mass is some 200 times the mass of our sun.

Paintballs could be used to deflect asteroid from collision course

An MIT grad student says that paintballs could deflect an asteroid away from a collision course with Earth. But the process would take time.

Comet Hergenrother is splitting apart

Astronomers have been watching a faint comet - Comet Hergenrother - in hopes it would put on a good show. Now it appears the comet is breaking to pieces.

Andromeda Galaxy as Local Group’s resident bully

Andromeda will collide with our MIlky Way in 4 billion years. It had a close encounter with another Local Group galaxy long ago. Yeah, Andromeda. You're tough.

Whoa! Earth-size planet in Alpha Centauri system

Scientists have found a planet orbiting the closest star system to Earth, only 4.3 light-years away.

Video: Spectacular view of Milky Way in time lapse

It's a test video for a future IMAX film, from astrophotographer Colin Legg in Australia, where the Milky Way can be seen in all its glory. Awesome!