I’m dreaming of a white Christmas!

Congratulations! You survived the end of the world, and Christmas is around the corner. Time to focus on that popular question: will we have a white Christmas?

Did our solar system cross the galactic plane on December 21, 2012?

Did our solar system cross the plane of our Milky Way galaxy in 2012? Nah. That event is another 30 million years away.

Will the solar system planets align on December 21, 2012?

The image in this post shows the planets in our solar system on December 21, 2012. Do they look aligned to you?

Clays on Mars: More plentiful than expected

A new study indicates that clay minerals, rocks that usually form when water is present for long periods of time, cover a larger portion of Mars than previously thought.

Ultramassive black holes: How big can a black hole get?

A survey of 18 giant black holes shows that at least ten may weigh between 10 and 40 billion times the mass of the sun. Astronomers have dubbed these "ultramassive" black holes.

Temperature records from nature reaffirm climate warming

In a large compilation, scientists used used 173 independent datasets - from natural sources such as ocean sediments - to show warming over the past century.

From Cassini for the holidays: A splendor seldom seen

Just in time for the holidays, NASA's Cassini spacecraft, in orbit around Saturn for more than eight years now, has delivered another glorious, backlit view of the planet Saturn and its rings.

Astronomers identify stars in the Milky Way’s central bar

Our Milky Way is a barred spiral galaxy. Now astronomers say they have identified some individual stars making up the bar.

Is there a black hole in the center of our galaxy?

And if the Milky Way does have a central black hole, what's it doing there?

New dinosaur may be oldest by 10 million years

Working with fossils found in Tanzania, scientists have discovered what may be the oldest known dinosaur.