Large sunspot region now facing Earth, might produce X-flare today

NOAA forecasters are also estimating a 30% to 45% chance of polar geomagnetic storms on January 17, 2013 when a CME is expected to hit Earth's magnetic field.

Curiosity rover on Mars poised to have its drilling debut

See what the Curiosity rover sees as it's poised on the edge of a possible first drilling site on Mars. It might start drilling a few days from now.

Video: Final footage before GRAIL moon mission crash landing

This final, breathtaking footage from the successful GRAIL moon mission was taken just six miles (10 kilometers) above the moon's surface on December 14, 2012.

Asteroid Apophis to sweep closely past Earth on January 9, 2013

At present, there's a remote chance that Apophis will strike us in 2036. It's expected to drop to zero after the early 2013 pass of Apophis near Earth.

Habitable zone around stars might be larger than we think

Could life survive on a world whose orbit around a distant sun was extremely oblong and eccentric? Such a world would have periods of extreme heat and cold.

NASA’s 3-minute solar cycle primer

NASA's solar cycle primer illuminates mysteries of the sun.

Asteroid 2011 AG5 will not collide with Earth in 2040

An asteroid you might not have known to worry about has been given the all-clear.

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?

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.

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.