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NASA’s 3-minute solar cycle primer
NASA's solar cycle primer illuminates mysteries of the sun.
January 6, 2013
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.
December 21, 2012
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?
December 21, 2012
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.
December 20, 2012
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.
December 19, 2012
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?
December 19, 2012
This date in science: Apollo 17 returns with orange soil
On December 19, 1972, the Apollo 17 crew returned to Earth, completing the final manned moon mission. Their cargo included orange soil they unexpectedly found on the moon.
December 19, 2012
The aurora borealis and the coming Solar Maximum
Right now, there's huge excitement among those of us who hunt for the aurora borealis, also called the northern lights.
December 18, 2012
GRAIL moon probes’ crash site named for astronaut Sally Ride
The two GRAIL spacecraft hit the lunar surface at planned at 4:28 CST (2228 UTC) and 4:29 CST, at a speed of 3,760 mph (1.7 kilometers per second).
December 17, 2012
Estimate suggests Milky Way mass of 1.6 trillion suns
New estimate of Milky Way mass doesn't mean our galaxy has 1.6 trillion stars. It includes the mass of the dark matter halo thought to surround our Milky Way.
December 17, 2012
