At precisely 1:14 a.m. on March 20, the sun passed directly over the equator, marking the vernal equinox and the start of spring...

Hooray! It's spring! On this day, March 20, 2012, the day and night are almost equally long as the sun passes over the equator in what's known as the vernal equinox ...

Having drawn closer and closer together and rendezvousing with the moon at the end of February, Venus and Jupiter, the two brightest objects in the sky, are putting on a show this ...

The geomagnetic storm unleashed by the sun’s coronal mass ejections (CME) of a few days ago was helping Mother Earth celebrate International Women’s Day on Thursday afternoon March...

The sun has unleashed a solar flare of the magnitude that glanced off Earth’s northern magnetic pole in late January, NASA scientists say—only this one is headed straight toward us...

Well, it's the warrior planet, so it won't get too, too friendly...

It’s Leap Year Day, February 29, giving some people an elusive birthday and others the chance to ask their beau for a ring...

It took 25,000 supercomputer processors and 11 days to calculate the motions of 180 billion simulated electromagnetic particles in space...

It has been hard to miss: All week we’ve seen Venus and Jupiter, the two brightest objects in the sky this week, edge closer and closer together...