March 12, 2013
An analysis of a rock sample collected by NASA's Curiosity rover shows ancient Mars could have supported living microbes.
Feb. 8, 2013
The planet Mercury is about to make its best apparition of the year for backyard sky watchers. Look west at sunset for a piercing pink planet surrounded by twilight blue.
April 24, 2013
Saturn and Earth are having a close encounter. See the ringed planet at its best and brightest on April 28th.
March 1, 2013
Something unexpected is happening on the sun. 2013 is supposed to be the year of Solar Max, but solar activity is much lower than expected. At least one leading forecaster expects the sun to rebound with a double-peaked maximum later this year.
Jan. 8, 2013
A new report issued by the National Research Council (NRC), "The Effects of Solar Variability on Earth's Climate," lays out some of the surprisingly complex ways that solar activity can make itself felt on our planet.
March 8, 2013
Using data from an aging NASA spacecraft, researchers have found signs of an energy source in the solar wind that has caught the attention of fusion researchers.
Oct. 31, 2013
Ten years after the original Halloween Storms, the sun is putting on a repeat performance--albeit not nearly so scary.
Nov. 13, 2013
NASA has released a natural-color image of Saturn from space, the first in which Saturn, its moons and rings, and Earth, Venus and Mars, all are visible.
June 18, 2013
Researchers experimenting with flames onboard the International Space Station have produced a strange, cool-burning form of fire that could help improve the efficiency of auto engines.
March 15, 2013
Comet Pan-STARRS has survived its encounter with the sun and is now emerging from twilight in the sunset skies of the northern hemisphere. A NASA spacecraft has beamed back spectacular pictures of a "wild and ragged" tail behind the comet's active nucleus.