Nov. 15, 2013
Consider it a cosmic coincidence: On Nov. 18-19, two comets (ISON and Encke) are going to fly by the planet Mercury in quick succession. NASA's MESSENGER spacecraft will have a front-row seat for the rare double flyby.
March 21, 2013
The European Space Agency's Planck spacecraft has released the most detailed map ever made of the oldest light in the universe, revealing new information about its age, contents and origins.
Feb. 28, 2013
Earth's radiation belts were one of the first discoveries of the Space Age. A new finding published in today's issue of Science shows that we still have much to learn about them. NASA's twin Van Allen Probes, launched just last August, have revealed a previously unknown third radiation belt around Earth.
June 27, 2013
Three new papers published in today's issue of Science suggest that Voyager 1, now more than 18 billion kilometers from the sun, is closer to becoming the first human-made object to reach interstellar space.
Sept. 12, 2013
In a surprising turn of events, researchers have realized that Voyager 1 left the solar system a year ago. This event sets in motion a new era of exploration of the realm between the stars.
Sept. 16, 2013
The full Moon closest to the northern autumnal equinox is coming this week. Don't miss the Harvest Moon.
Feb. 26, 2013
Two weeks after an asteroid exploded over Russia's Ural mountains, scientists are making progress understanding the origin and make-up of the unexpected space rock. This week's ScienceCast presents their latest results.
Dec. 4, 2013
In full view of the NASA-ESA solar physics fleet, Comet ISON disintegrated when it flew through the sun's atmosphere on Thanksgiving Day. Researchers are still marveling at the images and the scientific data they contain.
Nov. 12, 2013
Mars was once on track to become a thriving Earth-like planet, yet today it is an apparently lifeless wasteland. A NASA spacecraft named MAVEN will soon journey to Mars to find out what went wrong on the Red Planet.