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.
Nov. 14, 2013
Comet ISON is plunging toward the sun for a perilous pass through the solar atmosphere on Thanksgiving (Nov. 28th). In today's story from Science@NASA, a leading expert lays out some possible outcomes for the sundiving comet--from premature disintegration to spectacular survival.
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.
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.
Nov. 7, 2013
The Hubble Space Telescope has spotted a strange asteroid spewing six comet-like tails of dust. This could be a sign that the asteroid is breaking apart.
Nov. 1, 2013
As Voyager 1 recedes from the solar system, researchers are listening for "interstellar music" to learn more about conditions outside the heliosphere.
Oct. 31, 2013
Ten years after the original Halloween Storms, the sun is putting on a repeat performance--albeit not nearly so scary.
Oct. 25, 2013
Astronauts aren't the only ones who need to worry about solar flares. High-latitude air travelers can also be exposed to significant doses of radiation during solar storms. A new computer model developed by NASA aims to help protect the public by predicting space weather hazards to aviation.
Sept. 24, 2013
Comet ISON is still more than two months away from its spectacular close encounter with the sun. Already, the brightening comet has become a good target for backyard telescopes in the pre-dawn sky.
Sept. 16, 2013
The full Moon closest to the northern autumnal equinox is coming this week. Don't miss the Harvest Moon.