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.
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When Opportunity left Earth in 2003, many observers expected the rover to survive no more than a few months on the hostile surface of Mars. 10 years later, Opportunity is still going strong and could be poised to make its biggest discoveries yet at a place named Solander Point.
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.
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.
"Rock Comet" 3200 Phaethon has sprouted a tail, proving that the mysterious object is the source of the annual Geminid meteor shower.
Eight years after it left Earth, NASA's New Horizons spacecraft is approaching Pluto. The encounter begins less than a year from now.
A total lunar eclipse on April 15th marks the beginning of a remarkable series of eclipses all visible from North America.
Earth and Mars are converging for a close encounter in April, an event astronomers call "the opposition of Mars."
Sky watchers in North America could witness a new meteor shower on May 24th when, for the first time, Earth passes through a cloud of dust from periodic comet 209P/LINEAR.
Later this year, Europe's Rosetta probe will orbit and land on comet 67P/ChuryumovâGerasimenko. New images of the comet show that it will be a lively place when Rosetta arrives.