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The Mystery of Coronal Heating Poster 1
Sun
Nov 30, 2016
Observations by NASA's IRIS spacecraft suggest that "heat bombs" are going off in the sun's outer atmosphere, helping to explain why the solar corona is so mysteriously hot.
Universe
Aug 26, 2014
August 26, 2014:  Once every 50 years, more or less, a massive star explodes somewhere in the Milky Way.  The resulting blast is terrifyingly powerful, pumping out more energy in a split second than the sun emits in a million years.  At its peak, a supernova can outshine the entire Milky Way... Read More
Solar System
Aug 25, 2014
August 25, 2014:  NASA’s Pluto-bound New Horizons spacecraft has traversed the orbit of Neptune. This is its last major crossing en route to becoming the first probe to make a close encounter with distant Pluto on July 14, 2015.
Universe
Aug 25, 2014
A NASA sounding rocket has confirmed that the solar system is inside an ancient supernova remnant. Life on Earth survived despite the nearby blasts.
ScienceCasts: Evidence for Supernovas Near Earth
Universe
Aug 18, 2014
August 18, 2014:  Barely 30 years ago, the only planets astronomers had found were located right here in our own solar system.  The Milky Way is chock-full of stars, millions of them similar to our own sun.  Yet the tally of known worlds in other star systems was exactly zero. What a difference a... Read More
Universe
Aug 18, 2014
Astronomers are not only discovering planets around distant suns, they are also starting to measure those worlds with astonishing precision. The diameter of a super-Earth named Kepler 93B is now known to within an accuracy of 148 miles.
ScienceCasts: Sizing up an Exoplanet
Universe, Sun, Solar System
Aug 15, 2014
August 15, 2014:  Sleeping late is one of the simple pleasures of summer vacation.  This week, waking up early will be a pleasure, too.
Universe
Aug 15, 2014
Wake up early in mid-August to see Venus and Jupiter shining side-by-side.
ScienceCasts: Beautiful Conjunction
Solar System
Aug 12, 2014
August 12, 2014:  On October 19, 2014, Comet Siding Spring will pass by Mars only 139,500 km away--which would be like a comet passing about 1/3 of the distance between Earth and the Moon. The nucleus of the comet won't hit Mars, but there could be a different kind of collision. "We hope to... Read More
Solar System
Aug 6, 2014
Comet Siding Spring is about to fly historically close to Mars. The encounter could spark Martian auroras, a meteor shower, and other unpredictable effects. Whatever happens, NASA's fleet of Mars satellites will have a ringside seat.
ScienceCasts: Mars vs Comet Siding Spring
Universe
Aug 6, 2014
August 6, 2014:  Today, after a decade-long journey chasing its target, the European Space Agency's Rosetta probe, carrying three NASA instruments, became the first spacecraft to rendezvous with a comet, 67P/Churyumov-Gerasimenko. "After 10 years, five months and four days... Read More
Universe
Aug 2, 2014
This news release is reprinted courtesy of the European Space Agency, which is leading the Rosetta mission to Comet 67P.
Sun, Solar System
Jul 28, 2014
July 28, 2014:  Every year, sky watchers and summertime campers circle on their calendars a few key August nights—the 11th, 12th and 13th.  These are the dates of the annual Perseid meteor shower, which rarely fails to please those who see it.This year they're adding a note: "supermoon."During the... Read More
Solar System
Jul 28, 2014
Which is brighter--a flurry of Perseid fireballs or a supermoon? Sky watchers will find out this August when the biggest and brightest full Moon of 2014 arrives just in time for the peak of the annual Perseid meteor shower.
ScienceCasts: Perseid Meteors vs the Supermoon
Solar System
Jul 28, 2014
July 28, 2014: NASA's Opportunity Mars rover, which landed on the Red Planet in 2004, now holds the off-Earth roving distance record after accruing 25 miles (40 kilometers) of driving, and is not far from completing the first extraterrestrial marathon. The previous record was held by the Soviet... Read More