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NASA ScienceCasts Narrators

Two Sides of the Same Star Poster
Universe, Stars
May 30, 2018
A neutron star comes from a large star that has run out of fuel, and exploded as a supernova. First it becomes a radio pulsar and later becomes a magnetar. Or maybe it’s the other way around!
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
Aug 15, 2014
Wake up early in mid-August to see Venus and Jupiter shining side-by-side.
ScienceCasts: Beautiful Conjunction
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.
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... 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: "... Read More
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
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
Earth, Solar System
Jul 27, 2014
July 27, 2014:  Scientists using mission data from NASA’s Cassini spacecraft have identified 101 distinct geysers erupting on Saturn’s icy moon Enceladus.  Their analysis suggests it is possible for liquid water to reach from the moon’s underground sea all... Read More
Universe
Jul 24, 2014
July 24, 2014:  The Universe is a big place, full of unknowns.  Astronomers using NASA's Chandra X-ray Observatory have just catalogued a new one. "I couldn't believe my eyes," says Esra Bulbul of the Harvard Center for Astrophysics.  "What we found, at... Read More
Universe
Jul 24, 2014
July 24, 2014: As the European Space Agency's Rosetta probe approaches Comet 67P/Churyumov-Gerasimenko (67P) for an August rendezvous, the comet's core is coming into sharper focus. Today, ESA released a new set of images and a striking 3D model of 67P's nucleus.
Sun
Jul 23, 2014
July 23, 2014: If an asteroid big enough to knock modern civilization back to the 18th century appeared out of deep space and buzzed the Earth-Moon system, the near-miss would be instant worldwide headline news. Two years ago, Earth experienced a close shave just as perilous, but most newspapers... Read More