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  1. ScienceCasts: Two Comets to Fly By Mercury on Nov 18 & 19

    03:48

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    Visit http://science.nasa.gov/science-news/science-at-nasa/2013/15nov_twocomets/ for more! Consider it a cosmic coincidence: On Nov. 18-19, two comets (ISON and Encke) are going to fly by the planet…

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    • ScienceCasts: What Happened to Mars? A Planetary Mystery

      04:29

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      Visit http://science.nasa.gov/science-news/science-at-nasa/2013/12nov_maven/ for more! Mars was once on track to become a thriving Earth-like planet, yet today it is an apparently lifeless wasteland.…

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      • ScienceCasts: The Sounds of Interstellar Space

        04:36

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        Visit http://science.nasa.gov/science-news/science-at-nasa/2013/01nov_ismsounds/ for more! As Voyager 1 recedes from the solar system, researchers are listening for "interstellar music"…

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        • ScienceCasts: The Effects of Space Weather on Aviation

          04:10

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          Visit http://science.nasa.gov/science-news/science-at-nasa/2013/25oct_aviationswx/ for more! Astronauts aren't the only ones who need to worry about solar flares. Ordinary air travelers can…

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          • ScienceCasts: Amateur Astonomers See Comet ISON Approaching the Sun

            04:05

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            For more, visit http://science.nasa.gov/science-news/science-at-nasa/2013/24sep_ison2/ To learn how you can help, visit isoncampaign.org Comet ISON is still more than two months away from its…

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            • ScienceCasts: The Harvest Moon

              02:48

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              Visit http://science.nasa.gov/ for breaking science news. The full Moon closest to the northern autumnal equinox is coming this week. Don't miss the Harvest Moon.

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              • ScienceCasts: ISS "Firestation" to Explore the Tops of Thunderstorms

                03:53

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                Visit http://science.nasa.gov/ for breaking science news. Sometimes, Earth mimics a supernova, producing a Terrestrial Gamma-ray Flash from the tops of thunderstorms. A new lightning sensor on…

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                • ScienceCasts: NASA Mission Seeks Lunar Air

                  04:02

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                  Visit http://science.nasa.gov/ for breaking science news. A NASA spacecraft slated for launch in September will fly to the Moon to investigate the tenuous lunar atmosphere. Researchers hope "LADEE"…

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                  • “ScienceCasts: Comet ISON to Fly By Mars”

                    03:40

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                    Visit science.nasa.gov/ for breaking science news. Comet ISON is heading for a Thanksgiving Day brush with the sun, but first it's going to pay a visit to Mars. In this week's ScienceCast,…

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                    • ScienceCasts: The Strange Attraction of Hot Jupiters

                      04:25

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                      Visit http://science.nasa.gov/ for breaking science news. An exotic class of exoplanets called "hot Jupiters" are even weirder than astronomers imagined. While these worlds may have…

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                      • ScienceCasts: The Sun's Magnetic Field is About to Flip

                        04:03

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                        Visit http://science.nasa.gov/science-news/science-at-nasa/2013/05aug_fieldflip/ for more! Something big is happening on the sun. The sun's global magnetic field is about to flip, a sign…

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                        • ScienceCasts: Perseid Fireballs

                          03:06

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                          Visit http://science.nasa.gov/ for breaking science news. New research from NASA's Meteoroid Environment Office identifies the Perseids as the "fireball champion" of annual meteor…

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