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A camera on the Mars Reconnaissance Orbiter snapped this mosaic of images of the 55-kilometer-wide Mojave Crater. The impact that created the crater may have ejected many of the Martian meteorites now found on Earth.

Image courtesy of Science/AAAS

Galaxy ESO 137-011

STAR RIVERS  The galaxy ESO 137-001, 200 million light-years away, leaves  trails (shown in blue in this false-color Hubble Space Telescope image) of gas and newly born stars as it plows through the Norma Cluster. Bright stars in the foreground sit within our galaxy.

Ming Sun/UAH, Serge Meunier, NASA, ESA

Asteroid P/2013 R3 is shown breaking apart in this Hubble Space Telescope image taken October 29, 2013.

D. Jewitt/UCLA, HST/NASA, ESA

  • Astronomy

  • Cosmology

    
    Science Ticker

    New supernova spotted in nearby galaxy

    The galaxy M82 has given off a brilliant flash, which astronomers have confirmed as a type 1a supernova.

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  • Planetary Science

    
    Science Ticker

    Mojave Crater may be source of many Martian meteorites

    Many of the roughly 150 Martian meteorites found on Earth probably came from the Mojave Crater on Mars.

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    Science Ticker

    Asteroid disintegrates while spinning too fast

    Asteroid P/2013 R3 is shattering into a cloud of debris in these images captured by the Hubble Space Telescope.

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  • Particle Physics

    Reviews & Previews

    Catching Particle Fever

    Interspersed with the plot of Particle Fever are artful explanatory animations and commentary by six articulate physicists. Through these characters, we learn that the Higgs is a stepping stone toward a deeper understanding of the universe.
    
    Science Ticker

    More precision added to mass estimate of electron

    The electron has been weighed with unprecedented precision. Its new and improved mass is 17 times as precise as the previous best estimate.

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  • Exoplanets

    
    Science Ticker

    Kepler data confirm 715 new exoplanets

    The population of planets outside the solar system has grown by about 70 percent, thanks to discoveries culled from Kepler space telescope data. Researchers are announcing 715 new confirmed planets in a February 26 press conference.

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  • Astrobiology

    People

    Exploring Earth's alien spaces

    Nathalie Cabrol, a planetary geologist and astrobiologist at the SETI Institute’s Carl Sagan Center and NASA’s Ames Research Center, both in Mountain View, Calif., hunts for alien life.
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