• Ceres imaged from the lowest orbital altitude ever

    NASA's Dawn spacecraft collected new detailed images of the cratered and fractured southern hemisphere surface of the dwarf planet Ceres on December 10, 2015. The spacecraft took the images while cruising in the lowest and final orbit of the small planet. Dawn…

  • Giant comets pose a much greater hazard to life than asteroids

    The discovery of hundreds of giant comets in the outer planetary system over the last two decades means that these objects pose a much greater hazard to life than asteroids, a team of astronomers from Armagh Observatory and the University of Buckingham report. The…

  • Cassini makes final close flyby images of Saturn’s moon Enceladus

    NASA's Cassini spacecraft made its 22nd and the final close flyby of Saturn's moon Enceladus on December 19, 2015 at 17:49 UTC and will now continue to observe the moon from a much greater distance. The spacecraft passed Enceladus at a distance of 4 999 km…

  • 10-m wide asteroid makes a very close call with Earth

    A newly discovered asteroid, about 10-meters (34 feet) wide, flew past Earth well withing the orbit of the Moon on December 19, 2015. After a much bigger, 650-meter (0.33 miles) wide asteroid that flew past Earth at about 1.3 LD on October 31, this is the second…

  • The force of meteoroid strikes on lunar exosphere

    NASA scientists have discovered new properties of the Moon's exosphere – a thin layer of gas surrounding the Moon that's about 25-trillionth the density of Earth’s atmosphere. Their data reveals that meteoroids cause an increase in two key elements in…

  • Blazar bonanza

    A long time ago in a galaxy half the universe away, a flood of high-energy gamma rays began its journey to Earth. When they arrived in April, NASA's Fermi Gamma-ray Space Telescope caught the outburst, which helped two ground-based gamma-ray observatories detect…

  • A funky star shows long-lasting cloud storms possible

    A raging storm, similar to the Jupiter's Great Red Spot, discovered by NASA's Kepler and Spitzer space telescopes has been pictured in a vivid artist's animation video. The star named W1906+40, located approximately 53 light years away in the Lyra…