comets

  • mars_comet_siding_spring_945
    October 17, 2014  

    It’s only a matter of time before a big comet or asteroid is on a collision course with Earth. Will scientists discover it, and be able to do something about it, ahead of time? Science correspondent Miles O’Brien talks to NASA astronomers who troll for trouble in the sky. Continue reading

  • An artist rendition of the European Space Agency's Rosetta spacecraft approaching comet 67P/Churyumov-Gerasimenko. Photo courtesy of the ESA
    August 6, 2014  

    After a 10-year journey, the space probe Rosetta is orbiting a comet. The spacecraft is slated to follow the comet for more than a year on its way toward the sun. Hari Sreenivasan talks to Mark McCaughrean, senior scientific advisor of the European Space Agency, about sifting through a cosmic “garbage pile” in hopes of learning about the building blocks of life. Continue reading