Charles Petit

All Stories by Charles Petit

  1. Physics

    Invisibility Uncloaked

  2. Astronomy

    The Star That Ate a Mars

    COVER STORY: Scientists probe debris trapped by white dwarfs to learn more about what faraway Earthlike planets are made of.

  3. Cold Panacea

    It was like the cavalry had shown up. Twenty years ago, newspapers and broadcasters burst with news from the campus of the University of Utah in Salt Lake City delivering what seemed a miracle. Its name was cold fusion. Its lure was simple: inexhaustible, clean and affordable energy. A news conference is not a very […]

  4. Astronomy

    Ultramassive: as big as it gets

    Normal 0 false false false MicrosoftInternetExplorer4 If asked to name stupendously amazing things in space, most people would probably pick black holes. These evil-tinged clowns of the universe are definite wows. Insatiable is their middle name. BLACK HOLE TAXONOMY | Click to enlarge for a primer on black hole taxonomy. Design: J. Korenblat ULTRAMASSIVE | […]

  5. Space

    Black holes have limits

    A review of current evidence suggests an upper limit to a black hole's size.