Uncategorized

  1. Astronomy

    X-ray telescope vanishes

    Astro-E, a Japanese X-ray observatory, fell back to Earth and burned up just after launch on Feb. 9.

    By Ron Cowen
  2. Planetary Science

    Unveiling Mars’ watery secret

    A new gravity map of Mars has revealed a network of buried channels that billions of years ago may have been on the surface and helped carry water to fill an ancient ocean.

    By Ron Cowen
  3. Astronomy

    Craft spies new class of gamma-ray sources

    Roughly half the 120 unidentified sources of high-energy gamma-ray emissions in the Milky Way—those at midgalactic latitudes—may comprise a new class of objects and originate from a belt of massive stars that lies only a few hundred light-years from the solar system.