News

  1. Astronomy

    Young stars shed light on young sun

    If our own sun had been as active in its youth as is a group of young sunlike stars recently observed with the Chandra X-ray Observatory, it could account for the abundance of several isotopes, such as aluminum-26, calcium-41, and beryllium-10 found in meteorites.

    By Ron Cowen
  2. Astronomy

    Asteroid studies reveal new puzzles

    Belying the image of an asteroid as a bare rock, a detailed study of the asteroid 433 Eros reveals that many of its crater floors and depressions are coated with fine dust and nearly half of the largest rocks strewn across the asteroid's surface represent material blasted from a single crater.

    By Ron Cowen
  3. Astronomy

    Moon plume breaks the record

    The Galileo spacecraft has found the tallest plume seen so far on Jupiter's moon Io, the only volcanically active moon known in the solar system.