News

  1. Astronomy

    Gravity’s lens: Finding a sextet of images

    Astronomers have for the first time found a gravitational lens in which the image of a distant galaxy has been split into six distinct images.

    By Ron Cowen
  2. Astronomy

    Gravity’s lens: Finding a dim cluster

    Relying solely on a gravitational mirage rather than visible images, astronomers have discovered a previously unknown cluster of galaxies and measured its distance from Earth.

    By Ron Cowen

  3. Youthful nicotine addiction may be growing

    Although the rate of daily cigarette smoking has declined among teenagers and young adults over the past 20 years, the number of smokers in this age range who develop nicotine dependence has risen dramatically.