Ken Croswell

Ken Croswell has a Ph.D. in astronomy from Harvard University and is the author of eight books, including The Alchemy of the Heavens: Searching for Meaning in the Milky Way and The Lives of Stars.

All Stories by Ken Croswell

  1. Milky Way

    Astronomers have found the edge of the Milky Way at last

    Computer simulations and observations of nearby galaxies let astrophysicists put a firm number on the Milky Way's size.

  2. Quasar Markarian 231

    Molecular oxygen has been spotted beyond the Milky Way for the first time

    Astronomers have detected molecular oxygen in another galaxy for the first time. The discovery is only the third sighting beyond our solar system.