Cosmogony: New Twist for an Old Theory

New Twist for an Old Theory

Although the moon has lately been giving up many of its ancient secrets to prying spacecraft, it has clung stubbornly to one—the genesis of its own existence as an earth satellite. With monotonous regularity, scientists have punched holes in theories that the moon was torn, Eve-like, from the earth's side; that the earth and moon condensed simultaneously, as neighbors, from the same blob of primordial dust; or that the moon was a planetary interloper accidentally captured by the earth's gravity. Says Nobel Laureate Chemist Harold Urey:...

Want the full story?

Subscribe Now

Subscribe
Subscribe

Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on TIME.com

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!