★ Asteroid Belts of Just the Right Size are Friendly to Life
HubbleSite - NewsCenter - Asteroid Belts of Just the Right Size are Friendly to Life (11/01/2012) - IntroductionHubbleSite - NewsCenter - Asteroid Belts of Just the Right Size are Friendly to Life (11/01/2012) - Introduction
Asteroid Belts at Just the Right Place are Friendly to Life - NASA Spitzer Space Telescope