A Galactic Lesson in Quality
Every spot in the photo below is a galaxy, not a star. Each of them contains perhaps 100 billion stars, and along with them, probably hundreds of billions of planets.
Probability Limits
Author clarification--3/5/2015:
Every spot in the photo below is a galaxy, not a star. Each of them contains perhaps 100 billion stars, and along with them, probably hundreds of billions of planets.
Author clarification--3/5/2015:
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