Our galaxy is 10 billion years old. The Earth is only 4.5 billion years old. We are a firefly flicker in the… — Geoffrey Marcy Earth Copy Share Image
What fraction of the twinkling lights you see at night have Earths? — Geoffrey Marcy Earth Copy Share Image
In the next century or two, we humans will have planet-finder telescopes that span our solar system with mirrors strewn from here… — Geoffrey Marcy Aliens Copy Share Image
I'm at a funny crossroads, personally. I really want to turn my attention away from planet-hunting towards Search for Extra-Terrestrial Intelligence (SETI)… — Geoffrey Marcy Attention Copy Share Image
A major puzzle for which nobody has an answer is this: is there some size at which the planets change their nature… — Geoffrey Marcy Composition Copy Share Image
