I'm at a funny crossroads, personally. I really want to turn my attention away from planet-hunting towards Search for Extra-Terrestrial Intelligence ….

In the next century or two, we humans will have planet-finder telescopes that span our solar system with mirrors strewn from here to Jupiter, giving ….

A major puzzle for which nobody has an answer is this: is there some size at which the planets change their nature from water-rich planets like Neptu….

What fraction of the twinkling lights you see at night have Earths?.

Our galaxy is 10 billion years old. The Earth is only 4.5 billion years old. We are a firefly flicker in the great astrobiology of the galaxy..