In about thirty years we have gone from knowing of no planets beyond the Sun to confirming more than 6,000, and the biggest surprise is that the most common type of planet in the galaxy is one our own solar system does not contain

The galaxy is ruled by a type of world we've never seen up close—and it's forcing us to rethink how planetary systems form. The post In about thirty years we have gone from knowing of no planets beyond the Sun to confirming more than 6,000, and the biggest su…