Turns out our solar system â with its medium sized sun, its four small rocky planets, its four big gassy ones farther out â isn’t like the others. We are unusual. Very unusual. Says one prominent astronomer, we are “a bit of a freak.”
Meantime, he is trying to get used to the idea that we live on an unusual planet in an unusual solar system. That’s two “unusuals.” One more than he’s used to. To live doubly-unusual, is to be luckier — and perhaps rarer — than we knew.