Another worlds

Over 200 planets have been discovered outside Solar System1): most of them are gas giants like Jupiter.

How many planets are inhabitated by intelligent beings?

One of them has following features:

Do you know what that planet is?

If not, look out of the window!

1)    First of them was discovered by Alexander Wolszczan, see for example
Wolszczan A,   Confirmation of Earth-mass planets orbiting the millisecond pulsar PSR B1257+12
    Science 264 (5158): 538-542 APR 22 1994