Three such planets are included in the current "Looking at Earth" show at the National Air and Space Museum of the Smithsonian Institution in Washington.

The Discoveries Better Instruments For Better Data So, by the latest count, if the two pulsar planets are included, Dr. Adam Burrows of the University of Arizona said, "We now know of more planets outside the solar system than within."

Minor planets not yet given a name have not been included in this list.

The system is notable in many ways, most evidently from being only the second system containing planets of Earth's radius or smaller (after Kepler-20, whose terrestrial-sized planets are included in the picture to the left).

We think that probably this world-all these planets are included, but only the third has life forms advanced enough or even existing, to acknowledge their presence-was scouted by the Eldorn.

The second planet had considerably less atmosphere than Venus, and what there was included some oxygen.