Is Earth All By Its Lonesome? Kepler Finds Four,034 Possible Partners

In the end, they almost ran out of room on the list, Dr. Batalha recalled, which wound up running to 9,000.
“We had to live with what we got,” Dr. Batalha said.
Or, as Dr. Batalha said, “We’re not stamp collecting, we’re doing statistics.”Another result reported on Monday deepened a mystery about how nature goes about making planets.
“With this catalog, we are turning from individual planets to trying to understand the demographics of these worlds, which are similar to Earth,” Dr. Thompson said.
(Neptune itself is four times the diameter and 17 times the mass of Earth.

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