Study Notes, Data, Statistics on Planets, Astronomical Beings, the Greenhouse Effect
* a newly proposed Exo-Earth Imager (EEI) could show astronomers an Amazon-size forest, with its green hint of biology, on an Earth-size planet 30 light years away.
*It's a bold promise, considering that NASA and the European Space Agency are still a dozen years away from even attempting a Terrestrial Planet Finder (TPF) that could barely see such worlds as tiny specks.
*One NASA concept envisions a spaceborne array of 20 telescopes, each 26 feet in diameter separated by as much as 3,700 miles in space.
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