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" ... Again, not every extrasolar planet we see would be able to detect the Earth (or, say, Jupiter) via a transit. Our solar system would need to be perfectly aligned so that the alien astronomers could view it edge-on. ... "
" ... Artist’s conception of the extrasolar ring system circling the young giant planet or brown dwarf ... [+] J1407b. Worlds with extraordinary ringed systems can produce large flux dips when they transit, but Cassini's data from Saturn indicates that these ringed systems might be short-lived compared to the lifetime of a solar system. ... "
" ... Because planets in such red giant systems would be inherently old, this would mean that astronomers could expand the search for extrasolar planets to much older planetary systems. That is, systems that might have long ago developed surface life of some sort. ... "
" ... Carroll and colleagues’ illustrations provides context for the last 30 years of extrasolar planet-hunting and the new field of astrobiology. And although the accompanying text covers much of the same territory as previous works on the subject, the book offers a succinct introduction for those wholly unfamiliar with the subject. ... "
" ... The first extrasolar planets were discovered using Arecibo in 1992. ... "