たいようけいがいわくせい
太陽系外惑星
1. extrasolar planet; exoplanet
2. Extrasolar planetAn extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of 770 such planets have been identified as of May 30, 2012. Estimates of the frequency of systems strongly suggest that more than 50% of Sun-like stars harbor at least one planet. In a 2012 study, each star of the 100 billion or so in our Milky Way galaxy is estimated to host "on average ... at least 1.6 planets. " Accordingly, at least 160 billion star-bound planets may exist in the Milky Way Galaxy alone.
Read “Extrasolar planet” on English Wikipedia
Read “太陽系外惑星” on Japanese Wikipedia
Read “Extrasolar planet” on DBpedia
Read “Extrasolar planet” on English Wikipedia
Read “太陽系外惑星” on Japanese Wikipedia
Read “Extrasolar planet” on DBpedia
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