Assertion: terrestrial planet | /r/HasProperty | origin of the solar system
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Source sentences:
text: Their topics are here and now, user's guide to the sky: patterns and cycles, the origin of modern astronomy, light and telescopes, Sun light and Sun atoms, the terrestrial planets , the outer solar system, origin of the solar system and extra-solar planets, the family of stars, the structure and formation of stars, the deaths of stars, the Milky Way galaxy, galaxies: normal and active, modern cosmology, and life on other worlds.