| 41. | But space instruments are being designed to look for smaller, terrestrial planets in orbits more like Earth's.
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| 42. | Near the star, the planetary embryos go through a stage of violent mergers, producing a few terrestrial planets.
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| 43. | In a quarter of the simulation Planet V was ejected or impacted the Sun without other terrestrial planets suffering collisions.
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| 44. | The D / H isotopic ratio is a primary constraint on the source of H 2 O of terrestrial planets.
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| 45. | He also made significant contributions to the study of HED meteorites and studied the origin of water in terrestrial planets.
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| 46. | The second step, to be taken in about 10 years, would be a mission called the Terrestrial Planet Finder.
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| 47. | The big bullies may wipe clean the terrestrial planets in those planetary systems, rendering them void of any Earth analogs.
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| 48. | "Right now, we are paying to people to think about terrestrial planet finders, " he said.
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| 49. | It is estimated that 50 60 % of binary systems are capable of supporting habitable terrestrial planets within stable orbital ranges.
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| 50. | Examples are mountains, hills, polar caps, and valleys, which are found on all of the terrestrial planets.
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