giant impact theory

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giant impact theory (j

nt)

A theory that explains the origins of Earth's moon, postulating that an asteroid roughly the size of Mars impacted the Earth during its formation. This impact resulted in rocky surface material being blown outward from the Earth, some of which accreted to form the Moon. This theory explains the similar oxygen isotope ratios between the Earth and the Moon as well as the Moon's lack of an iron core. It also accounts for the angular momentum that was necessary for the Moon to reach its current position.

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Moon			He is particularly known for discovering numerous aspects of the complex and subtle dynamical interactions between planetary objects and gaseous and particle disks, for helping to give birth to the giant impact theory of lunar formation and for discovering the oscillations in Mars' polar axis that drive strong climate variation over time. SwRI's Ward Named Fellow of AAAS by Business Wire			giant buttercup giant cane giant cell giant chinkapin giant chinquapin giant clam giant cockroach giant conch giant coreopsis giant crab giant eland Giant fennel giant fern giant fir giant foxtail giant fulmar giant garlic giant granadilla giant ground sloth giant helleborine Giant heron giant hives giant hogweed giant hornet giant hyssop giant impact theory giant kangaroo Giant kettle giant killer giant kingfisher giant lizard giant moa giant molecular cloud giant northwest shipworm Giant order giant panda giant peacock moth giant perch giant petrel giant pigfish giant planet giant potato creeper giant powder giant puffball giant red paintbrush giant redwood giant reed giant ryegrass giant salamander giant scallop giant schnauzer			Giant gerbil Giant Global Graph giant granadilla giant granadillas giant granadillas giant granite Giant Green Umbrella giant ground sloth giant ground sloth Giant Hairy Nevus Giant Hairy Nevus Giant Hairy Nevus Giant Hatte Einen Superstar Giant Helicoid Peripapillary Choroidopathy giant helleborine giant hemangioma of Kasabach-Merritt Giant heron Giant Hill Giant Hill giant hives Giant Hogweed Giant Hogweed Giant Hogweed Giant Hogweed giant hornet giant hypertrophic gastritis giant hypertrophic gastritis giant hypertrophic gastritis giant hyssop Giant impact hypothesis giant impact theory Giant Imperial Quart Giant in the Playground Giant Inflatable Penguin Giant Interneuron 3 Giant intestinal roundworm Giant intestinal roundworm Giant intestinal roundworm Giant Inverted Boomerang Giant Irish deer Giant Irish deer Giant Java Tree Giant jellyfish giant kangaroo Giant Kelp Giant Kelp Giant Kelp Giant kettle Giant kidney worm Giant kidney worm Giant kidney worm Giant kidney worm giant killer Giant Killer Media Design LLC Giant Killer Robots Giant Killers Organization Giant Kingfisher Giant Lantern Festival Giant Large Scale Integration giant liver fluke giant liver fluke

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