Changes

The hypothesis is far from complete, though. Despite addressing the issues raised in the light of the first lunar landings, the Giant Impact Hypothesis leaves quite a few issues currently not fully addressed:

The hypothesis is far from complete, though. Despite addressing the issues raised in the light of the first lunar landings, the Giant Impact Hypothesis leaves quite a few issues currently not fully addressed:

*One study suggested three tests of the hypothesis, based on things that should have occurred after such an impact. The result of these tests did not prove the Giant Impact Hypothesis, but it also did not disprove it. Still, the paper raised a few points that have to be factored into the model.<ref>J. H. Jones: [http://www.lpi.usra.edu/meetings/origin98/pdf/4045.pdf "Tests of the Giant Impact Hypothesis"]</ref>

*One study suggested three tests of the hypothesis, based on things that should have occurred after such an impact. The result of these tests did not prove the Giant Impact Hypothesis, but it also did not disprove it. Still, the paper raised a few points that have to be factored into the model.<ref>J. H. Jones: [http://www.lpi.usra.edu/meetings/origin98/pdf/4045.pdf "Tests of the Giant Impact Hypothesis"]</ref>

*A study analysing the bulk composition has come to the conclusion that "the high bulk FeO content of the Moon rules out the derivation of the proto-lunar material from any but a small fraction of the terrestrial mantle".<ref>S. R. Taylor: [http://www.lpi.usra.edu/meetings/lpsc97/pdf/1070.PDF "The Bulk Composition of the Moon"]</ref>

*A study analysing the bulk composition has come to the conclusion that "the high bulk FeO (Ferrous Oxide)content of the Moon rules out the derivation of the proto-lunar material from any but a small fraction of the terrestrial mantle".<ref>S. R. Taylor: [http://www.lpi.usra.edu/meetings/lpsc97/pdf/1070.PDF "The Bulk Composition of the Moon"]</ref>

*Addressing the above concern, the Giant Impact Hypothesis raised the point that the impactor also contributed a large share of the base material that formed the Moon. But as another paper pointed out, the Moon is lacking siderophilic elements that should be present in such a case.<ref>Galimov and Krivtsov: [http://www.ias.ac.in/jessci/dec2005/ilc-3.pdf "Origin of the Earth–Moon system"]</ref>

*Addressing the above concern, the Giant Impact Hypothesis raised the point that the impactor also contributed a large share of the base material that formed the Moon. But as another paper pointed out, the Moon is lacking siderophilic (iron-loving)elements that should be present in such a case.<ref>Galimov and Krivtsov: [http://www.ias.ac.in/jessci/dec2005/ilc-3.pdf "Origin of the Earth–Moon system"]</ref>

==Current Status==

==Current Status==