111
edits
Changes
Jump to navigation
Jump to search
Line 145:
Line 145: − + − − All of these scenarios had serious defects as theories, and all were made before the Apollo Moon Program of the late 1960s and early 1970s brought back tons of Moon rock to provide scientists with unprecedented data about the Moon’s composition and history. That data, and the more sophisticated measurements of the Moon’s mass and orbit available to recent researchers, led to the earlier theories losing favor and the promotion of a new one: “The Big Impact Hypothesis”. This theory envisages a massive collision between an ancient Earth and a large asteroid, one in which the early Earth melted and the asteroid disintegrated, only to re-coalesce as the Moon over a period of time. + +
→swap article and discussion pages for superior treatment, more fun
-------------------------------------------
-------------------------------------------
There is not a complete consensus amongst contemporary scientists as to how the Moon came into existence. Historically , three hypotheses were widely seen as plausible contenders for such an explanation: they were the “Fission Hypothesis”, which held that the Moon was ejected by the ancient, swiftly-spinning Earth; the “Capture Hypothesis”, in which the Earth’s gravity captured another planet; and the “Co-accretion Hypothesis” in which both the Earth and the Moon came into being side by side formed together from the same primordial loose aggregation of space dust.
There is not (blah blah)coalesce as the Moon over a period of time.
-----------------------------------------
-----------------------------------------
[[user:mylesP|MylesP]]
[[user:mylesP|MylesP]]
:I didn't do a deep-down analysis of your changes so far, but they look nice! From what I see, you add a more professional tone to it. I'm not quite sure what you want to do with the above paragraphs. Do you want to insert them into the intro (above the ToC)? If so, I'm all for it - they're a nice summary of the article that comes after it. --[[User:Sid 3050|Sid 3050]] 13:24, 7 April 2007 (EDT)
:I didn't do a deep-down analysis of your changes so far, but they look nice! From what I see, you add a more professional tone to it. I'm not quite sure what you want to do with the above paragraphs. Do you want to insert them into the intro (above the ToC)? If so, I'm all for it - they're a nice summary of the article that comes after it. --[[User:Sid 3050|Sid 3050]] 13:24, 7 April 2007 (EDT)
:Thanks Sid, I have rewritten intro, and first 2 pars are changed to incorporate initial ref to new theory "Big Whack" at very start. Normal stylistic changes made to body of article. No change in content. Would suggest writers use brackets sparingly - they are not commas. Also, frowned on appearance of terms FeO and “siderophilic” without definition. Turns out former is Ferrous Oxide, and latter means “iron loving”. Have incorporated that as well. All this could be made a little clearer. From what I rem from my own casual reading, reason Moon is poor in iron is because in collision and subsequent heat, most of the heavy stuff sank to Earth’s core. Moon ended up with very little. Basically, Moon is a lot of sterilised accreted dust, fairly boring, and that’s why we stopped going there after we found out what it was made of. Question of angular momentum is dealt with in VERY shallow way. Once again, I’m no expert, but I think there are some big misconceptions here. Will leave note in another section here. [[user:mylesP|MylesP]]
== Young Earth Creation Hypothesis ==
== Young Earth Creation Hypothesis ==