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Earth formed in this manner about 4.54 billion years ago (with an uncertainty of 1%) [25] [26] [4] and was largely completed within 10–20 million years. [27] In June 2023, scientists reported evidence that the planet Earth may have formed in just three million years, much faster than the 10−100 million years thought earlier.
How the Earth Was Made is a documentary television series produced by Pioneer Productions for the History Channel.It began as a two-hour special exploring the geological history of Earth, airing on December 16, 2007.
The Moon formed soon afterwards, possibly as a result of the impact of a large planetoid with the Earth. [ 12 ] [ 13 ] More recent potassium isotopic studies suggest that the Moon was formed by a smaller, high-energy, high-angular-momentum giant impact cleaving off a significant portion of the Earth. [ 14 ]
Watch a video created with the simulation: ... NASA just released a time-lapse from space showing a year on Earth. ... 2024's final full moon. Sports. Sports.
Earth's atmosphere and oceans were formed by volcanic activity and outgassing. [43] Water vapor from these sources condensed into the oceans, augmented by water and ice from asteroids, protoplanets, and comets. [44] Sufficient water to fill the oceans may have been on Earth since it formed. [45]
c. 4,450 Ma – 100 million years after the Moon formed, the first lunar crust, formed of lunar anorthosite, differentiates from lower magmas. The earliest Earth crust probably forms similarly out of similar material. On Earth the pluvial period starts, in which the Earth's crust cools enough to let oceans form.
In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. [19] [20] He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value.
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