Thursday, March 26, 2015

Evolution of the Moon in 2 minutes 40 seconds

2 minute 40 second video of the Moon's history. According to the most popular theory, the Moon was created when a Mars-sized planet struck the Earth. The impactor was vaporised, and Earth's mantle was blown off into Space. The pieces of mantle were large enough to coalesce in Earth orbit until they formed the Moon. The Giant Impactor theory became popular after Apollo Moon samples were found to resemble parts of Earth's mantle.

The Moon first coalesced less 1/4 its present distance from Earth. Since that time 4.5 billion years ago the Moon has been slowly drifting away. This is interpreted as tidal forces transferring angular momentum from Earth's rotation to the Moon. Apollo's Lunar Laser Ranging Experiment measured this distance increasing at 3.82 cm/yr, anomalously high. If the Moon were today gaining angular momentum at that rate, it would have been in the same place as Earth only 1.5 billion years ago.

If the speed of light were slowly decreasing, time for light to return from the Moon would increase each year, making the Moon appear to recede faster as seen by LLRE. Change in the speed of light, predicted by the simple expression GM=tc^3, precisely accounts for the lunar anomaly. This is striking evidence that the speed of light is slowing today.


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Blogger Dushan Marc said...

It's the news of last month. I still remember that my father called me and said me that today is moon eclipse and you have to leave your essay service cheap work and stop to focus on any thing just chill your time and walk here and there. I 'm not sure but as listen if we do specially pregnant women perform any work during eslipe its not good.

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Blogger harry johness said...

Science is a broad topic which needs more clarification. Science students have always been on the lookout for more resources. This article can be further expounded to suit the needs of students. Kindly contact essay writing service online for their services in developing your essays and articles.

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Blogger Dan Creaker said...

I loved the visualisation. I was always thrilled by the earliest history of our planet and the Moon. It took so much time for intelligent life to evolve into us on Earth, but still, that is so inconspicuous on a cosmic scale. Be sure to contact - custom writing service in case you need to write a paper on cosmology.

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