Tiger Forest Planet Earth we can make a difference for our planet after all 10 Earth Tiger Forest Planet

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Earth's Moon Reveals An Ancient Secret. Many astronomers think that during an ancient era, termed the Late Heavy Bombardment, our young Moon was violently battered by a marauding multitude of invading asteroids that crashed onto its newly formed surface. This attack of pelting objects from space occurred about 4 billion years ago, and the shower of crashing asteroids excavated impact craters, and also slashed open deep fissures, in the lunar crust. This sustained shower of merciless impacts increased lunar porosity, and opened up an intertwining network of large seams under the Moon's surface.



So here you have two definitions of a blue moon but the one for a calendar blue moon does not describe the true meaning of a blue moon. Here's why:



Most of the Big Whack theory was suggested in 1975 by Dr. William K. Hartmann and Dr. Donald R. Davis of the Planetary Science Institute in Tucson, Arizona. Their theory was derived from geological evidence that had been collected by the Apollo astronauts when they made their historic trip to the Moon in 1969. Oxygen isotopes within the lunar rocks were found to be almost identical to those on Earth. Furthermore, other pieces of evidence revealed that the Moon is partly composed of the same material as Earth's mantle.