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Why Are The Two Sides of The Moon So Different?
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Will you accept a suggestion for your leisure time?
Sit by the sea or look out from the balcony of a great mountain range, take five minutes to look at the moon, and let your mind go back to the unconscious times when the spots on the moon represented a world of ever-changing figures.
Try to discover new ones. Then come back to yourself and, rationalizing your knowledge, ask yourself a question you may never have really thought about: why are the lunar seas all concentrated in the hemisphere facing Earth?
The problem, as you will see, is far from trivial, and the solution is far less intuitive than you might think.
Puzzlement
The most surprised by this revelation were indeed the experts in the field, who, although still in the controversy about the volcanic or impact genesis of the craters, had managed in previous years to form a rather reasonable picture of the turbulent history of the lunar landscape.
What popular culture defined as "spots on the Moon" were for official science nothing more than large basins filled with impressive lava flows of darker material, surrounded by the higher regions, the so-called highlands, whose tortuous terrain clearly told of a past marked by the destructive action of cosmic projectiles of every dimension.
The reaction
The first explanations invoked a marked asymmetry in the flow of cosmic projectiles hitting the Moon. The idea was that the presence of oceans on the side facing the Earth could be attributed to a greater number of high-energy impacts than those that affected the hidden side.
A new surprise
But it was not only the impact mechanism that was questioned.
The famous American astronomer Gerard Kuiper also invoked an asymmetric distribution of intense volcanic activity, but this idea did not gain much traction, in part because it could not explain how such a marked difference in geological activity could exist between the two hemispheres.
It gets more complicated
Apart from the fact that it remains to be explained why the crust is thinner exactly in the hemisphere facing the Earth, someone has immediately objected that there are also regions on the hidden side characterized by a very thin crust, but nevertheless,
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Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/ESA/ESO/ Flickr
Video Chapters:
00:00 Intro
00:51 Overview
02:40 An epochal turning point
03:40 Puzzlement!
05:20 The reaction!
08:07 A new surprise
10:04 Towards a common solution?
10:43 It gets more complicated
11:50 A preliminary conclusion
#insanecuriosity #moonside #themoon
Sit by the sea or look out from the balcony of a great mountain range, take five minutes to look at the moon, and let your mind go back to the unconscious times when the spots on the moon represented a world of ever-changing figures.
Try to discover new ones. Then come back to yourself and, rationalizing your knowledge, ask yourself a question you may never have really thought about: why are the lunar seas all concentrated in the hemisphere facing Earth?
The problem, as you will see, is far from trivial, and the solution is far less intuitive than you might think.
Puzzlement
The most surprised by this revelation were indeed the experts in the field, who, although still in the controversy about the volcanic or impact genesis of the craters, had managed in previous years to form a rather reasonable picture of the turbulent history of the lunar landscape.
What popular culture defined as "spots on the Moon" were for official science nothing more than large basins filled with impressive lava flows of darker material, surrounded by the higher regions, the so-called highlands, whose tortuous terrain clearly told of a past marked by the destructive action of cosmic projectiles of every dimension.
The reaction
The first explanations invoked a marked asymmetry in the flow of cosmic projectiles hitting the Moon. The idea was that the presence of oceans on the side facing the Earth could be attributed to a greater number of high-energy impacts than those that affected the hidden side.
A new surprise
But it was not only the impact mechanism that was questioned.
The famous American astronomer Gerard Kuiper also invoked an asymmetric distribution of intense volcanic activity, but this idea did not gain much traction, in part because it could not explain how such a marked difference in geological activity could exist between the two hemispheres.
It gets more complicated
Apart from the fact that it remains to be explained why the crust is thinner exactly in the hemisphere facing the Earth, someone has immediately objected that there are also regions on the hidden side characterized by a very thin crust, but nevertheless,
-
Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/ESA/ESO/ Flickr
Video Chapters:
00:00 Intro
00:51 Overview
02:40 An epochal turning point
03:40 Puzzlement!
05:20 The reaction!
08:07 A new surprise
10:04 Towards a common solution?
10:43 It gets more complicated
11:50 A preliminary conclusion
#insanecuriosity #moonside #themoon
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