Since the beginning of time, mankind has been fascinated by the Sun during the day and the Moon at night.
A couple of years ago, When I was in Chicago, and visited Adler Planetarium.
It was an amazing hour in my life when I was there.
I saw real spacecraft and VR demos about Moon and real-time Astronaut VR in capsules.
The dark face of the moon is unknown to each of us until Chinese Chang.
The 4 modules of Chang’ı-5 were launched from the center in Vinchang on November 24 with the Long March 5-Y rocket.
In 2019, China landed the Chang’i-4 robotic vehicle on the dark side of the Moon, becoming the first country to do so.
The fact that the Sun is not very suitable for observation and the Moon attracts much more attention at night with the stars has brought along many unknowns.
It was realized at a time when it was still thought that the Sun revolved around the Earth just like the Moon, and this question stuck in my mind;
Why does the Moon always show us the same face?
and
Why does the Moon always show us the same face?
These questions, like many other astronomical questions, were solved by the versatile scientists of the time, when the conditions for observation were still very poor, perhaps only the naked eye.
In fact, the answer lies in the fact that the rotation times of the Moon around the Earth and around its own axis are close enough to be called the same.
In other words, as the Moon moves around the Earth, the points that should be out of the Earth’s field of view remain within the Earth’s field of view as the Moon moves around the Earth in the same direction.
The ellipse of the Moon’s orbit around the Earth causes the Moon’s speed around the Earth to decrease as it moves away from the Earth, making the portion of the Moon visible from our Earth 60% instead of 50%.
This is why we are sometimes facing at a very acute angle toward the south pole and sometimes toward the north pole.
“The Moon’s Surface Never Visible from Earth”
What about the other 40%?
This part has never faced the Earth and will never do so unless there is a catastrophe by solar system standards.
This part of the moon, which can be as bright as the other parts of the moon depending on its location, has been nicknamed darkness because it is not visible from Earth and is sometimes referred to as the “other side of the moon”, which is more accurate.
Of course, humanity has never been satisfied with what its eyes could see and has brought what it wanted to see to the forefront of its eyes.
Beginning in the 1950s, we managed to photograph what we could not see in space studies, and we encountered a geographically and visually quite different Ayl from what we had seen.
The first people who were able to see this landscape, which has inspired many artistic works, including Pink Floyd’s legendary album “dark side of the moon”, with the naked eye, not through photography, but during the research missions around the Moon in line with the Apollo project, are as follows;
Apollo 8: Frank Borman, James Lovell, William Anders
Apollo 10: Thomas Stafford, Eugene Cernan, John Young
Apollo 11: Neil Armstrong, Edwin Aldrin, Michael Collins
Apollo 12: Charles Conrad, Alan Bean, Richard Gordon
Apollo 13: James Lovell, Fred Haise, John Swigert
Apollo 14: Alan Shepard, Edgar Mitchell, Stuart Roosa
Apollo 15: David Scott, James Irwin, Alfred Worden
Apollo 16: John Young, Charles Duke, Thomas Mattingly
Apollo 17: Eugene Cernan, Harrison Schmitt, Ronald Evans
Finally, NASA’s twin spacecraft, the Grails, has sent back new photos of the dark side.
With the cameras on the spacecraft, very efficient observations were made of the 900-kilometer-diameter “Mare Orientale” crater and the 149-kilometer-diameter “Drygalski” crater.
“Spacecraft the size of a washing machine”
Two identical vehicles, each the size of a washing machine, sent into space to study the Moon’s gravity in collaboration with MIT and NASA, have already demonstrated their function at the beginning of the mission.
Considering that the Grail twins will come within 55 kilometers of the Moon, our lunar maps will be much more detailed in the future.
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