how does this informatiohn provide a deffernt perspective than the man went to the far side of the moon
Answers
Answer:
The moon shows us its smiling "Man in the Moon" face every month, illuminated by the sun to varying degrees over the course of its orbit around us. However, thanks to its orbital dynamics, we only ever get to see that one hemisphere from Earth. The other hemisphere — the "far side" — is constantly concealed from us.
Well, that's not strictly true. Libration, which is the gentle "wobbling" of the moon in the sky caused by changes in its position in its elliptical (i.e. non-circular) orbit around Earth, mean we can catch glimpses of small slivers of the far side — we can actually see 59 percent of the moon's surface from Earth at different times of the year. But until the first space missions to the moon flew around our natural satellite, what lay beyond on the far side was a mystery.
It's often mistakenly thought that the far side of the moon is in darkness. Rather, it experiences day/night cycles just like the near side. When we see half of the moon being illuminated by the sun, giving it a half or crescent shape in the sky, half of the moon on the far side is being illuminated at the same time. When the moon is new, the far side is in full daylight instead. When the moon is full, it's night-time on the far side. [China's Chang'e 4 Moon Far Side Mission in Pictures]
The reason we only see the one face is because of a phenomenon known as "tidal locking." The moon rotates on its axis roughly once every 27 days, which is the same amount of time it takes to orbit the Earth. This means it is rotating at a rate that means we always see the same face, more or less, as it moves around Earth.
"There are two weeks of daylight and two weeks of night on every spot on the lunar surface," Charlie Duke, who was the Lunar Module pilot on the Apollo 16 mission, told All About Space. "It was early morning during the moon day at the Apollo 16 landing site, which was called Descartes. We were the fifth mission to land on the moon, and I can say that it really is a dramatic place."
Our first glimpse of the mysterious far side came early in the space race, courtesy of the Soviet Union's Luna 3 spacecraft almost 60 years ago. In 1959, barely two years after placing Sputnik 1 in orbit, Russian engineers managed to send the spacecraft, which was crude by today's standards, into orbit around the moon and, for the first time, we got a good look at the mysterious far side.
Luna 3 took 29 film images of the far side in total, which were photographically developed, fixed and dried on board — remember, this was long before multi mega-pixel cameras. Ironically, the film used had been stolen from American spy balloons, as it had to be sturdy and radiation-hardened.
The spacecraft, using a combination of two camera systems, one wide-field and one narrow-field but higher resolution, and a crude onboard scanner, could then transmit the processed images, which were spot-scanned from the photographs, back to the receiving station in the former Soviet Union. Although only 17 of the 29 taken were transmitted successfully back to Earth, of which six were considered good enough for publication, they proved to be a revelation.
.
