Darkside of the moon
This hemisphere was hidden from human view until the Soviet automatic probe Luna 3 photographed it for the first time on October 7, 1959. Since the Moon takes the same time to go around itself as it does around the Earth, it always has the same face visible from the Earth. This is because the Earth, by an effect called gravitational gradient, has completely slowed down the Moon. Most of the regular satellites present this phenomenon with respect to their planets.
In the programs for the establishment of a stable lunar base, it has been planned to use the occulted hemisphere for the installation of observation instruments for the study of the firmament, since that is more protected from the influence of the Earth than the visible hemisphere.
On December 7, 2018, China launched the Chang’e 4 probe to explore the hidden side of the Moon for the first time in history. This probe succeeded in landing on the moon on January 3, 2019 and is intended, among other things, to study low radio frequencies, tomato cultivation on other planets and mineral resources. The probe was launched on January 3, 2019.
Dark side of the moon pink floyd
There are several myths about the dark side of the moon. Pink Floyd, with its album Dark side of the moon, reinforced one of them: the idea that this side is always dark. From the way we see it from Earth, it is easy to believe that the Moon is white and round like a lamppost, like a cheese, like a ball, like anything else it has ever been compared to. Nothing of the sort.
First of all, all sides of the Moon are illuminated by the Sun, for equal periods of time. This is called the lunar day. Like the Earth, the Moon also rotates on its own axis. However, from here, we always see the same part. So it is logical to think that the other side is eternally dark.
The moon rotates
The visible side of the Moon is the hemisphere of the Moon that is permanently oriented toward the Earth, the opposite hemisphere being the hidden side of the Moon. The reason why only this side of the Moon is visible from Earth is because the Moon rotates around its axis of rotation at the same rate at which it orbits the Earth, known as synchronous rotation or tidal coupling.
The Moon is directly illuminated by the Sun and due to the zisical variation of viewing conditions from the Earth what is known as lunar phases occur. The unilluminated parts of the Moon can sometimes be faintly illuminated due to the Earth’s brightness, which is nothing more than sunlight reflecting off the Earth’s surface and being projected onto the Moon. Because the Moon’s orbit is somewhat elliptical and tilted with respect to its equatorial plane, librations allow up to 59% of the Moon’s surface to be seen from Earth (although from any point on Earth at any time only half of the satellite can be observed).
Movement of the moon
The Chinese probe’s radar showed a layer of homogeneous material at 12 meters depth with sporadic rocks; then, from 12 to 24 meters, a layer of mostly evenly distributed rocks ranging from 0.2 to 1 meter in diameter; and later a layer of rocks mixed with finer material.
«This work shows that extensive use of LPR (radar that the Chinese worked with on the lunar surface) could greatly improve our understanding of the history of lunar impacts and volcanism, and could shed new light on our understanding of the geological evolution of the Moon’s far side,» he explained.