The sun or moon shining in the night sky has always fascinated mankind. about 400,000 kilometers away The Moon is the nearest astronomical object to the Earth and the only satellite of the Earth. In ancient Hindu epics, 'Som' or 'Chandra' is described as an astrology of the nine planets (Sun, Moon, Mercury, Venus, Mandala, Jupiter, Saturn, Rahu and Ketu). Among the countless constellations in the sky, the Moon is the only one physically visited by mankind.
What does the Earth look like from the Moon?
More than fifty years ago, on July 20, 1969, two American astronauts, Neil Armstrong and Edwin Aldrin, landed on the moon for the first time. Since then, a total of five successful missions have landed on the moon, including five successful missions by NASA. NASA conducted the last manned mission to the moon in December No female astronaut has ever been a part of a lunar mission. NASA is preparing to send a man to the moon again in Named the Artemis mission , the mission will include at least one female astronaut .
The Moon is the second brightest star in space after the Sun. From Earth, the Sun and Moon can be seen as constellations of about the same size. In reality, however, the Sun is so much larger in volume than the Moon that about 6.4 million moons would easily fit inside the Sun. How is that possible? Both the Moon and the Sun are like a sphere in size. The radius of the Sun is about four hundred times greater than that of the Moon. The distance from the Earth to the Sun is almost twice that of the Moon. Therefore, the two constellations appear to be almost equal in size in the Earth's sky. Coincidental conjunctions are observed in the case of any other planet and satellite in the Solar System. It is noteworthy that the rare cosmic event of a total solar eclipse is possible only because of that coincidental conjunction
Like other thousand-science astronomers visible from Earth, we see the Moon moving from east to west every day. The moon has no light of its own. The Moon shines brightly in the night sky because it reflects some of the light it receives from the Sun. Since the Moon is spherical in shape, half of the Moon receives sunlight at any given time. However, not all parts of the Moon illuminated by sunlight are always visible from Earth. The Moon sometimes disappears from our view throughout the night because of the changing relative geometric positions of the Sun, Earth, and Moon. The next night, the Moon will be seen as a scissors moon in the sky for a short time. Then, for about two weeks, the moon, visible from Earth, will gradually increase in size until the full moon, glistening from the sunlight, will be visible on a full moon night. The Moon will gradually shrink in size from the day after the full moon until the night of the next new moon. As you can easily guess, this cycle, termed the lunar phase, repeats itself over and over again.
What does one see when he looks at the earth? Does the Earth rise every day in the eastern sky of the Moon? Or will the Earth rise in the lunar sky sometimes as a full Earth, sometimes as a half Earth, and sometimes as a scissors Earth and move from east to west? Surprisingly, no such phenomenon will be observed in the lunar sky. From somewhere on the lunar surface, the Earth may always be seen in the middle of the sky or near the equator or in some other part of the sky. While The Earth will never be visible from some parts of the lunar surface. This is due to the synchronous motion of the Moon around the Earth. The Earth revolves around the Sun at about 365 days.They go around once a day. This means that the Earth's orbital period is 365 days. Or a year. The time it takes for the Earth to revolve around its axis is about 24 hours. Amazingly, the Moon orbits relative to the Earth. The period and the cycle period are equal to about one month. The Moon revolves around the Earth only once in about a month.
We are all familiar with the above phenomenon. Now let me discuss an interesting thing. If we stand on the Moon's surface and are visible from the Earth, like thousands of other astronomers, we see the Moon in the east every day, so we always see only one side of the Moon from the Earth. It will be in the direction around the moon. Even on the day of the new moon orbiting the Earth, except for the astronauts, the Sun, the Earth and the Moon have never seen the three constellations with their own eyes. The Earth, opposite to the astronaut's view, is located in a straight line in the same place in the sky. Now, of the visible part of the Moon's surface, however, only the Moon is located between the Earth and the Sun. Because the Moon is visible from the Earth on that day, the astronaut who observes the Earth from a particular position in the sky on the Moon's surface will see a different full Earth depending on the position in the sky. It will be. As mentioned earlier, from somewhere on the Earth where there is a full moon, the Earth may be seen from the Moon around the day in the middle of the sky, the other Earth as a scissors-Earth from somewhere at 45 degrees.
.webp "What does the Earth look like from the Moon?")
Now consider a place on the visible part of the lunar surface. Due to the synchronous motion of the Moon, the Earth will be seen hanging from that place at a particular position in the sky. That location will vary from place to place. As mentioned earlier, from one place the Earth may be seen exactly in the middle of the sky, from another place at an altitude of 45 degrees, and from another place it may be seen exactly at the horizon. Even if you stay in that particular place and observe for hours, you will not see the Earth changing its position in the sky. Instead, the earth will remain stationary. On the day of the full moon on Earth, the three constellations of the Sun, Earth and Moon are almost in a straight line with the Earth in the middle. Instead of seeing the full moon from the Earth that night, an astronaut observing the Earth from the moon's surface would not see the Earth at all in the sky. This is because the part of the Earth that receives sunlight will be in the opposite direction of the astronaut's view. Even on the day of the new moon on Earth, the three constellations of the Sun, Earth and Moon are almost in a straight line. However, the Moon is between the Earth and the Sun The moon will not be visible from the Earth that day, but the astronaut who observes the Earth from the lunar surface will see a full Earth in the sky On the other hand, around the day of the full moon, the Earth will be seen from the Moon as a scissors-earth.
You will see the earth hanging in the same place in the sky. One day he may never see the world at all. Then, for the next two weeks, you will notice the size of the Earth gradually increasing in the same place in the sky. One day he will see a perfect world. From the day after he saw the full Earth, the Earth would gradually shrink in size and disappear from his sight about two weeks later. Then this cycle will be repeated. Instead of the earth not changing its position in the sky in a month he the sun Work rising and setting once. So if an astronaut sees the Earth in one of the visible parts of the lunar surface. He always waits a month to observe the world.
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