If you live on the moon, you will have to give up many of the things on Earth that you take for granted. For example, the feeling of being able to firmly step on the ground with your feet, being able to breathe outdoors without a helmet, and the wonderful night sky. Humans have spent thousands of years staring at the moon, watching it rise and set, recording its profit and loss every month, but from the perspective of the moon, what would the Earth look like hanging in the sky? First of all, it depends on where you stand!
The Moon is tidally locked to Earth, meaning that the Moon's orbital period matches its rotation period. It takes about a month for the Moon to orbit the Earth and rotate around the Earth's axis. In practice, this means that the same side of the Moon is always facing our Earth. That's why when you look through a telescope, craters and other features on the lunar surface are always in the same place. The first person to see the far side of the moon directly, the side that always had his back to Earth, was the Apollo 8 astronauts. If you camp on the far end of the moon, you'll never see Earth. If you're up close, you'll always see Earth.
Professor Phil Nicholson, associate director of the Cornell Center for Astrophysics and Planetary Sciences in Ithaca, New York, said: "It seems that the Earth does indeed go through different stages in a month's time, which is the opposite of the moon phases that people see on Earth." Lunar phases occur because half of the Moon is always illuminated by the Sun.
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The month-long profit and loss cycle we see is nothing more than the moon moving around the Earth, from a long lunar day to night. When Earthlings stare at a dark new moon (when the side of the Moon facing the Earth is not illuminated by the Sun), lunar observers see a "complete Earth" with half of the Earth completely illuminated by the Sun.
Over the next two weeks, the moon's inhabitants will see the earth's crescent-shaped contraction until the moon faces the dark side of the earth at night. At that time, the earthlings will be bathed in the light of the full moon. For a person standing on the moon, the reflected light of this full moon (and perhaps some artificial light) may make the new Earth faintly visible. Christine Shupla, education and public engagement manager at NASA's Institute for The Moon and Planet, said: "It's not just going to look dark, you're going to see the potential light on Earth in cities." However, your view of the Earth may not be very clear.
If your moon is experiencing daylight, your observations of the universe may be influenced by helmets or the glowing sunlight on lunar rocks, but because the moon doesn't have an atmosphere, you can still see the stars during the day. To us, the Earth would also look much larger than the Moon (the Earth is about four times the diameter of the Moon). From the perspective of the Moon, the Earth will always appear in a fixed position. While the Earth goes through some stages, it doesn't actually move in the sky, and since the Moon is elliptical, it swings back and forth a bit, but it doesn't rise and fall like the Moon does to Earth.
So, if you're standing in the middle of what we think of as the moon's disk, the Earth will always appear directly above. However, from the moon, you don't always see the same characteristics of Earth. As the planets rotate, you'll notice different features. The Earth rotates faster than the Moon, and over time you see more oceans, sometimes you see more continents. So what kind of eclipses do you see from the moon? If you live on the moon, it will be easier to see the eclipse because the Earth is much larger, and what we call a lunar eclipse (when the moon is in the shadow of the sun) is a solar eclipse from the lunar perspective.