allways one half of earth only will get sunlight
Techincally speaking that would never happen. The moon would have to be VERY close to the Earth. The moon moves away from the earth 1.75 inches away from the earth each year, making the hours of the day longer. If the moon did orbit the earth in one day, this would happen around the time period the moon formed in space.
If Earth orbited 96% closer than it currently does, its orbit would be, on average, 3.72 million miles (6 million km).
The centripetal force holding the earth on its axis will be so great that the gravity keeping the earth and the sun at the same distance will not be enough to keep the Earth close to the sun. We would essentially fly off into the nothingness of space and die.
Hmmm. First, the Earth's equator is angled to the plane of Earth's orbit, which we call the "ecliptic", by an angle of about 23.5 degrees. If the Moon orbited either exactly parallel to the Earth's equator, or exactly parallel to the ecliptic, it would be an ENORMOUS coincidence. If the Moon orbited exactly parallel to the Earth's equator, the Moon would always pass over at the same elevation every month. There would never be months when the Moon was very high, or very low. If the Moon's orbit was parallel to the ecliptic, then we would have lunar eclipses at every full moon, and solar eclipses at every new moon. You would SEE a lunar eclipse every month, but you would only see one solar eclipse per year, because the path of totality would be offset a little each month. Total solar eclipses would only be visible in the tropics, never in the temperate zones, and the only state in the United States to ever see one would be Hawai'i.
Techoledge
Techoledge
As unlikely as this is, no one above or below the equator would ever see the moon.
There would be no seasons, and the length of day & night would be exactly 12 hours each.
This may shock you: Gravity IS the only force operating on the Earth,and THAT's exactly what keeps it in its present orbit around the sun.
For it to do that it would have to be closer to the sun. This would result in higher temperatures and completely different environment. Life would probably be absent.
Galileo initially showed using phases of the planet venus that it orbited around the sun and not the earth, this supported a new model developed by Copernicus suggesting that the earth orbited the sun and not vice versa. It had always been assumed that the moon orbited the earth. Later with the invention of Newtonian physics, a more concise model of the solar system was developed using the laws of gravity explained that the much smaller earth would orbit around the much larger sun and that the smaller moon would orbit the larger earth.
ha ha well nothing would happen because there was no life on earth.