about how long does it take earth to rotate
If the earth completes one rotation in 24 hours, then to turn 45 degrees would take one eighth of 24 hours, or 3 hours. The 'dark' side of the moon. The moon orbits the Earth once every 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis. As a result, the moon does not seem to be spinning but appears to observers from Earth to be keeping almost perfectly still. Scientists call this sychronous rotation. The side of the moon that perpetually faces Earth is known as the near side. The opposite or back side is the far side. It actually takes the Earth 23 hours, 56 minutes, and 4.09 seconds to turn once on its axis compared to the background stars. The night sky, showing 6 hours of rotation captured by long-exposure. Earth (and other planets) do not escape completely unscathed. Just as the Earth exerts friction on the spin of the moon, the moon also exerts friction on the rotation of the Earth. As such, the length of day increases a few milliseconds every century. If you divide 24 hours by 365 days, you’ll see that you’re left with about 4 minutes per day. In other words, the Earth rotates on its axis, but it’s also orbiting around the Sun, so the Sun’s position in the sky catches up by 4 minutes each day. The amount of time it takes for the Earth to turn once on its axis is known as a sidereal day – which is 23.9344696 hours. In fact the Earth rotates once in about 23 hours and 56 minutes. That's called a sidereal day. The day that's exactly 24 hours is called a solar  … day. A solar day is the amount of time required for the Sun to return to its starting position in the sky. The Moon's Orbit and Rotation. It takes the Moon 27.322 days to go around the Earth once. Because of this motion, the Moon appears to move about 13 against the stars each day, or about one-half degree per hour. RSS Feeds. The Earth's Moon is the fifth largest in the whole solar system, and is bigger than the planet Pluto. The Moon has a nearly circular orbit (e=0.05) which is tilted about 5 to the plane of the Earth's orbit. Its average distance from the Earth is 384,400 km. At any given moment, we are all moving at a speed of up to 1,674 kilometers an hour, thanks to the Earth’s rotation, By definition, the Earth’s rotation is the amount of time that it takes to turn around once on its axis. This is, apparently, accomplished once a day – i.e. every 24 hours.. However, there are actually two different kinds of rotation that need to be considered here. For one, there’s the amount of time it take for the Earth to turn once on its axis so that it returns to the same orientation compared to the Universe. In Planetary Science. The time it takes the Earth to rotate once is called a day (24 hours). The actual rotation time is a little less, about 23 hours and 56 minutes. But the solar day is longe … r, almost exactly 24 hours, because of the distance the Earth moves in its orbit around the Sun. The Earth has to turn that extra 4 minutes to again directly face the Sun.
23 hours, 56 minutes, and 4.09 seconds.