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What else can I help you with?
How many times will a person on the far side of the moon would observe earth's rise?
It's impossible to see Earth rise from the surface of the moon, since the moon is tidally locked in Earth's orbit.
Would the length of the day be shorter if earth were in an orbit closer to sun?
No, the distance of earth from the sun is independent of day length which has to do with the rotational rate of the earth about its axis, except under extreme cases. If the earth where sufficiently close to the sun it would become tidally locked meaning that the same side of the earth would always face the sun. This is the case with mercury which is tidally locked with the sun and the moon which is tidally locked with the earth. The size of the orbit does however determine the length of an earth year. Being the earth's orbit is very nearly circular I will refer to it as a circle for clarity. A smaller circle means a shorter year (ie less time to make a complete trip around the sun often referred to as an orbital period) and a larger circle means a longer year.
Is Earth tidally locked with the Sun?
No, Earth is not tidally locked with the Sun. Tidal locking occurs when one side of a celestial body always faces its parent body, like the Moon does with Earth. Earth rotates on its axis, causing day and night, and does not have a permanent day or night side facing the Sun.
What would happened to the earth if it were tidally locked to an m typed low mass star?
If it were tidally locked, night and day would not exist and the temperature difference between the light side and the dark side would be much more, perhaps enough to boil off the oceans. If it were near a red dwarf, it would depend on the size of the orbit. Since the star would be much smaller than the Sun, the orbit would have to be a lot smaller to allow a similar power density at the Earth's surface. That might mean a much shorter year.
What is the meaning of the term tidal locking as related to astronomy?
Tidal locking refers to when an object in orbit around another object always has the same face pointing towards the planet - the time taken for one rotation of the body would therefore be the same time that it takes to orbit once around the object that it is tidally locked to. This does not occur by chance, the irregular mass distribution of an orbiting body will cause it to become tidally locked over time, but further back in time it may have spun at a different rate. One example of a tidally locked object is our moon. It is tidally locked to the earth, meaning that the same face always faces the earth. It is thought that this may have not always been the case but has happened over time. Other moons in our solar system are also locked to their planets. In some cases, both object may eventually become tidally locked to each other, two objects in orbit about one another may reach a state where they both always have the same face directed at each other.
Why does the same side of the moon always faced earth?
The moon is tidally locked with the earth. The reason is that the moon is slightly heavier on one side than the other. Due to tidal friction, the moon's rotation (with respect to earth) would have gradually slowed over the eons, so that eventually it would lock in resonance with the earth. The moon probably became tidally locked more than a billion years ago, long before any life on earth evolved eyes. Therefore the distant side of the moon remained unknown until we sent orbiters around it to snap photos. I believe the Russians succeeded at this first.
Would there still be tides if the earth stopped?
Presumably the question is about the Earth's rotation stopping. Eventually, the Earth WILL almost stop rotating on its axis and will become "tidally locked" with the Moon. Then the Earth Moon system will rotate with each facing the other, in "synchronous rotation". At that time and ignoring other things that might happen first, The Earth would no longer have tides. If you want to be really "picky" the Earth would still be rotating very slowly, in that scenario. If the Earth's rotation could stop completely, there would be some (very slow) tides. Also, there would still be a very small effect caused by the Sun.
Does the sun and moon rise and set becaus of the earth is spinning?
Yes... sort of. The reason for the qualification there is that it's a little more complicated than that, and it partially depends on what you mean by "not spinning". If the Earth were tidally locked with the Sun, the Sun would not appear to rise or set; it would remain in pretty much the same place in the sky. However, in that case the Earth would still be "spinning" ... it's just that its periods of rotation and revolution would be the same. If the Earth were not spinning at all, the STARS would not appear to rise and set, but the Sun would rise and set once (each) per year. The Moon is a separate issue. The fact that the Moon revolves around the Earth means that it will rise and set regardless of whether the Earth spins or not unless the Earth were tidally locked with the Moon. Again, in that case the Earth would be spinning, but each "day" would be about a month long, and the Sun would rise and set 12 or 13 times (each) per year.
If you were standing on Pluto how often would you see the satellite Charon rise above the horizon each day?
On Pluto, one day is about 6.4 Earth days long, so Charon would rise above the horizon twice a day. This is because Pluto and Charon are tidally locked, meaning they always show the same face to each other as they orbit, so Charon rises and sets every 3.2 Earth days from Pluto's perspective.
What if the sun was replaced by a red dwarf?
We would all be dead. There is a good chance that we would be tidally locked. Also most red dwarfs emit their light as infrared, not visible and are very variable in their output.
If the moon rotated on its axis just as quickly as earth Would we still always see the same side of the moon from earth?
If the Moon rotated on its axis as quickly as Earth, we would not always see the same side of the Moon from Earth. Currently, the Moon is tidally locked, meaning it takes the same amount of time to rotate on its axis as it does to orbit Earth, resulting in one side always facing us. If it rotated faster, different parts of the Moon would be visible from Earth over time.
How would the moon appear from earth if the moon did not rotate?
If the moon did not rotate, it would not be tidally locked with Earth, meaning we would see its entire surface over time as it orbited our planet. This would allow us to view the far side of the moon, which is currently hidden from us. However, the moon's phases and appearance would remain the same, as they are determined by its position relative to the Earth and the Sun. The overall experience of observing the moon would be vastly different, offering a continuously changing view of its features.
