Planet earth spins clockwise, just like the sun rises every day in the east, the stars do too as a result of that.
If you are located anywhere on earth that's more than 23.5 degrees from the equator, then the sun can never appear at your zenith. If you're anywhere within 23.5 degrees of the equator, then the sun will appear at your zenith, or very close to it, twice each year.
If you want to get technically precise, then for a single observer who stays putin the same place, it would be a very rare occurrence. But you can be sure thatthe moon is precisely at the zenith for a point somewhereon the equator every13.7 days.
The Prime Meridian touches both the north and south poles, but if you reallywant to be correct about it, it doesn't 'pass through' either of them.The poles are the ends of the Prime Meridian. So when it reaches each pole,it stops there, and doesn't 'pass through'.
Each of those lines crosses parts of Africa. I am surprised.
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That depends on your latitude. Also, it does NOT depend on the season. If a star passes near the zenith in Summer, it will also pass near the Zenith in Winter, although it may not be visible in one season or the other (when it passes near the Zenith during the daytime).
If you are located anywhere on earth that's more than 23.5 degrees from the equator, then the sun can never appear at your zenith. If you're anywhere within 23.5 degrees of the equator, then the sun will appear at your zenith, or very close to it, twice each year.
A person would have to visit the equator for the celestial equator to pass through your zenith or one would have to be at the south pole for the south celestial pole to be at your zenith. You would not see this, but you could note it.
They look like before they pass through each other.
That isn't possible. If you are at one of the tropics (23.5 degrees north or south of the equator), then the Sun will pass the zenith at noon, during a solstice. But in both cases (north versus south), that would happen at the SUMMER solstice.
If you want to get technically precise, then for a single observer who stays putin the same place, it would be a very rare occurrence. But you can be sure thatthe moon is precisely at the zenith for a point somewhereon the equator every13.7 days.
no
These all pass within 5 degrees of the zenith: Hamal (Alpha Arieties), Aldebaran (Alpha Tauri), Algieba (Gamma Leonis), Arcturus (Alpha Bootis), There are other fainter ones as well
Stars 'twinkle', planets do not. This is due to the proximity of planets, the light from which does not pass through so much dust and vary accordingly.
A polaroid allows light to pass through it in only one plane. If both polaroids are aligned, they will allow light to pass through the same plane. Otherwise, each will allow light to pass through a different plane and the overall effect of the two polaroids is that it will not allow light to pass through them.
you have to pass each level with a amount of two or more stars.
It has 8. Each passes through the centre. Four pass through vertices, four pass through the mid-points of opposite sides