To understand the answer to this question, you have to understand how Earth is situated in space. Earth's axis is tilted, but it always points the same direction. That direction happens to be straight at a bright star named Polaris, which is commonly called the North Star. Earth revolves once a day, and where it is in that revolution when the sun sets changes throughout the year. That is why the constellations you see at night change.
If you lived at the North Pole, the North Star would be directly overhead, and the constellations would wheel around you like the horses in a giant carousel would if you stood in the middle. You would only see half of the constellations, but the same ones would be in the sky all the time; none of them would ever set. However, for some parts of the year the sun never sets either! And that's no good for seeing constellations.
If you lived on the equator, it would be completely different. The giant carousel would be on its side. The North Star would sit right on the northern horizon. Each constellation would spend half of its time in the sky. Each one would come up in the east and set in the west 12 hours later. However, each day, the sun would blot out half of them, and the ones it blotted out would change throughout the year. Once again, you couldn't see any of them all the time.
Most people live in between those two extremes. Halfway between the equator and the North Pole, half of the sky acts like it does from the equator, and half of it looks like it does from the pole. The giant carousel is tilted halfway up, and the North Star is halfway up the sky. The stars opposite the pole rise and set each day, but the stars near the pole (and the North Star) go in circles. If one goes in a small enough circle, it will be up all night long, every night. (We would call that star "circumpolar".) If the circle gets too big, the star will be cut off by the horizon some of the time..
2007-03-21 23:54:12
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answer #1
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answered by Anonymous
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Orion constellation located on the celestial equator and Big dipper which is a part of Ursa Major constellation viewed from the middle latitude of Northern hemisphere
2007-03-22 15:40:53
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answer #2
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answered by nithi 2
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depend on the geographical location of the country u live in.
In india u can see the orion and the big dipper thro out the year.
2007-03-22 08:36:58
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answer #3
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answered by dudeofanythingrad 1
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There are two constellationthat we seeall year are
1)Ursa major & minor.
2)Orion
2007-03-22 10:37:44
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answer #4
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answered by Aashish 1
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The big dipper and the little dipper.
2007-03-22 08:06:40
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answer #5
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answered by nightbutterfly69 6
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ursa major and ursa minor
2007-03-23 10:38:09
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answer #6
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answered by Anonymous
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