North star? - north star leasing
I do not think I need to really know where, as in the north, because there are many ways to know where `s seen in the north, but where is the North Star? How do I find? and it is really point north? how it is possible that if the earth rotates on its axis?
Sunday, January 17, 2010
North Star Leasing North Star?
6 comments:
The earth's axis now points in less than one degree of the Polar Star, the brightest star in the constellation Ursa Minor. Precession changes the direction of the axis points of a cycle that has completed more than 23,000 years ago, there are about 5,000 years ago, said the axis of the star Thuban in Draco and 13,000 years the point will be Vega.
When Polaris is) end faces north (up, with the exception of the North Pole - then you should.
Best way is to find Polaris, hands, use two stars (Merak and Dubhe name) at the end of the bowl of the Big Dipper up and down more or less on Polaris Regulus in Leo.
Let me tell you this .....
The Northern Star is an appropriate title for the sail north star (not true) north. The candidate must be visible from Earth and circumpolar north celestial pole. The latest is the North Star. It is near the north celestial pole, but two thirds of 1 °.
Now there is a difference between magnetic North and True North north.True navigation is a term that refers to the North Pole on the position of the browser. The direction of true north is marked in the sky through the north celestial pole. For practical reasons, it is the position of Polaris. However, due to the precession of the Earth's axis, true north, rotate in an arc that takes approximately 25,000 years. In 2002, Polaris was at its closest to the north celestial pole. 2000 years ago, was the star of another celestial north pole Thuban.
The North Star is stationary. Move. Let the earth spin, but the North Star is always in the same night after night. Legal Dipper point to Polaris, which I believe is part of the Big Dipper.
The North Star (Polaris) lies almost directly above the North Pole, then (to move an observer on the ground) very little, while the earth turns. To find Polaris, you use the "stars" pointer of the Big Dipper (Ursa Major) - basically the two stars are forming at the end of "cut" of the bear. Make an arrow "spirit" of the two stars (from the bottom of the cup on the first) and point to Polaris.
If you are the Big Dipper look at the course of a night, you realize that you can be an almost complete circle in the sky without a complete cessation - because it is so far north - the stars and constellations as they are not near a hot rod Polar region.
The North Star is characterized mainly because there are no other stars close to him as brilliant. If you know the north and especially when the pointer stars should be quite clear to the North Star.
North Star is easy to find with the aid of a telescope .. ur Telescope mount assembly in position when it is free in declination and right ascension motion ... turn on the general direction of the north .. Note that this 90 'north latitude, the North Star [and vice versa too!]. located in the north.
And I'm sure you know that the Earth's axis is not perfectly straight and slightly inclined to her .. to be exact, looks at a rate of 23.5. "It is therefore possible.
Hope this helps!
If you live in the desert or at sea without a compass or GPS would be hard to find north if it can not locate the North Star.
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