What factors to be taken into consideration to view the polestar at your place
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Answers
1. Latitude of one's location. This decides the angle of elevation of Polaris or Pole star. If we are in the Northern Hemisphere, we see Polaris. If we are in the Southern Hemisphere, we see a southern pole star. Southern pole star is not very close to the axis of Earth. It is about 1 deg. away. It is called Sigma Octans.
2. Clarity in the sky or haziness or fog clouds, affecting visibility.
3. Use the two groups of stars "Big Dipper" and "Little Dipper" to locate pole star Polaris.
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Pole star or Polaris star. (Northern Hemisphere)
This star is linked with Mythological character “Dhruva”. He was a great devotee of Lord Vishnu. Polaris always points North in the Northern hemisphere. It is a navigation tool for people at the sea. Pole star is visible every night. It is better to locate Pole star in a Clear sky.
To locate it:
1. Look for easily recognizable pattern of stars first in the sky. That is the Big Dipper or the Plough, part of the (Ursa Major) Great Bear constellation. Big Dipper is called “Saptarshi Mandal”. It is sauce pan or ladle shaped. Join the last two stars in the bowl part, Merak and Dubhe in a line. This line points to the Pole star. The distance between Dubhe and Polaris is about 5 times the distance between Merak and Dubhe.
Pole star is reasonably bright star in its region. Note that it is not the brightest star. It is almost directly above the North Pole of Earth. The axis of Earth passes almost through it. It is used to measure the latitude. The angle of elevation of Polaris above Horizon is 0 deg on the equator.
2. There is a little Dipper (Ursa Minor) also in the sky. Those stars are less bright. Big dipper and little dipper are arranged in opposite directions. (upright and upside down). We should not confuse one for the other. Pole star is the last star on the handle of the Little Dipper.
