Question

1. What is the name of the star which is almost directly above the north pole of the Earth? Draw a diagram to illustrate how an observer in the northern hemisphere can locate this star.

Answer 1

Answer:

Polaris is a north pole star

Explanation:

• It is the brightest star of the northern hemisphere, in the constellation of Ursa minor, being about 433 light-years.Its a triple star system with Polaris Aa, Ab and B star.

• Due to Polaris stars, it lies in direct line with rotation of the earth on its axis above the celestial north pole. The temperature on the Polaris varies with a small amount of pulsation which is variable and unpredictable the temperature cycle can go from 50K to at least 170 K.

• It remains steady for 4 days.