The photos on display were taken at night by photographers at low latitudes in the northern hemisphere with continuous exposure technology. The arc in the photo is the apparent trajectory of the star.

The photos on display were taken at night by photographers at low latitudes in the northern hemisphere with continuous exposure technology. The arc in the photo is the apparent trajectory of the star. Read the answer

Question 1:C

Question 2: A.

Test analysis:

Question 1: Because the North Pole always points to Polaris, its position in the sky is fixed; Influenced by the earth's rotation, Star A rotates counterclockwise around Polaris. People standing in the North Pole, the height of Polaris is 90o；; People standing in the South Pole can't see the North Star; In the northern hemisphere, the lower the latitude, the lower the height of Polaris. Standing on the equator, Polaris should be on the horizon. So choose C.

Question 2: Because the angular velocity of the earth's rotation is from 1 hour to 15 degrees, the apparent motion of the stars is about 20 degrees 1 hour or more. So choose a.