Question

The apparent position of a star keeps on changing slightly because?

• A. the physical conditions of the atmosphere are stationary
• B. the atmosphere scatters star light
• C. the atmosphere consists of a mixture of gases
• D. the physical conditions of the atmosphere keep changing

Answer 1

Answer:

D. the physical conditions of the atmosphere keep changing

The apparent position of stars changes due to atmospheric refraction, which is caused by changes in atmospheric conditions, making option 4 correct.