In the year A.D.15,000,Vega will be a better north star than Polaris.
A)Earth rotates once each day.
B)Earth revolves around the Sun once each year.
C)The direction of Earth's axis in space precesses with a period of 26,000 years.
D)Stars appear to move randomly in the local solar neighborhood
E)The universe is expanding.

Question

Quizplus · Accepted Answer

The change in the direction of Earth's axis in space is known as precession, and it has a period of around 26,000 years. As a result, the positions of the stars gradually change over time, and the North Star (or pole star) also changes. Polaris is currently the North Star, but due to precession, Vega will be a better north star in the year A.D. 15,000. The other options are not relevant to this phenomenon.

In the Year A