The choices below are for the following questions. For each question, choose the letter for the real motion that is responsible for the apparent motion as seen from Earth.
-A million years from now, Alpha Centauri will no longer be the nearest star system to our own.
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

Stars appear to move randomly in the local solar neighborhood due to their own proper motion, which over long periods can change their relative positions and distances from Earth.

The Choices Below Are for the Following Questions