Which of the following statements about stellar parallax is true?
A)The amount of parallax we see depends on how fast a star is moving relative to us.
B)Stellar parallax was first observed by ancient Greek astronomers.
C)It takes at least 10 years of observation to measure a star's parallax.
D)We observe all stars to exhibit at least a slight amount of parallax.
E)The closer a star is to us, the more parallax it exhibits.

Question

Quizplus · Accepted Answer

The closer a star is to us, the larger the angle of its parallax, so the more parallax it exhibits. Therefore, statement E is true. Statements A, B, and C are incorrect. Not all stars exhibit measurable parallax, especially those that are very far away. Also, ancient Greek astronomers did not have the technology to observe stellar parallax, and it only takes about 6 months of observation to measure a star's parallax.

Which of the Following Statements About Stellar Parallax Is True