Question

A star with a parallax angle of 0.1 arcsecond is away from us. What can be inferred about the star?

A) It is nearby
B) It is far away
C) It is moving towards us
D) It is moving away from us

Answer 1

A star with a parallax angle of 0.1 arcsecond is likely to be nearby.

Step-by-step explanation:

A star with a parallax angle of 0.1 arcsecond indicates that the star is relatively nearby. Parallax is a method used to measure the distance to stars, where the shift in a star's position is observed from opposite sides of Earth's orbit. The closer the star, the larger the parallax angle. Therefore, a star with a parallax angle of 0.1 arcsecond is likely to be nearby.