Why are the distances of a star hard to measure?
- Stars are so far away that the time taken for the signal to return would be years for the nereast stars.
- Any refelcted signal would be so weak that it would be undetectable due to background signals.
- Stars are spheres of gas; therefore they do not have refelctive surfaces.
What do astronomers use to measure the distance of a star?
Astronomers use observations to determine the distance of a star.
What is parallax?
Parallax is the apparent motion of near and more distant objects with respect to one another.
How does it work?
If the angular…