Stelalr distances (the distances of stars)


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…


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