Cepheid Variables

Question 1

Who is Henrietta Swan Levitt?

Answer 1

A woman who helped to prove that the universe is expanding and that the brightening and dimming of Cepheid stars is a linear relationship. She did this in the early 1900’s.

Question 2

What are Cepheid Variable Stars?

Answer 2

Very massive and extremely bright stars. These stars also continuously dim and re-brighten in a cycle.