The period-luminosity relationship for Cepheid variable stars,relating variability to absolute overall brightness,thereby providing identifiable beacons throughout our local space,was discovered by:
A) Harlow Shapley.
B) Henrietta Leavitt.
C) Edwin Hubble.
D) Sir Isaac Newton.

Question

Quizplus · Accepted Answer

The period-luminosity relationship for Cepheid variable stars was discovered by Henrietta Leavitt while working at Harvard College Observatory in the early 1900s.

The Period-Luminosity Relationship for Cepheid Variable Stars,relating Variability to Absolute