What is the "cosmological constant?"
A)The universe has existed forever and on the average (over billions of cubic light years)does not change.
B)This is the ratio between "dark energy" and "dark matter."
C)This is a quantity also referred to as "quintessence."
D)This is a self-admitted blunder in his theory of general relativity by Einstein,that might not be a blunder after all.

Question

Quizplus · Accepted Answer

The cosmological constant refers to a value that Einstein added to his theory of general relativity in order to account for a static universe. When Edwin Hubble discovered that the universe was actually expanding, Einstein called the inclusion of the cosmological constant his "biggest blunder." However, recent observations of the accelerating expansion of the universe have led scientists to reconsider the possibility that a cosmological constant or similar energy field exists.

What Is the "Cosmological Constant