What is Einstein's cosmological constant?
A)the value of the expansion rate of the universe
B)the value of the acceleration of the universe
C)the value that measures the strength of gravity across the universe
D)the size of the cosmological horizon
E)a repulsive force that counteracts gravity and was introduced to allow for a static universe

Question

Quizplus · Accepted Answer

Einstein introduced the cosmological constant as a repulsive force that counteracts gravity and allows for a static universe. However, later observations showed that the universe is actually expanding, which rendered the cosmological constant unnecessary.

What Is Einstein's Cosmological Constant