The Cosmological Constant

TL;DR

This paper clarifies the historical development of the cosmological constant, emphasizing Einstein's initial considerations and later adoption in cosmological models, challenging common misconceptions.

Contribution

It provides a historical analysis of Einstein's reasoning regarding the cosmological constant, highlighting its conceptual evolution and significance.

Findings

Einstein initially dismissed the cosmological constant as unnecessary.

The cosmological constant became essential in Einstein's later models.

Historical context clarifies misconceptions about its origin.

Abstract

Contrary to popular mythology, Einstein did not invent the cosmological constant just in order construct his model universe. He discussed it earlier in "The Foundations of General Relativity" in connection with the proper structure of the source-free field equations. There he dismissed it as arbitrary and unnecessary. It was later that he found its inclusion to be essential to the construction of his model.