The Big Bang theory.
Georges Lemaitre
Father Georges Lemaitre.
Georges Lemaitre.
Proposed the Big Bang Theory.
Georges Lemaitre proposed the Big bang in 1927.
Jesuit priest Georges LeMaitre, doing so in 1927.
Georges Lemaitre proposed a concept which later, became popularised as 'The Big Bang Theory'
Astronomy: Georges Lemaitre [See related question]TV Series: Chuck Lorre and Bill Prady
Alexander Friedmann was the first to take the equations of Special Relativity and show that one solution -- amongst others he found -- was an expanding universe. His effort was purely mathematical, and he made no claim that his solutions had any relation to our actual Universe. Jesuit priest Georges LeMaitre was the first to scientifically develop the idea that our Universe was, indeed, expanding, and that this fact would explain red shift of distant "nebula" (his words, these were later found to be galaxies). He later suggested that our entire Universe was once incredibly dense and hot, and expanded to its present state.
I'm unaware of who wrote the first book on the theory, but it was first postulated by Georges Lemaitre in the 20's.
Jesuit priest Georges LeMaitre was the first to propose that we exist in an expanding universe, and that observable evidence exists to support this idea.
No. Georges LeMaitre was one of the first people to come up with the notion of a Big Bang. Charles Darwin was a biologist, not a physicist or astronomer.