The article states: "celebrate the scientific legacy of Msgr. George Lemaitre, one of the fathers of the ... 'Big Bang theory'"

The author is simply wrong. Lemaitre, a Belgian Catholic Priest, astronomer and professor of physics at the Catholic University of Leuven, IS the father of the Big Bang Theory, and not "one of the fathers." 

He was the first to propose the expansion of the universe NOT Hubble. He was the first to derive what is now known as Hubble's law and made the first estimation of what is now called the Hubble constant, which he published in 1927, two years before Hubble's article.

And he was the first to propose the Big Bang Theory, what he called "hypothesis of the primeval atom" or the "Cosmic Egg".

Getting the facts straight would help!