Georges Lemaître: Priest &amp; Scientist; Father of the Big Bang Theory; He was the first to derive what is now known as Hubble&#x27;s law and made the first estimation of what is now called the Hubble constant, which he published in 1927, two years before Hubble&#x27;s article. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Georges_Lemaitre" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Georges_Lemaitre</a>