A Priest Who Saw the Universe Expanding
The Story of Georges Lemaître and the Big Bang

Shariq Ali
Valueversity

In history, there was a man who led prayers in church and at night solved mathematical equations about the vastness of the sky. He was both a priest and a scientist. His name was Georges Lemaître.
In 1927, when most scientists believed the universe was static, Lemaître presented a bold idea.

The universe is not static۔
It is expanding.
Through mathematical calculations, he showed that distant galaxies are moving away from us.

Later, this relationship became famous as “Hubble’s Law,” though years afterward it was acknowledged that Lemaître had already laid its foundation.

Today it is known as the “Hubble–Lemaître Law.”
In 1931, he proposed another astonishing concept.

According to him, the universe had not always existed. Instead, it began from an extremely dense and concentrated state. He called it the “Primeval Atom.” This idea later became known as the “Big Bang Theory,” although the term “Big Bang” was originally coined by someone else in a somewhat mocking tone.

Interestingly, Lemaître never tried to turn his theory into a religious argument. He clearly maintained that science and faith belong to separate domains. It would be incorrect, he argued, to present a scientific model as direct proof of God. This intellectual honesty was one of the most beautiful aspects of his character.

Even today, a century later, questions remain about the rate of the universe’s expansion. Issues such as the “Hubble tension” remind us that the story is not yet complete.

A priest once raised a question about the beginning of the universe.
And humanity is still revolving around that very question.