That was the thought a long time ago until this guy noticed something:
George Lemaitre. Astronomer, mathematician, physicist and priest. He noticed something interesting.
Objects were moving away from us. And the further away they were the faster they were going. So he worked backwards and said, “if they’re moving away from us then they must have been closer in the past”.
Up until then the model of the universe was the “Steady State” which was that the universe was always there and had no beginning. The scientists of that day agreed and dismissed George’s idea because it was, and I love this bit, “too close to creationism”.
That’s right. Scientists thought the idea of a starting point made it too similar to a religious concept. The fact that a priest brought it up made it even more suspect. But like all good scientists they examined the evidence, did the work and figured out, “yeah, he’s right”. Except of course all scientists are in agreement that it started 13.77 billion years ago and not less than 10,000 years as some religious types think.
EDIT: If you’re a Christian or religious type please don’t come here to preach. I’m not interested and you just accomplish getting muted, blocked and your comment removed. You want to believe in God and he made the universe and everything? Great. Goody for you. I don’t care. Please make your own post to the question talking about that but this isn’t your soapbox.
EDIT 2: And like clockwork religious nutbars show up and cry foul when asked, politely, not to preach.
This is why we can’t have nice things. Religious people ALWAYS have to screw it up for the rest of us.