The universe is unimaginably large. And we don’t mean unimaginably large like the Grand Canyon. That’s huge, but we can actually see enough pictures of it to wrap our tiny little mammalian brains around the concept of its size. We can’t do that with the universe. For example, our sun can fit 1.3 million Earths inside of it. Try to visualize that. You can’t! We have absolutely no frame of reference and can’t even begin to imagine how large that it. And here’s where things start to get crazy.
There are stars out there thousands (if not millions) of times larger than our sun. Yet, if we can see them at all, they’re only a faded, pale dot in the sky because they’re so far away. See? The universe is literally so large you can’t imagine it. And 99.999999% of it is unknown and unexplored to us. That’s why it’s so easy to believe that, statistically, we can’t be the only living beings out there. And while that may excite some, it terrifies others…