The size of the universe is nearly impossible to fathom because our brains have never been exposed to anything remotely close to its magnitude. To help put this in better perspective, consider the following facts: if you could take a nonstop flight around the Earth, it would take 44 hours. The diameter of the Earth is 7,926.41 miles. The Moon, which is getting further and further away from the Earth, is 238,855 miles away. The Sun is 93,000,000 miles away. Now keep these distances in your head when you watch the following video:
