In his book The Hitchhiker’s Guide to the Galaxy, Douglas Adams wrote that the Guide says that: “Space … is big. Really big. You just won’t believe how vastly hugely mind-bogglingly big it is. I mean, you may think it’s a long way down the road to the chemist, but that’s just peanuts to space.”
Although I am aware that space is big, evidence of its vastness still continues to surprise me. Just yesterday, I was listening to a news report about the launching of a rocket to study three of the moons of Jupiter. I was startled when they said that it will take eight years for it to get there. Somehow, the fact that Jupiter is part of the same planetary system as the Earth made it seem like a nearby neighbor, farther than the Moon but not by that much. But if the distance to Jupiter is so much greater than what I intuitively felt, you can understand why interstellar distances seem almost inconceivable.
It is hard to comprehend things that are outside our human scale: the vary small, the very fast, deep time, and deep space. We have developed methods to get some idea of what things are like under those conditions but they are still not intuitive.
