The universe is incredible! Even though it's my field of study, the size of astronomical objects keeps impressing. The smallest dwarf star is mindbogglingly gigantic compared to the human scale, and yet it looks like a grain of dust compared to giant stars like Arcturus!
For example, the Orion Nebula (my subject of study) is located a thousand light years from Earth... but it's still twice as big as the moon in the sky! (It's just really faint, you either need good binocular or a telescope to see it.)