Gggggghosts!
The earth rotates at about 1000 miles per hour, and we orbit our star at approximately 66,000 miles per hour.
But then our star is also moving. Among the local collection of stars that we are in, our star is moving at about 43,000 miles per hour. It is moving relative to our local arm of the Milky Way, heading roughly towards the direction of Vega.
But our star and the arm of the galaxy we are in also rotates around the middle of our galaxy. Sort of like a pinwheel. Our star is orbiting the galaxy center at something like 483,000 miles per hour. That is 143 miles EVERY SECOND.
But wait, there's more! Our galaxy is part of a local group, and it is also moving. We are heading towards a collision with another, MUCH LARGER, galaxy. We are going to slam into Andromeda at 250,000 miles per hour in about 4 billion years or so.
So we are spinning quickly on a rock that is running circles around a star that is running away from it's family in a cluster that is circling a galaxy that is going to have a big car wreck with it's neighbor some day.
Everything is moving.
Why is that important?
Ghosts are bound by gravity just like us. Otherwise ghosts would just be out in the middle of the universe wondering where the hell Earth went.
But then our star is also moving. Among the local collection of stars that we are in, our star is moving at about 43,000 miles per hour. It is moving relative to our local arm of the Milky Way, heading roughly towards the direction of Vega.
But our star and the arm of the galaxy we are in also rotates around the middle of our galaxy. Sort of like a pinwheel. Our star is orbiting the galaxy center at something like 483,000 miles per hour. That is 143 miles EVERY SECOND.
But wait, there's more! Our galaxy is part of a local group, and it is also moving. We are heading towards a collision with another, MUCH LARGER, galaxy. We are going to slam into Andromeda at 250,000 miles per hour in about 4 billion years or so.
So we are spinning quickly on a rock that is running circles around a star that is running away from it's family in a cluster that is circling a galaxy that is going to have a big car wreck with it's neighbor some day.
Everything is moving.
Why is that important?
Ghosts are bound by gravity just like us. Otherwise ghosts would just be out in the middle of the universe wondering where the hell Earth went.