Earthed

Would the gravity of Earth change if it were moved to different locations of the Universe?

Some of the questions that I am curious of.



1. If everything in the Universe were to disappear, what would happen if a large mass such as Earth or the Sun were to pop back into existence? Would anything strange happen to gravity?



2. Would I weigh the same on Earth if Earth no matter what location it came to rest at in the Universe?



3. If Earth could travel at different speeds, could this change how much I would weigh standing on Earth?

Public Comments

1. No. Earth's gravity is a function of its mass and our distance from its center of mass, not its position in space. Remember, it is always moving to new space as it circles a sun that is orbiting the Milky Way. We've never been in the same part of space in our lifetimes, and it was 250 million years ago that the sun was in this part of its galactic orbit last.
   
   
   
   
   
   1. If everything in the Universe were to disappear, what would happen if a large mass such as Earth or the Sun were to pop back into existence? Would anything strange happen to gravity? It wouldn't be expected to. Gravity would temporarily cease to exist in the massless universe. If only the earth returned with nothing on or around it, it's gravity would affect nothing, and nothing would exert a gravitational pull on the earth. If the earth returned with just you on it, gravity would feel normal to you.
   
   
   
   2. Would I weigh the same on Earth if Earth no matter what location it came to rest at in the Universe? Yes, as long as there were no other gravitationally significant objects nearby. If you moved us to an orbit around Jupiter, Jupiter would pull you and change your weight, making you lighter if it was over your head (maybe even pulling you and earth to it if it wasn't in orbit) and heavier if it was below your horizon.
   
   
   
   3. If Earth could travel at different speeds, could this change how much I would weigh standing on Earth? Technically, yes, but practically, no. If the earth spun like a pulsar, 30 times or more a second, that movement would increase your weight catastrophically. But that's rotational motion. Translational movement would not affect your weight or gravitational experience in a way that you could sense.
2. 1. no because earths gravity is caused by earths mass. keep
   
   earth's mass the same and earths gravity is the same
   
   2 for all practical purposes you would weight the same. technically speaking the moon pulls on you which makes you weigh less by a fraction you cant feel or measure.
   
   3yes the earths motion in a circle can make you weigh less due to centrifugal force. you already weight less at the eqator than you do at the pole because of earths roation creating centrifugal by spinning about its axis. spinning and orbiting if done fast enough is circular motion which produces centifugal