Why do stars don't fall off or what keeps them from falling from their perch in the space?

Question

Example: Why does our sun remain where it is ..why does it not fall towards the star below it ...and I am sure we have stars and celestial bodies all around .how do they keep themselves stable in space.

Answer 1

A partial answer is that nothing is really stable in space; everything is moving. Some stars are moving toward us, others away. We don't notice these movements because of the large distances involved, but you would be able to if you could live long enough. For example, within 100,000 years, the Big Dipper will no longer look like a dipper, because the stars will be in different positions in the sky.

Another partial answer is that there is no objective "up" or "down" in space. Those are concepts that we have developed because of our own experience on Earth. For example, if you were to point straight up, and a person on the other side of the world from you were to point straight down, you would both be pointing in the same direction. And as the Earth turns, that direction would change for both of you. We are very small and near compared to Earth, so its gravity has a strong effect on us. But stars are smaller and far away relative to our solar system, so their gravity has less of an effect, sometimes even essentially zero (individually).

Another partial answer is that it is believed that if the universe has enough mass within it, it will indeed eventually (billions of years from now) begin contracting until it again becomes a single point (and then likely go through another "Big Bang"). For the most part, the stars and galaxies are moving away from one another at increasing speed, so the combined effect of gravity is decreasing. But if there is enough mass, the galaxies should eventually slow, then stop, then start moving back toward each other. This is what the questions over "dark matter" are about -- whether the universe will contract, or keep expanding forever.

Answer 2

There is no star "below" the sun, because "below" has no absolute meaning in space. Stars don't "fall" towards other stars because stars are very far apart from each other relative to their size, so the gravitational attraction between stars isn't strong enough to be noticable on a human time scale.

Answer 3

The main reason why the sun and other stars aren't "falling" is because in space, there is no air, no center of gravity (there IS no gravity).

Another theory suggests that the sun has some sort of magnetic "ray" that is reverse polarity of other suns and star systems. Of course, this theory is nearly kaput, mainly because it's impossible to have such a strong magnetic force to repel from other systems. Also, if ALL other systems are reverse polarity of our sun, it means that every star system is of the same polarity (unless there are billions of different polarities) and they would attract each other (most likely causing super novas so brilliant that it would decimate everything within billions of lightyears).

Stars and systems are always moving. It's impossible to say "That one star system over there", because "that one star system" might be in one place one year then the next year it might move a couple of centimeters (to our eyes, of course. "A couple of centimeters" might be billions of miles in space but we can't tell from our naked eyes because they're so far away).

Answer 4

The centripetal force of revolving around the black hole at the center of galaxies.

Answer 5

There's a little man holding it up

Answer 6

There is no gravity!

Answer 7

gravity im guessing or god