what is there in space. why there is less gravity or no gravity in space?

Answer 1

It is wrong to say that there is no gravity in space. This is why you hear astronauts use the term "microgravity".

Gravity is a property of mass. All objects have mass and thus attract other objects with mass. It takes a lot of mass for this effect to be noticable. Here on Earth, the Earth is massive enough that we notice it! Gravity holds us too the Earth. The farther you go from the center of the Earth, the weaker the gravity becomes. For example, the pull of gravity is slighty slightly weaker on Mt. Everest than it is at the beach.

You'd have to go very far into space for this pull to become half as strong as it is here on Earth.

The reason astronauts and other things in orbit float is because they are in a perpetual state of free fall do to the fact that the Earth is curved and they are traveling around it at such great speeds that for every foot they fall towards the ground, they move over the horizon just enough that the ground doesn't have a chance to get closer. If the astronauts remained stationary over one point on Earth then they would fall to the ground.

This is true for anything in any stable orbit. If the Earth were to stop moving around the sun for some reason, it'd fall into the sun.

There ARE points in space where we can say gravity due to the net force of two or more objects is zero. If you were traveling between the Earth and Moon, or the Earth and Mars, or any two massive celestial bodies, you will find a point where the pull from one body is equal and opposite to the pull from the other body. This is like a balancing point. A little closer to the Moon and that becomes the object which you're falling towards, and a little closer to Earth and that becomes the object which you're falling towards.

There is also theoretically a distance in space where you could be so far away from anything that the pull of gravity on you is negligable....but not zero.

So in space you are actually always falling towards something. Comets enering the solar system are ultimately falling towards the sun. The astronauts are falling towards Earth without actually getting any closer, the Earth is falling towards the sun without getting any closdr, the sun is falling towards the center of the galaxy without getting any closer.

I hope you get the idea.

Answer 2

Gravity requires the presence of mass to exist. In space, far from stars, planets, etc., there is very little gravity. Near planets and stars, there is gravity, though it may not look like it from the videos we see of folks in the space shuttle.

The shuttle and space station are in orbit around the Earth. Being in orbit means that they are travelling so fast, that although they are falling toward the center of the Earth, they miss the planet!

Answer 3

Space is full of gravity. Everything in space is in some kind of orbit (and usually several orbits), each of which is caused by gravity.

There is no **weight** in space, though, because weight is the force of gravity pushing against something, and in space there is nothing to push against. It is because there isn't anything to push against that things in space are moved by gravity, rather than weighted by gravity.

Answer 4

There is gravity in space, just nothing to create friction other than other objects moving because of a gravitational pull toward something larger. IE, Planets, Asteroids.

Answer 5

THere is no gravity in space because, just as Einstein said, there has to be mass to bend space and pull matter to it.

Answer 6

think of space as a flat rubber mat. If nothing is on it to put a "pucker"aka gravity- theres no force to attract to!

Answer 7

gravity requires mass. space has no mass.

Answer 8

space is empty. it contains cosmic dust particles floating.
gravity acts between 2 or more bodies. so we need any particle to attract anyother particle.

Answer 9

my answer was bad ...removing it