Why the planet and the sun stay where they are without falling?

Answer 1

Where exactly do you think they would fall to?

You seem to be trapped into an earth-view, where you drop something and it falls "down".

Space doesn't have a "down".

Answer 2

The idea is that EVERYTHING has its own gravity. And two objects drifting in the vacuum of space will inexorably be drawn together. Huge things like planets would be drawn together too or into the Sun except their original trajectories mean that rather than crash into it or each other only their gravity catches each other. We see it happen with comets all the time. Some of them are in permanent neat orbits around the Sun while most, every time they approach, are caught by the Suns gravity and pulled toward it. Most of them are travelling too fast to get pulled right into the Sun and the force of the Sun's gravity makes them fly even faster so they merely fly around it and are slung-shot off into a new trajectory. Our planets are also caught up in a fairly neat orbital pattern. A thing called centrifugal force (the balance between their speed and the Sun's gravity) stops them being pulled closer and into the Sun or from flying away.

Since ethere is no up or down in space there can be no "falling" as such.

Answer 3

Gravity is a force of attraction only between bodies that have mass.

If no other objects are near the moon, its not going to have a force to fall into as is it far enough from the earth not to be pulled in. Also the moon rotates around earth and all in our solar system around the sun due to the huge gravity forces and rotation of our solar system.

Don't worry, the sky isn't falling.

Answer 4

Planets do not stay where they are.

They are flying through space at incredible speeds like 30,000 miles per hour or something like that, in circular and eliptical orbits around the Sun. The Sun is also moving through space.
Nothing is fixed in space at a particular finite position.

Answer 5

In order to fall somewhere, you need a reference point; like the ground. But out in space, there is no "ground" So in space, there is not such thing as up, down, right , left. There is only going away from some object (like planets or Stars) or going toward some object.

Answer 6

We are falling. . .

We are falling towards the Sun, but since we are also flying away from the sun, we circle about it endlessly (actually we ellipise around it endlessly). This is called Orbit.

Also, the sun is falling towards the center of the galaxy in the same way.

Turtles do sound simpler. . .

Answer 7

In fact, they ARE falling -- around each other. The gravitational force attracting them is counterbalanced by the inertial force tending to separate them. To experience this force, tie a string to something and swing it in a circle around your head; the tension on the string arises from the inertial force, and the pull which you provide to offset it corresponds to gravity.

Answer 8

Actually, our entire galaxy is 'falling' through space, though at that scale there is no up or down, we are falling toward our neighbor galaxy Andromeda. We should collide with it in about 3 billion years.

Answer 9

Falling where? It's called space...

I think it's time for you to wake up during class.

Answer 10

Space is infinate there is no place for them to fall. Also there is no gravity is space pulling them down.