Why doesnt the suns gravity cause all the planets to crash into the sun?

Answer 1

The planets and other small bodies of the solar system are affected by gravity. But just like the satellites that orbit the Earth, they are rapidly orbiting around the Sun*. This forward speed (their inertia) means that gravity cannot pull them in a straight line into the Sun. Instead, they "fall past" the Sun in orbits that are reasonably stable, encountering little resistance from the near-vacuum of space. As well as having moons (mini-planets of their own), planets are affected by the gravity of other planets, and have established orbits that only change very, very slowly. *The velocity of the planets varies according to the distance at which they orbit, and is a remnant of the rapidly spinning disk of gas and dust from which the Sun and planets were formed. Everything on the Earth is moving at a velocity of 29.783 km/s (107,218 km/h), counterclockwise as seen from the arbitrary terrestrial "north".

Answer 2

This is because the Earth is moving fast enough to cancel out the sun's gravitational pull.

The effect of gravity is to cause the Earth to curve continuously towards the Sun, making it go round in a stable orbit.

Answer 3

Because the planets and other bodies in the solar system have a velocity opposing the suns force of gravity. The net result is that the planets neither escape from the solar system or are taken in by the sun - they end up in orbit around it.

Answer 4

Simply put, the planets are moving too fast. The sun's gravity constantly pulls the planets toward it, but they are moving so fast that by the time they would have hit it they have missed by millions of miles. This is basically how an orbit works.

Answer 5

The planets are constantly pulled toward the sun by gravity, but they are moving "sideways" so fast relative to the sun that they continuously miss the sun by a great distance.