Question: How do meteors fly through space with no gravity?

Jen Gupta answered on 17 Jun 2011:

Well there is gravity everywhere in space. We stay on the Earth’s surface because of gravity but then the Earth orbits around the Sun because of gravity and the Sun (and the solar system) is orbiting around the centre of our galaxy the Milky Way. Gravity is a really weak force which is why we can overcome it simply by lifting a finger! However the more mass something has, the stronger its gravity. This is why we are currently on a collision course with the nearest spiral galaxy Andromeda – the Milky Way and Andromeda are so massive that their gravity is pulling the two galaxies together, even though they are about 2.5 million lightyears apart!

I think that most meteors come from the asteroid belt which is a load of asteroids that orbit around the Sun between Mars and Jupiter. I’m not 100% sure about the details but I guess if one asteroid collides with another then it can change course and head towards the Earth.The meteor showers that happen every year are because the Earth passes through dust and stuff left by comets.

The other important thing to remember is Newtons first law which says that if something is moving, it will keep moving at that speed unless a force acts against it. In space there is no friction so stuff can keep on moving without anything propelling it.