Here's how it works:

* Gravity is a fundamental force: It's one of the four fundamental forces of nature, along with electromagnetism, the weak force, and the strong force.

* Mass creates gravity: Every object with mass exerts a gravitational force on every other object with mass. The more massive an object is, the stronger its gravitational pull.

* Distance matters: Gravity weakens with distance. The farther apart two objects are, the weaker the gravitational force between them.

Examples of gravity in space:

* Planets orbiting stars: Planets are held in orbit around stars by the star's gravity.

* Stars forming galaxies: Gravity pulls stars together to form galaxies.

* Galaxies clustering: Gravity also attracts galaxies to each other, forming clusters and superclusters.

It's important to note:

* Gravity isn't the only force at play in space. Other forces like electromagnetic forces and nuclear forces also play significant roles.

* Gravity is a very weak force on a small scale, but it becomes dominant over long distances and with large masses.

Let me know if you have any more questions!