In this first instructable I show you how to make a spectroscope that can be adapted to your telescope. But the first question is : what is a spectroscope, and what is it useful for? Good question.

The basic principle is very simple : when a star burns its fuel, it emits a certain color of light, and when it emits a certain number of wavelength, the light seems to become white. But with a spectroscope, you can divide this light. And so you'll be able to know what is a star composed of! Personally, I think it brings your observations to a next level.

Let's make it!

PS: every picture used in this instructables are my own