A telescope with a camera so powerful it can photograph a human hair from a thousand miles away, is to be launched by the European Space Agency.
It's on a five year mission to produce the most detailed 3D map of the Milky Way ever.
The camera on the Gaia telescope will measure the size, brightness and position of around a billion stars
It is hoped that it will give us a clearer idea about the evolution of the Milky Way.
Experts think it will help them discover things about our galaxy that no-one ever knew.