What are the two most important jobs a telescope does?

1. Most objects astronomers study are far too faint for the eye alone. 2. A telescope first acts as a bucket that gathers the faint light. 3. It then brings all that light to a focus so it forms an image. 4. Magnifying is the job of the eyepiece, and recording is the job of the detector. _Source: OpenStax Astronomy (CC BY 4.0), section 6.1 Telescopes_