Finder-charts
A finder chart is a map of a small region of the sky. Astronomers use these charts to find particular stars within an image.
The charts are also useful for communicating which object on a map is being referred to.
Image
Credit
This work
by Fraser Lewis, Faulkes Telescope Project
is licensed under All rights reserved
Stellar informant
Star clusters are large groups of stars. These clusters provide fantastic (in fact, out of this world(!)) laboratories for us to study populations of stars.