NEW! Astronomy Projects for Amateurs, Educators & Students

Project 5c: Limiting Magnitude Project

M39: Heidi Schweiker/NOAO/AURA/NSF
M45: Tad Denton/Adam Block/NOAO/AURA/NSF

This project involves observing stars of decreasing faintness in one of three star clusters; Pleiades, Praesepe, M39 depending upon the time of year. Finding charts for each of these three star clusters fpr direct (no star diagonal) and reversed (with star diagonal) viewing are here for downloading.

Enjoy, and we solicit your comments/suggetions/critique at

Download Project

Download M39 Finding Charts

Download Pleiades Finding Charts

Download Praesepe Finding Charts