SUNSET: 
67 results
My Place in the Dark
Twenty weekends and countless trips to the building-supplies store later, I'd done it — I had an observatory to call my own.
Accurate Polar Alignment with Your Telescope
Long-exposure astrophotography requires an accurately aligned equatorial mount.
A Pupil Primer: How Big Should a Telescope's Exit Pupil Be?
Image brightness, magnification, and why the old ideal of a 7-millimeter exit pupil is not so ideal at all.
A Scale of Seeing
Amateurs long have recorded the seeing quality in their observing logbooks on a rather subjective scale of 1 to 10, with 1 hopeless and 10 perfect.
8 Backyard Observatory Mistakes to Avoid
Here are a few potential problems that you might not see on your blueprints.
Binocular Basics: Glossary of Binocular Terms
Exit pupils. Eye relief. Image stabilization. What matters most for astronomers? Our expert explains it all.
Collimation Tools
Three tools are commonly used to collimate Newtonian reflectors.
