Backyard Stargazing – Spring 2020

Backyard Stargazing is a surprisingly simple and rewarding experience. In just one night you can learn to identify constellations and find objects like Globular Clusters, Nebulae, Supernova Remnants, Double Stars, and more!

New Feature – Billie’s Blog

Billie’s Blog is a new feature on DavidChandler.com bringing you quick bits of interesting information, explanations, Astronomy News, and general information for the amateur astronomer.

How to Use The Night Sky – Quick Guide

With The Night Sky™ planisphere you will be up and running and locating constellations within minutes. The most popular and lowest distortion star chart on the market.

Planisphere or App?

Now that smartphones and tablets have become ubiquitous many people ask us why we don’t publish a planisphere app instead of continuing to sell physical planispheres. The answer is that, in this case, there are several advantages to the physical format. more…

Why the Red Light?

Why do you need a red light to read your charts at night? It can take up to 45 minutes for the human eye to completely adapt to darkness as a protein called Rhodopsin builds up in the rod cells. Once your night vision is adapted you might be surprised …

Latitude Selector

You should choose a planisphere version based on the location from which you will be observing. Each latitude version of The Night Sky is optimized for the specific latitude zone to provide accurate horizons and minimum distortion.
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2015 Okie-Tex Star Party

The 2015 Okie-Tex Star Party is now history. We would like to extend our sincere thanks to the organizers at the Oklahoma City Astronomy Club for all of their hard work in preparation and their efforts at the event. Everything went amazingly smoothly and the night skies were the best we have seen this year. Having […]

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The Distortion Solution

The map projection used for any planisphere is a flat representation of our spherical view of the cosmos.  Some distortion of distance, scale, area, etc. always results from this process.  In map projections commonly used in planispheres this distortion increases geometrically as distance from the center increases.  In conventional planispheres the distortion can be extreme which makes […]

Summer Meteor Showers

Summer is a great time to be outdoors at night with clear skies and the prospect of seeing a shooting star. As you know, a shooting star is the common name for the bright streak of light given off by a meteor as it streaks into Earth’s atmosphere and burns up from the heat caused […]

Rocky Mountain National Park Night Sky Festival

The first Rocky Mountain National Park Night Sky Festival is now history.  The park rangers put on a variety of astronomy related programs free for park visitors including opportunities to view the cosmos through a variety of telescopes and interesting presentations by professional astronomers and aerospace experts.  Over 300 visitors attended the presentations and public […]