Local Retailers

A local astronomy outreach business, located in Frederick, MD. They take a portable inflatable planetarium and digital projector around to area schools and other organizations and present programs that teach astronomy.

– Montpelier, Maryland

General

View a different picture with an explanatory caption each day.  Past pictures are archived.

An excellent one-stop source for everything astronomy online. Contains a plethora of links, grouped by category for easy navigation.

Media & Magazines

A great site for tips on the hobby.

The UK’s best-selling astronomy magazine.

Sky & Telescope, the Essential Magazine of Astronomy. News, observing tips, how-to advice, and more!

Equipment & Reviews

Essentially the eBay of astro gear, this is the most popular site on the web for selling used equipment.

Equipment reviews, Classifieds as well as the internet’s most popular astronomy forum.

A compendium of user-submitted reviews of their astro equipment.

Astronomy Mall

Surplus Shed

Teletrade

Hands on Optics Fun List

Company 7’s Consignment Page

Canada Wide Astronomy Buy & Sell

Germany’s APM Secondhand

Online Tools

Brought to you by the British Nautical Almanac Office, this is a great site for researching past and present eclipses. You can search by location and/or year. For each eclipse, there are diagrams as well as an animation of the eclipse.

Contains a searchable database of observing reports submitted by people across the web.

There’s so much here that this is essentially a one-stop resource for all your online observing tools. From an astro almanac, to simulations of the Moons of Jupitor, to the minima of Algol, there is an impressive array of utilities at your disposal here.

An interactive sky chart that lets you view the sky from any place on Earth between 1600 and 2400 AD.

An online sky chart.

Interactive ISS Site