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From dazzling gemstones to sparkling crystals to molten lava, this brilliantly illustrated book introduces children to the exciting world of rocks ...

"A well-illustrated overview of the science and (literal) impact of these space rocks."-- Science News, on the first editionLeading experts in the ...

Get ready to blast off! From Moon rockets to Martian rovers, satellites to space stations, this book is your guide to the ultimate form of transpor...

Unrivaled in its breadth, Universe explores every aspect of the cosmos, from the big bang to planets in our solar system and beyond. Detailed profi...

The crystal cosmos of the ancient Greeks. The medieval sea above the sky. The secret messages hidden in starlight. With thrilling stories and spect...

Explore constellations, stars, galaxies, nebulae, globular clusters, and more. Investigate the planets in our solar system and comets, too! By John...

Space! Jaw-dropping computer-generated illustrations reveal the wonders of teh universe, from the big bang and black holes to space travel. Journey...

The night sky is full of amazing things, but how do you know what you're looking at or how to get the best view? 100 Things to See in the Night Sky...

The 0.75x reducer can bring Askar 91F's focal ratio down to F5, providing not only a faster focal ratio but also built-in field-flattening correcti...

A flash, a single streak of light, is what sparked David Levy’s passion for astronomy more than sixty years ago. In this delightful collection of e...

A fully illustrated, portable guidebook for enjoying the night sky in 2026. Night Sky Guide 2026 is the ideal resource for both novice and experien...

An international fleet of unmanned lunar probes sent by the United States, Russia, Europe, India, Japan, and China has filled many gaps in our know...

A fully illustrated, portable guidebook for enjoying the night sky in 2027. Night Sky Guide 2027 is the ideal resource for both novice and experien...

Use this visual back to attach a 2" diagonal or other 2" accessories to the back of a Schmidt-Cassegrain telescope using the standard 2"-24tpi thre...

Optolong L1 Dual-Combo Set Two approaches to the deep sky. The Optolong L-Quad Enhance + L-Para Filter Set pa...

The Optolong L-Ultimate 2" filter is a precision 3nm dual-narrowband light-pollution imaging filter designed for high-contrast emi...

Designed with the outdoor enthusiast in mind, waterproof and fully rubber armored Phase coated BaK-4 prisms for increased contrast and resolution ...

Celestron’s award-winning Nature DX 12x50mm binoculars are the perfect companion for your next outdoor adventure. The views through Nature DX riva...

Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 62° Series eyepieces are excellent flat-field multi-eleme...

Observatory-Class Precision Mount Astro-Physics 1150GTO Precision tracking. Serious payload capacity....

1.0x flattener Compatible with Esprit 70EDX and Evostar 100EDX 44mm image circle Designed for the Sky-Watcher Esprit Esprit 70EDX and the Evostar...

The Antlia 3nm Pro SHO Narrowband Filter Set combines three 2" mounted filters—Sulfur II, H-alpha, and Oxygen III—for high-contras...

Used Celestron Luminos 31mm eyepiece.  Very good condition.  Includes original caps, no box.

Used Explore Scientific 14mm 100-Degree eyepiece.  Excellent condition.  Includes original caps, no box.