In Stock

Easy to understand facts abut Insects, an Arachnid and a Crustacean Full-Color photographs of each Bug Thick and Durable Flash Cards that Child...

Finder Charts are printed on white vellum card stock to make them durable. The black printing and stars on a white background makes them easily rea...

What do you see when you look up into the sky at night? The moon, stars, maybe even a comet or asteroid? You can also see other planets! In Planet...

Take a look through the lens and discover the beauty and science of the magnificent world that is our night sky – and beyond.From the 150km- (93 mi...

This is a replacement for the secondary mirror mounting plate that is included with the HyperStar 6.

This is the top half of the Celestron CPC-925 counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. Inc...

Optolong UHC nebula clip filter for Canon EOS APS-C cameras! The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility ...

All Starizona motors come with the correct gears and tools to attached them. This product is only intended to be used as a replacement.

The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. The UHC (Ultra High Contrast) bro...

This is the top half of the Celestron 11" SCT counterweight set. Use this if you already have a bottom slidebar kit from Celestron or Losmandy. Inc...

Best-selling star chart, ideal for beginning astronomers!These charts are the perfect way to learn the stars and constellations. Simply rotate the ...

Authors: Bruce GrubbsPaperback: 368 pages, 3rd Ed.Lace up your boots and sample 120 of the finest trails in Arizona. Hike the Boucher-Hermit Trails...

When closed, the Bullet Space Pen is the perfect size to carry in your wallet, pocket, purse, car glove box, organizer, or toolbox. When opened it'...

OPEN-BOX ITEM This SCT Corrector IV is an open-box unit. Each open-box item has been inspected and verified by our engineers to be in like-new co...

The DWARF mini redefines portability in a smart telescope.  At only 1.85 lbs (840g), it's the smallest in the world, yet it delivers unparalleled e...

Upgrade your Schmidt-Cassegrain or Maksutov-Cassegrain telescope to accept standard 2" accessories. The internal threads create a secure connection...

This part is used to replace the removable lip on the newer model Starizona Nexus 0.75x coma corrector, providing a male M54 x 1 thread for a direc...

Al Nagler eagerly pushed Ethos designer Paul Dellechiaie to extend the new 3.7mm focal length to reach 110°, the same field size as the LEM Simulat...

OIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with...

Main Use and Performance Use with H-alpha and OIII-CCD extra narrowband filters (SHO Set) for tricolor CCD astrophotography Narrowband imaging wi...

Optolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image ...

L-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is a...

Fits popular telescope mounts sold by Celestron, Meade, Orion, SkyWatcher, TeleVue, Vixen and more. Slotted and counterbored for 1/4 or 6mm socket ...

This double ring set offers improved stability over single camera body mounting rings for using a ZWO camera with a DSLR camera lens.  The ring set...

ZWO’s 16.5 mm M48 spacer is a aluminum extension ring designed to reach optical spacing in imaging systems that require a precise backfocus. It fea...

Extra-Low Dispersion (ED) objective lenses provide high resolution, high contrast images virtually free of optical defects like chromatic aberrati...

The perfect telescope for the small home observatory The Airy Disk 140mm Apochromat represents a top-tier telescope designed to meet the needs...

Replacement 2" holder for Quattro focusers that features a brass clamp ring and much tighter inside diameter tolerance to better hold imaging acces...

M68 Sensor Tilt Plate M68 sensor tilt plate (5mm) is independently developed by ZWO and specially made to match with the full-frame cooled camera Z...

• Waterproof • Tear-Resistant • Stargazer Map and Guide Every culture has drawn pictures in the stars, creating constellations that represent anima...

In astrography, Nikon, Canon, Sony mirrorless cameras have been used more and more frequently by astronomy amateurs in recent years. Therefore, on ...

The Celestron Labs CB2000C Binocular Compound Microscope offers all the advanced features you’re looking for. With 10x and 20x eyepieces and 4 incl...

Celestron’s proprietary XLT fully multi-coated optics increase light transmission through the optical path to deliver crisp, high contrast images ...

Discover a universe of fun and amazing facts about space for kids 6 to 9 Take an exciting, fact-filled journey that goes where all great space boo...

What are constellations? Where did they get their names? What is a falling star? What and where is the zodiac? Is the North Star the brightest star...