Tell us what you want to see, whether you want your telescope to be portable and your spending priorities. Our free Telescope Finder suggests a starting setup, product options, and a checklist of accessories to consider.
Free to use. No signup required. Or browse our guides below.
Guides to help with your Stargazing Adventure
Information on Galaxies, Stars, Constellations, Planets, Moons, Comets and Asteroids
Listen to Bernard Miller describe his journey into AstroPhotography and detail how he captured this stunning image of the Sculptor Galaxy.
Read the full article here.
Drew Evans talks about his passion for astrophotography, the equipment used and tips for post processing image data.
Read the full article here
Hear D.j Van Bourgondien as he talks about using his Celestron EdgeHD 8″ telescope to capture this image of the Fireworks Galaxy
Read the full article here
Get your free e-Book downloads, just click on the button below.
Below are a selection of our Articles, to find more click on one of the sections above, or use the Menu at the top of the page.
Learn how stage micrometers and eyepiece reticles calibrate microscopes, create accurate scale bars, and reduce measurement error in light microscopy.
Explore Europa’s subsurface ocean, habitability, geology, plume evidence, and upcoming missions like Europa Clipper and JUICE in this in-depth guide.
Table of Contents What Do Numerical Aperture and Magnification Mean in Microscopy? Optical Resolution Limits: Diffraction, Wavelength, and NA Illumination, Contrast, and How NA Affects Brightness Common Magnification Traps and Empty Magnification Resolution Versus Contrast: Why Sharper Is Not Always Clearer How to Choose Objective NA, Working Distance, and Field Condenser Aperture and Matching NA […]
