Buying Guides
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Best Refractor Telescopes for Beginners
Low-maintenance scopes that are ready to use the night they arrive.
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Best Barlow Lenses
Double or triple every eyepiece you own. 2x, 3x and 5x picks compared.
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Budget Telescopes That Are Sneakily Powerful
Five low-cost scopes that perform well above their price.
Free Resources
Space Printables
Free PDF quizzes and worksheets for kindergarten to adult, with answer keys.
3D Space Models
Spin real maps of the Moon and planets built from NASA data. Find craters, landing sites, the rings of Saturn, Uranus and Neptune and the moons of Jupiter.
Latest
TL;DR “Recent comets” can mean two different things: comets newly discovered by astronomers, and comets that are actually worth looking…
Europa is one of the most tempting places in the Solar System to look for life, and NASA has spent…
Black holes are not all the same size, and they don’t all form the same way. The types of black…
Massachusetts has a surprisingly solid astronomy scene for a small state packed with traffic, colleges, and weather that enjoys ruining…
North Carolina has a better planetarium scene than most people expect. You’ve got big-city science centers, university-backed domes, and a…
Constellations are patterns of stars that people have named and used for thousands of years. Some are easy to spot,…
Table of contents TLDR The 18th century astronomers who matter most are the ones who turned astronomy into a precision…
Oregon is a good state for astronomy in the same way it’s good for mushrooms: the conditions are often excellent,…
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