Buying Guides
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Best Eyepieces for Dobsonians
Eyepieces matched to the fast focal ratios of Dobsonian telescopes.
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Best Star Diagonals
Mirror or prism, 1.25 or 2 inch: the right diagonal for your scope.
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Best Telescopes for Galaxies
Big-aperture scopes for galaxies, nebulae and other deep-sky objects.
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
Mars, Jupiter, and Titan get most of the attention, and they’ve earned it. But the solar system has more than…
Roughly fifty spacecraft have aimed themselves at Mars since 1960. About half of them made it. That failure rate alone…
TLDR Five NASA missions have laid eyes on Ganymede so far — Pioneer 10 and 11 (1973-74), Voyager 1 and…
Table of Contents TLDR If you want one name that reads as strong, easy to say, and not overplayed: Orion.…
TLDR Most star names in use today trace back to Arabic astronomers who catalogued the sky a thousand years before…
Kansas doesn’t get much credit as a spacefaring state. No launch pads, no mission control, just a lot of wheat…
Table of Contents Missouri isn’t the first state that comes to mind for astronomy, and that’s exactly why the observatories…
TLDR The Space Shuttle program flew 135 missions between 1981 and 2011, using five orbiters (Columbia, Challenger, Discovery, Atlantis, Endeavour)…
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