Buying Guides
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Best Telescopes Under $500
More aperture and steadier mounts in the serious-upgrade price range.
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Best Zoom Eyepieces
One eyepiece that covers several magnifications without swapping.
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Best Books About Mars
The best reads on the Red Planet, for kids and adults.
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.
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