Buying Guides
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Best Telescope Covers
Keep dust, dew and sun off your scope between observing sessions.
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Best Celestron Eyepieces
Celestron's eyepiece lines compared, so you can pick the right one for your scope.
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Best Travel Telescopes
Backpack, carry-on and smart scopes compared by weight and what they show.
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
Planets travel at different speeds along their orbits around the Sun. Said orbits also become exponentially longer the farther away…
Planets travel at different speeds along their orbits around the Sun. Said orbits also become exponentially longer the farther away…
Planets travel at different speeds along their orbits around the Sun. Said orbits also become exponentially longer the farther away…
Planets travel at different speeds along their orbits around the Sun. Said orbits also become exponentially longer the farther away…
Planets travel at different speeds along their orbits around the Sun. Said orbits also become exponentially longer the farther away…
The 17th century marked a pivotal moment in humanity’s understanding of the cosmos. With the invention and refinement of the…
For those of us who grew up in large cities, the experience of visiting a place with low light pollution…
Finding a meteorite is very exciting. You just found a rock that has been traveling through space probably since the…
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