Buying Guides
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Best Telescopes for Galaxies
Big-aperture scopes for galaxies, nebulae and other deep-sky objects.
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Best Space Books for Kids
28 picks sorted by age, from board books for toddlers to Apollo history for teens.
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Best Telescopes Under $500
More aperture and steadier mounts in the serious-upgrade price range.
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
In episode 21, season 11 of The Big Bang Theory called The Comet Polarization, Penny discovers a new comet. I’m…
Asteroids are a very unique type of object in the Solar system. Starting from their definition. An asteroid is a…
Moons, galaxies, and stars are famous for having cool and interesting names inspired by mythology, fauna, literature, or other sources.…
The interest in space exploration has seen an important resurgence in recent years thanks to the efforts made by NASA…
The best telescope under $100 is the Celestron Travel Scope 70, a 70mm refractor with two eyepieces, a full-height tripod,…
Mars and Venus are our two neighboring planets in the Solar system. Thanks to this, they are the planets that…
In 2006, the International Astronomical Union assembled to discuss the discovery of Eris, an object slightly smaller than Pluto, and…
We have talked about the ways mankind will have to work around basic functions such as breathing on Mars when…
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