Buying Guides
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Best Telescopes for Kids 5 and Under
Whether a young child is ready for a telescope, and which ones to try.
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Space Coffee Table Books
Six big, beautiful space books to leave out for guests.
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Best Telescopes for 10-Year-Olds
Easy, sturdy scopes for kids ten to fourteen who are ready for the real thing.
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
32 astrophysics books for non-scientists, sorted by what you are curious about, with a math label on every pick, a 3-step reading ladder and audiobook notes.
27 astronomy books for self study sorted into six stages, from no-math popular science to university astrophysics, with the math each book expects and free courses to pair with them.
Stars form when a cold cloud of gas and dust collapses under its own weight. Dense knots heat up, ignite,…
Table of Contents Quick answer The closest NASA mission to the Sun is Parker Solar Probe. It crossed into the…
The Mayan zodiac isn’t a wheel of twelve months. It’s the Tzolk’in, a 260-day calendar where your sign is set…
Arizona has some of the darkest skies in the lower 48, and almost nobody builds a planetarium trip around that.…
All 88 constellations with a star chart drawn from real star positions, the meaning of each name, pronunciation, best month to see it and free printable PDFs.
Find every Great Red Spot transit in your local time, see which ones are observable from your location and where the spot is on Jupiter right now.
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