Buying Guides
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Best Reflector Telescopes for Beginners
The most aperture for your money, chosen for a first telescope.
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Best Binoviewers
Look through your telescope with both eyes for sharper, more relaxed views.
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Best Telescope Covers
Keep dust, dew and sun off your scope between observing sessions.
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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Table of Contents TLDR There are 88 modern constellations, officially fixed by the International Astronomical Union in 1922 and given…
Table of Contents In June 2026, Anil Menon will strap into a Soyuz seat and head for the International Space…
TLDR Six missions have gotten close to Ganymede, and one is on its way to actually orbit it: No spacecraft…
Table of Contents TLDR: The Quick Picks Connecticut has eight real options for a dome show or a night behind…
Most “beautiful star names” lists give you a wall of forty names dumped into “boy” and “girl” buckets with a…
The Local Group is the patch of universe we happen to live in: a gravitationally bound cluster of galaxies roughly…
Table of Contents How Many Types of Nebulae Are There? Five, if you’re being precise about it: emission, reflection, dark,…
TLDR NASA’s active astronaut corps hovers around 40 people at any given time, drawn from a pool that’s grown to…
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