Buying Guides
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Best Eyepieces for Each Planet
The focal length to use for Mercury through Neptune, planet by planet.
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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 Telescopes Under $100
The cheap scopes that are worth buying, and the ones to skip.
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
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…
Table of Contents TLDR Seven astronauts carry a real Connecticut connection: Jack Hathaway (South Windsor, currently aboard the ISS on…
Mars, Jupiter, and Titan get most of the attention, and they’ve earned it. But the solar system has more than…
Roughly fifty spacecraft have aimed themselves at Mars since 1960. About half of them made it. That failure rate alone…
TLDR Five NASA missions have laid eyes on Ganymede so far — Pioneer 10 and 11 (1973-74), Voyager 1 and…
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