Buying Guides
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Best Telescopes Under $200
Where budget scopes start showing planets and bright galaxies well.
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Best Star Diagonals
Mirror or prism, 1.25 or 2 inch: the right diagonal for your scope.
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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.
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
“Types of moons” is one of those searches that means three completely different things depending on who’s typing it. Some…
About a third of the planets we’ve found orbiting other stars don’t exist in our solar system at all. They’re…
Most lists of Colorado observatories just dump seven research facilities into a table and call it a day. Useful if…
NASA usually doesn’t fly a brand-new technology on a billion-dollar flagship without testing it first. The New Millennium Program existed…
Nebraska has seven working planetariums, and most of the lists online can’t agree on which ones they are. Some count…
Kentucky doesn’t get the dark-sky press that Utah or West Texas does, but it has a surprisingly deep bench of…
Mercury is the closest planet to the Sun, and it should be easy to visit. It isn’t. In more than…
Sending a spacecraft to the Sun sounds like a contradiction. You point a multi-billion-dollar machine straight at the one object…
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