Observer’s Notebook: Astronomy
A star-filled sky is as mysterious as it is sublime. What are we looking at? How far away and from when?! How do I tell[…]
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Day: January 28, 2018
Budget 70-80mm Refractor Telescopes: How to Read the Specs Before You Buy
Online marketplaces are full of small refractor telescopes with 70 or 80 mm lenses, sold under many brand names. This site previously had separate short[…]
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Astronomy: A Self-Teaching Guide, Eighth Edition (Wiley Self Teaching Guides)
For a generation, Astronomy: A Self-Teaching Guide has introduced hundreds of thousands of readers worldwide to the night sky. Now this classic beginner’s guide has[…]
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