Start here · Essential guide
How a Star Differs From a Planet
Learn how a star differs from a planet: how each makes or reflects light, size and mass, twinkling, motion, and simple ways to tell them apart in the night sky.
Stargazing & Observing
Stars & Sky
4 guides, starting with How a Star Differs From a Planet.
10 Facts About Shooting Stars You Can Spot Tonight
Ten facts about shooting stars: what they really are, how fast they travel, why they glow, which showers are best, and tips to spot more of them tonight.
How Long Do Stars Live? Star Lifespan Explained
How long do stars live? See how mass sets a star's lifespan, use a simple rule-of-thumb calculator, and learn how stars of different sizes end their lives.
Star Clusters List: Famous Open and Globular Clusters
A star clusters list of famous open and globular clusters, with constellations, catalog numbers, and tips on which ones to look for with eyes, binoculars, or a telescope.
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