Planets & Moons
There are 8 officially recognized Solar System planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Most of them, except Mercury and Venus, have their own natural satellites, commonly called “moons.” Some of the dwarf planets, like Pluto and Eris, have moons, too. Here, you’ll learn the best dates to observe planets in the sky and find everything you need to know about planets, dwarf planets, and natural satellites. When you learn enough, test your astronomy skills with our challenging quizzes!
Conjunction of Planets 2026: When to See Two Planets Next to Each Other?
See two planets side by side! Discover rare planetary events in 2026. Get dates, times, and viewing tips now!
Neptune: The Farthest & Windiest Planet in the Solar System
How big is Neptune? What is Neptune made of? Why is Neptune blue? Read our article and learn curious facts about the outermost planet in the Solar System.
Facts About Jupiter: The Biggest Planet in the Solar System
Bright Jupiter is known for its enormous size, many moons, and mysterious Great Red Spot. Read our article to uncover all the secrets of the giant planet.
Bright “Star” Next to Moon: What Planet Is Near the Moon Tonight?
What is that bright dot shining near the Moon tonight? Find out about stars and planets that can be seen next to our natural satellite this month!
Venus Facts: Explore the Brightest Planet in The Sky
Meet Venus, the Earth’s “evil sister!” Get to know the planet and learn about upcoming Venus events in this article.
Rare Planetary Alignment on February 28, 2026: How to See Six Planets After Sunset
Don’t miss the 6-planet alignment on February 28, 2026 — four of the six planets will be visible to the naked eye! Learn how to see this rare event.
Galilean Moons: A Complete Guide to the Four Largest Moons of Jupiter
What’s the story behind discovering Jupiter’s moons? You won’t make the same mistake Galileo did while observing them if you read this article. 🔭
What Is Retrograde Motion in Astronomy? Next Up – Mercury Retrograde 2026
Mercury retrograde in February is coming! Before blaming your problems on it, get the science. Learn what retrograde means in astronomy and check the next planetary retrograde dates.
Planet Uranus: The Coldest Planet
What is Uranus? Learn facts about its size, rings, moons, rotation, and cold atmosphere. Also, explore Uranus’ upcoming events!
All About Pluto: Explore The Peculiar Dwarf Planet
How far is Pluto from the Earth? Why isn’t Pluto a planet? Read this article to get answers to these and many other questions!