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!
Daytime Astronomy: Can You See Stars During the Day?
Astronomy isn’t just for “night owls”! Explore the Sun, Moon, planets, bright stars, satellites, rare meteors, and atmospheric effects in our daytime astronomy guide, with tips for safe viewing.
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!
What Planets Are Visible Today? October 19–25, 2026 Sky Guide
Learn which planets are visible tonight, where to look, and when to see Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. Updated for October 19–25, 2026.
Bright “Star” Next to Moon: What Is Next to 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!
When & Where is Venus Visible in 2026? Observe the Brightest Planet
See when Venus is visible in 2026, how to find it in the sky, and why it shines so brightly. Learn key facts and upcoming events featuring Venus.
Planetary Oppositions 2026: Next Up Is Uranus
The best time to view most planets is at opposition. Find out what it means and when to see the upcoming oppositions.
All About Mars: Facts, Visibility, and Viewing Tips
Why does Mars look red? How big is it? Can you see it tonight? Discover Mars facts, get visibility tips, and learn about upcoming sky events.
Conjunction of Planets 2026: When to See Planets Close Together in the Sky
Looking for the next planetary conjunction? Here are the key dates in 2026 when planets will appear close together in the sky, plus visibility details and tips on what to watch for.
How to See Saturn Tonight? Complete Saturn Guide
Where is Saturn tonight? See when Saturn is visible, where to look in the sky, what it looks like to the naked eye, and how to find it from your location.
What Planet Is Retrograde Right Now (October 2026)? Retrograde Motion Explained
Learn what retrograde means, see which planets are retrograde right now, and get an easy way to observe retrograde loops.