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!
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!
Explore the Red Planet: All the Must-Know Facts About Mars
Why is Mars red? What’s the gravity on Mars? Read this article to get answers to these and many other questions and learn more about the Red Planet.
Planetary Opposition 2025: Best Time to See Planets
The best time to view most planets is at the astronomical opposition. Find out what it means and when to see the upcoming oppositions.
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.
Planet Saturn: How to Find Saturn in the Sky in 2025?
How many rings does Saturn have? Where is Saturn tonight in the sky? Find answers to these and other most common questions about Saturn in our article.
A Rare Sky Show in Leo: See Moon, Venus, and Regulus Close Together on September 19
Three bright objects meet in the dawn sky – and one vanishes. A rare celestial event unfolds on September 19, 2025.
Calendar of All Astronomical Events 2025
Ready to spend 2025 staring at the sky instead of your phone? We've got all the astronomical events of the year in one place. Check out the dates and times for conjunctions, meteor showers, eclipses, supermoons, equinoxes, solstices, and more.
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!
Retrograde motion explained: what is retrograde motion in astronomy
Discover the science of retrograde planets! Understand the mechanics of retrograde motion, its causes, and its significance in the study of astronomy and planetary behavior.
All About Mercury, The Smallest Planet In The Solar System
Explore the closest planet to the Sun! Find out how long a day on Mercury is and how many moons the planet has. Also, keep up with the upcoming Mercury events!