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!
Planetary Conjunctions 2025: What Are These Two Bright “Stars” in the Sky?
See two planets side by side! Learn about the upcoming events in 2025, get observing tips and fascinating insights into planetary conjunctions.
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!
Venus Shines At Its Brightest: How To See It
See the dazzling planet Venus at its peak brightness in April 2025! Learn here how, where, and when to observe the brilliant “morning star”.
4 Planets Align on April 17, 2025: Southern Planet Parade
Southern Hemisphere, get ready! In April, 4 planets will align in the morning sky, clearly visible in your sky. Northern Hemisphere, you’ll get a chance too! Find out how to see the planets lining up in the sky.
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.
Fun 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!
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.
Venus Facts: Explore the Brightest “Star” in The Sky
In April 2025, Venus will be shining at its brightest in the morning sky! Get to know the planet and learn about upcoming Venus events in this article.
Planet Uranus: The Coldest Planet
Uranus has a peculiar chemical composition, extreme temperatures, and the most unusual axial tilt. Here we’ll take a closer look at this planet.