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!
Venus Facts: Explore the Brightest “Star” in The Sky
In February 2025, Venus is shining at its brightest in the evening sky! Get to know the planet and learn about upcoming Venus events in this article.
7 Planets Align on February 28, 2025: How to See the “Great Planet Parade”
The Great Planetary Alignment is coming! 7 planets will be visible around February 28. It won’t happen again this decade, so don't miss it! Find out how to see the planets lining up in the sky.
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.
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.
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 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!
Venus Quiz: Learn Fun Facts about the Earth's Hot, Toxic Twin Planet
Is it true that a day on Venus lasts longer than a year? Why is Venus the brightest and hottest planet in the Solar System? Learn interesting facts about our close neighbour!
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.
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!