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 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.
Planet Uranus: The Coldest Planet
What is Uranus? Learn facts about its size, rings, moons, rotation, and cold atmosphere. Also, explore Uranus’ upcoming events!
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!
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!
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.
Glowing Venus and Elusive Mercury Before Dawn – How to See Them on November 25
On November 25, 2025, Mercury and Venus will be about 2° apart in the pre-dawn sky. Find out when and where to look, how bright they will get, and what you need for observation.
Planetary Oppositions 2025-2026: Next Up Is Jupiter!
The best time to view most planets is at the astronomical opposition. Find out what it means and when to see the upcoming oppositions.
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!
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.
Astronomical Conjunction of Planets 2025: When to See 2 Planets Close Together?
See two planets side by side! Discover rare planetary events in 2025, including the elusive Mercury-Venus conjunction. Get dates, times, and viewing tips now!