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!
Moon aligns with Jupiter, and the “Twin” Stars on November 9–10, 2025
Nov 9–10, 2025: The Moon aligns with Jupiter, Castor, and Pollux in Gemini — visible even under city lights. Find the best viewing times, directions, and photo tips here!
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.
Planetary Opposition 2025: Next Up Is Uranus!
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.
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!
Moon, Saturn, and Neptune Form a Triangle on November 1 and 2
On November 1 and 2, watch the Moon pass near Saturn and Neptune — a beautiful trio glowing in the evening sky! Read the article to learn how to see it.
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-Mars conjunction. Get dates, times, and viewing tips now!