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 Alignment in space

Planetary Alignment on January 21, 2025: How to See It

~13 min
Astronomical News

The next planetary alignments are on January 21 and February 28. Don't miss them, they're going to be spectacular! Find out how to see planets line up in the sky.

Planets near the Moon

Planet Next to the Moon Tonight: January 2025

~6 min
Astronomical News

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!

Planetary Opposition

Planetary Opposition 2025: Best Time to See Planets

~8 min
Astronomical News

The best time to view most planets is at the astronomical opposition. Find out what it means and when to see the upcoming oppositions.

Planetary conjunctions - bright dots

Planetary Conjunctions 2025: Next Stop – Venus & Saturn

~5 min
Astronomical News

Next up: Venus passes Saturn from January 18 to 20!🪐 Learn the exact timing, get observing tips, and fascinating insights into planetary conjunctions.

Don’t Miss Mars at Its Brightest on January 16, 2025!

~12 min
Astronomical News

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.

Facts About Saturn

What Is Saturn And When Will It Shine Brightest In 2025?

~13 min
Astronomical News

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.

Mars opposition 2025

Mars Opposition 2025: Best Time to See Mars Until 2031

~4 min
Astronomical News

Mars will be directly opposite the Sun on January 16, 2025. Learn why you absolutely must see this celestial event.

Jupiter guide

Fun Facts About Jupiter: The Biggest Planet in the Solar System

~11 min
Astronomical News

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.

Facts About Mercury

All About Mercury, The Smallest Planet In The Solar System

~9 min
Astronomical News

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!

Planetary Alignment Infographic Preview

Planetary Alignment Infographic: A Celestial Parade

Infographics

Discover how to observe planetary alignments with this colorful infographic and mark your calendar for the next “planet parade”.