Wonderopolis

Why Are All Planets Spheres?

We think you’ll want to hang aROUND to check out today’s Wonder of the Day!

#1992

Why Are All Planets Spheres?
How Many Moons Does Saturn Have?

Today’s Wonder of the Day has a familiar ring to it!

#1979

How Many Moons Does Saturn Have?
What is the eXtreme Deep Field?

Today’s Wonder of the Day will take you back to the beginning of the universe!

#1976

What is the eXtreme Deep Field?
What’s the Difference Between a Solar and a Lunar Eclipse?

There’s more to today’s Wonder of the Day than meets the eye!

#1658

What’s the Difference Between a Solar and a Lunar Eclipse?
How Many Stars Are In the Universe?

You can count some things on your fingers and toes, but there aren’t enough fingers and toes on Earth to count what we’re counting in Wonderopolis today!

#182

How Many Stars Are In the Universe?
Where Is the Oort Cloud?

We believe you’ll think today’s Wonder of the Day is out of this world!

#1830

Where Is the Oort Cloud?
What Is a Watershed?

Today’s Wonder of the Day will really help you go with the flow!

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What Is a Watershed?
What Is an Exoplanet?

Today’s Wonder of the Day will take you to the farthest reaches of the universe!

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What Is an Exoplanet?
What Is Dark Matter?

Today’s Wonder of the Day will shine light on some interesting subject matter!

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What Is Dark Matter?
What Is the Weather Like on Other Planets?

Today’s Wonder of the Day features some bad weather that’s out of this world!

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What Is the Weather Like on Other Planets?
Where Is the Milky Way?

Today’s out-of-this-world Wonder of the Day may make you hungry for a candy bar!

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Where Is the Milky Way?
Is Earth Called the Same Thing in Every Language?

Today’s Wonder of the Day takes a look at something we all have in common!

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Is Earth Called the Same Thing in Every Language?
What Is the Coldest Planet?

Today’s Wonder of the Day will take you to one of the coolest places ever!

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What Is the Coldest Planet?
Where Is the Quietest Town in America?

In today’s Wonder of the Day, you could hear a pin drop!

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Where Is the Quietest Town in America?
What Are Saturn’s Rings Made of?

Join us in Wonderopolis today for a look at some rings more famous than diamonds!

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What Are Saturn’s Rings Made of?
Is There a Planet Between Mars and Jupiter?

Today’s Wonder of the Day isn’t about Snow White, but it does feature some dwarves!

#1458

Is There a Planet Between Mars and Jupiter?
Why Is Pluto No Longer a Planet?

Poor Pluto! Put on your space suit and join us as we examine the sad tale of this once proud and now demoted dwarf planet.

#73

Why Is Pluto No Longer a Planet?
What Is Mercury?

Today’s Wonder of the Day is a bit mercurial!

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What Is Mercury?
What's the Biggest Thing You Can See?

Today’s Wonder of the Day is huge. We’re not kidding. It’s so big you’ll have to see it to believe it!

#364

What's the Biggest Thing You Can See?