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Galaxy Chronicle

Astronomers Just Found a “Black Hole Star,” a Cosmic Object That Shouldn’t Exist

Galaxies & Deep Space

How Will the Universe End? The Three Leading Theories

Galaxies & Deep Space

How Many Galaxies Are in the Observable Universe?

Astronomy for Beginners

What’s the Difference Between a Galaxy and a Solar System?

Planets & Solar System

How Many Moons Does Jupiter Have? The 2026 Count

A Magnetar Just Gave Scientists the Best Evidence Yet That Empty Space Isn’t Really Empty

Planets & Solar System

What Is the Oort Cloud? The Solar System’s Icy, Invisible Edge

Astronomy for Beginners

What Causes the Aurora Borealis? The Science Behind the Northern Lights

Galaxies & Deep Space

What Is a Wormhole? Cosmic Shortcuts That Might Not Actually Exist

Planets & Solar System

Saturn: Size, Distance From the Sun, and Its Slow, Tilted Orbit

Planets & Solar System

Mars: Size, Distance From the Sun, and Orbit

Galaxies & Deep Space

What Is the Fermi Paradox? Where Is Everybody?

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Recent Stories

Supermoon: What It Really Is, Why It Happens, and When to Catch the Next One

What Is a Constellation? A Beginner’s Guide to the Sky’s 88 Star Patterns

How Many Planets Are There? The Real Answer Is Bigger Than Eight

What Is a Galaxy? A Simple Guide to the Great Islands of Stars

How Far Is the Sun From Earth? The 93-Million-Mile Answer and Why It Keeps Changing