Galaxy Chronicle

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

A supermoon is a full moon that lines up with the Moon's closest approach to Earth, making it look a little bigger and noticeably brighter than an ordinary full moon. At its best, a supermoon can appear up to 14% larger and about 30%...

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

A constellation is a group of stars that forms a recognizable pattern in the night sky, one we've given a name, usually after a mythological figure, animal, or object. There are 88 of them officially recognized, and together they map out the entire sky....
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The Planet Nobody Saw Until Someone Did the Math

On the night of September 23, 1846, a German astronomer named Johann Galle sat...

What Is the Asteroid Belt? The Solar System’s Rocky Middle Ground

Between Mars and Jupiter sits a doughnut-shaped region packed with leftover rubble from the...

Astronomers Just Found Three Supermassive Black Holes Sharing One Galaxy

Most large galaxies host exactly one supermassive black hole at their center. A galaxy...

Heads Up: A Solar Storm Is Hitting Earth Tomorrow, Aurora Possible

A coronal mass ejection launched from the Sun on August 14 is due to...

Some Black Holes Might Be Older Than the Big Bang Itself

For almost a century, cosmologists have traced everything back to one single starting point....

Jupiter: Size, Distance From the Sun, and Orbit

Jupiter took most of the leftover material from the Sun's own formation, ending up...

Webb Just Found Water Surviving Right Next to Our Galaxy’s Black Hole

Half a light-year from Sagittarius A*, in a region bathed in some of the...

Upcoming Meteor Showers: The Complete Rest-of-2026 Calendar

Six more meteor showers cross Earth's path before the year is out, and two...

Types of Galaxies: Spiral, Elliptical, and Irregular Explained

Every galaxy you've ever seen a photo of falls into one of a small...

What Is a Brown Dwarf? The Star That Never Quite Made It

Somewhere between a planet and a star sits a category of object that never...

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

For years, the James Webb Space Telescope has been spotting mysterious, extremely bright red...

How Will the Universe End? The Three Leading Theories

Every star will eventually burn out, every galaxy will drift apart, and given enough...

Latest articles

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

A supermoon is a full moon that lines up with the Moon's closest approach...

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

A constellation is a group of stars that forms a recognizable pattern in the...

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

There are eight planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn,...

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

A galaxy is an enormous collection of stars, gas, dust, and dark matter, all...