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Galaxy Chronicle

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Planet Earth

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%...
Astronomy for Beginners

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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Astronomy for Beginners

The 8 Phases of the Moon Explained: A Simple Guide to Every Shape in the Lunar Cycle

Look up at the Moon a few nights in a row and something quietly...
Galaxies & Deep Space

What Is a Light-Year? The Cosmic Measuring Stick Everyone Gets Wrong

Here's a small confession that a lot of people are too embarrassed to make...
Planets & Solar System

Mars Gravity Compared to Earth: What You’d Really Weigh on the Red Planet

Picture yourself stepping off a lander onto the rusty dust of Mars. First thing...
Space Missions & Discoveries

The Mars Rover’s Last Words: The True Story Behind “My Battery Is Low and It’s Getting Dark”

There's a line about a dying robot on Mars that has made grown people...
Astronomy for Beginners

The 8 Phases of the Moon Explained: A Simple Guide to Waxing, Waning, and Everything in Between

Almost everyone has looked up at some point and wondered why the Moon keeps...
Galaxies & Deep Space

How Do Black Holes Form: The Violent Death That Gives Birth to the Universe’s Darkest Objects

There's a star in the Andromeda galaxy that simply vanished. Astronomers had been watching...
Astronomy for Beginners

The Taurus Constellation: How to Find the Bull, the Fiery Star Aldebaran, and Two Famous Star Clusters

Some constellations are quiet and subtle. Taurus is not one of them. This is...
Astronomy for Beginners

The 12 Zodiac Constellations: The Real Astronomy Behind the Star Signs

Everyone knows their star sign. It's on birthday cards, dating profiles, and the back...
Astronomy for Beginners

The Leo Constellation: How to Spot the Lion of the Spring Sky and Its Bright Star Regulus

Most constellations take a generous imagination to see. Someone tells you a random scattering...
Astronomy for Beginners

The Big Dipper: How to Find Ursa Major’s Famous Seven Stars and Use Them to Read the Whole Sky

Ask almost anyone to point out a star pattern, and there's a good chance...
Planet Earth

Aurora Australis: The Southern Lights, Nature’s Glowing Show at the Bottom of the World

Almost everyone has seen photos of the Northern Lights, those rippling green curtains that...
Astronomy for Beginners

The Little Dipper: How to Find Ursa Minor and the North Star That Sits at Its Tip

Almost everyone has heard of the Little Dipper, and almost everyone assumes it's easy...
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Planet Earth

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...
Astronomy for Beginners

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...
Planets & Solar System

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,...
Galaxies & Deep Space

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...