How Hot Is the Sun? A Layer-by-Layer Look at Our Star’s Blistering Temperatures

How hot is the sun? It depends entirely on which part you mean. The core is a nuclear furnace running at around 15 million...

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....

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...

Astronomers Discover Earth’s Nearest Black Hole

For most of human history, black holes felt like something that only existed in...

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...

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

The Sun sits an average of about 93 million miles (150 million kilometers) from...

How Old Is the Universe? The 13.8-Billion-Year Answer and How We Measured It

The universe is about 13.8 billion years old. More precisely, 13.787 billion years, give...

What Is a Magnetar? The Strongest Magnets in the Universe

Somewhere out there sits a stellar remnant so magnetically powerful it could, in theory, wipe every credit card on Earth from over halfway to...

This Asteroid Has Been Watched for 169 Years, and It Just Turned Out to Be Three Rocks Wearing a Trench Coat

Asteroid 44 Nysa has been sitting in astronomers' sights since 1857, bright, big, and...

O’Neill Colonies: The Ultimate Concept for Space Settlement

Every so often a space idea comes along that sounds like pure science fiction...

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

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...

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

The Sun sits an average of about 93 million miles (150 million kilometers) from...

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

Science fiction loves wormholes, tunnels through space and time that let a ship skip...

Does Venus Have Moons: Why Earth’s Twin Is a World Without a Single Moon

The Short Answer No, Venus has no moons at all. Zero. Along with Mercury, it's...

A Physicist Spent 10 Years Measuring Gravity Without Being Allowed to Know His Own Results

Stephan Schlamminger stood on a conference stage in July 2024, holding a sealed envelope...

Sirius, the Dog Star: The Brightest Light in Our Night Sky and the Tiny Ghost Beside It

On a clear winter night, step outside and look toward the south. There is...

Can Humans Live on Mars? Facts and Future Insights

Carl Sagan once said, "Somewhere, something incredible is waiting to be known." This quote...

When Will the Earth End: The Science Behind Our Planet’s Distant Future

The Short Answer The Earth isn't ending any time soon. There's no scientifically predicted doomsday...

What Happens When a Star Dies?

Stars look like they are permanent. They sit in the night sky year after...

She Measured the Universe. Nobody Let Her Touch a Telescope.

Henrietta Leavitt spent her career at Harvard doing work considered too tedious for the...

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

Science fiction loves wormholes, tunnels through space and time that let a ship skip...

Planets

The Geminids Meteor Shower: How to Catch the Best Shooting Stars of the Year in 2026

If you only make time for one meteor shower all year, make it this one. While everybody talks about the summer Perseids, the real showstopper arrives in the cold heart of December. The Geminids are the strongest, most reliable meteor shower we get, throwing...

What Is the Solar System? A Complete Guide for Beginners

Ever wonder how our vast cosmic neighborhood came to be? Many people gaze at...

The Orion Nebula (M42): A Stellar Nursery You Can See With Your Own Eyes

Most of the jaw-dropping objects in deep space are hopelessly out of reach. You...

The Total Solar Eclipse of August 12: Who Will See It and How?

On August 12, 2026, the Moon will pass directly between Earth and the Sun,...

How Fast is the Speed of Light?

Ever looked up at the stars at night and wondered how fast that light...

Space Missions

A Half-Built Telescope Was Just Being Tested. It Found Something Nobody Had Ever Seen.

In November 2025, a team in Chile pointed a telescope that wasn't even finished yet at a nebula that's been photographed more times than...

What the Apollo Moon Rocks Actually Told Us

One of the very first things Neil Armstrong did after climbing down the ladder...

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

The Sun sits an average of about 93 million miles (150 million kilometers) from...

Why Do Stars Twinkle? The Simple Science Behind the Sky’s Sparkle

Here's the twist that surprises almost everyone: stars don't actually twinkle. Not really. The flickering you see on a clear night has almost nothing to do with the star itself. It happens down here, in the few miles of restless air between you and...

How will life on Earth end?

Have you ever laid back on a warm summer night, looked up at the endless stars, and wondered when will the earth end? Its...

Planet Earth

Asteroid 2029 Apophis: Will It Hit Earth on Friday the 13th?

Short answer first, because it's the question everyone actually wants settled: no. Asteroid 2029...

Our Galaxy’s Oldest Known Secret Just Got Uncovered, and It’s Named After Hercules

"Our home is the Milky Way galaxy, but we do not know how our...

The Taurus Constellation: How to Find the Bull, Its Red Eye, and Two Dazzling Star Clusters

Some constellations make you work to see the picture. Taurus practically hands it to...

August 12, 2026: The Day the Sky Puts on Three Shows at Once

Most years, skywatchers have to pick their moments. You wait for a meteor shower,...

How to See the Northern Lights: Your Complete Guide to Catching the Aurora in 2026

Seeing the northern lights in person is one of those experiences that reorganizes your sense of what the sky can do. Photos are beautiful, but they don't prepare you for the moment curtains of green and pink actually start rippling and dancing overhead, silent...

All Articles

What Is a Nebula? The Cosmic Clouds That Build and Bury Stars

Some of the most breathtaking photos in all of astronomy, the ones that end...

Voyager 1: The Farthest Human-Made Object Is About to Hit a Mind-Blowing Milestone

Somewhere out past the edge of our solar system, moving farther away with every...

What Are Saturn’s Rings Made Of? The Icy Truth Behind the Solar System’s Most Famous Feature

Ask a kid to draw a picture of a planet and theres a solid...

Perseid Meteor Shower 2026: Your Complete Guide to This Year’s Best Show

If you've been waiting for the right year to finally see the Perseids at...

What Is Uranus’s Distance from the Sun? The Complete Guide to the Ice Giant’s Orbit

Of all the planets in our solar system, Uranus tends to get the least...

How Old is the Oldest Thing on the Planet from Our Solar System?

Ever look up at the night sky and wonder what's actually the oldest thing...