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,...

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...

What Is the Temperature on Mars? The Highs, the Lows, and Why the Red Planet Is So Cold

The temperature on Mars averages about −60 °C (−80 °F), which makes it far...

How Many Moons Does Neptune Have: Meet Triton and the Ice Giant’s Strange Family

The Short Answer Neptune has 16 known moons. That's the current official count from NASA,...

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...

Astronomers Just Found Three Supermassive Black Holes Sharing One Galaxy

Most large galaxies host exactly one supermassive black hole at their center. A galaxy spotted by the James Webb Space Telescope just broke that...

The Photo That Needed an Earth-Sized Camera to Take

Nobody had ever seen a black hole. Not because telescopes weren't powerful enough in...

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

These two terms get mixed up constantly, and honestly, it's an easy mistake to...

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...

Why Does Saturn Have Rings But Earth Doesn’t Explained

Have you ever gazed at the night sky and wondered about the majestic beauty...

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...

Where Did the Term “Right Ascension” Originate, and Why Not Just Call It “Ascension”?

If you've ever tried picking up a telescope, downloading a stargazing app, or looking...

What Is a Blood Moon, and Why Should You Watch the Sky This August 27th?

Mark your calendar, because the night of August 27th into the early morning of...

Neptune: Just How Far Is the Distance From the Sun to Neptune?

Neptune sits so far out in the solar system that it took mathematics, not...

The Beauty of Great Comets: Images, Pictures, and Night Sky Wonders

Every once in a while, the night sky throws in something extra, a bright,...

How Do Astronauts Sleep in Space Explained Simply

Did you know astronauts see 16 sunrises and sunsets every day? This fast pace...

Planets Ranked by Size: All Eight Worlds From Biggest to Smallest

Here are the planets ranked by size, largest to smallest: Jupiter, Saturn, Uranus, Neptune,...

Sirius, the Dog Star: Everything About the Brightest Star in the Night Sky

On a crisp winter evening, step outside and look toward the south. If you...

Planets

Why Is Venus the Hottest Planet?

When most people guess which planet in our solar system is the absolute hottest, they almost always point to Mercury. It makes total sense on paper—Mercury is closest planet to the Sun, so shouldn't it be baking the most? Surprisingly though, that isn't how planetary...

China Just Landed a Reusable Rocket: Inside LandSpace’s Historic ZhuQue-3 Booster Touchdown

For years, the sight of a rocket booster falling back to Earth and landing...

Our Neighboring Galaxy Is Slowing Down, and Nobody’s Quite Sure Why

Andromeda has been humanity's most-watched galaxy for over a century, close enough to spot...

Astronomy 101: Exploring the Planets of the Solar System

Theres a reason almost every astronomy class, every science museum, and every kid's first...

How Many Earths Fit in Jupiter: Sizing Up the Solar System’s Biggest Planet

The Short Answer About 1,300 Earths could fit inside Jupiter. The king of the planets...

Space Missions

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 solar system's earliest days. It's the asteroid belt, and despite...

A Musician’s Hobby Doubled the Size of the Known Solar System Overnight

For nearly six thousand years of recorded human history, the solar system ended at...

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...

Webb’s New Portrait of the Lion Nebula Just Dropped, and It’s Roaring

Five thousand light-years away, a dying star is carving a lion's face out of glowing gas, and on August 10, NASA released the sharpest look at it yet. The James Webb Space Telescope just captured stunning new infrared images of NGC 2392, nicknamed the...

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 or take 20 million, measured from the faint afterglow of...

Planet Earth

A Complete Guide to the Ara Constellation: The Celestial Altar

If you've ever spent a summer night scanning the sky south of Scorpius, theres...

Planets Ranked by Size: All Eight Worlds From Biggest to Smallest

Here are the planets ranked by size, largest to smallest: Jupiter, Saturn, Uranus, Neptune,...

Neptune’s Tiny Moons Contain a Mineral That Shouldn’t Exist Out There, and It’s Rewriting Their History

Larissa and Galatea, two small, dark moons orbiting close to Neptune, sit in a...

What’s So Special About Our Moon? Discovering Its Impact and Diameter

Its easy to take the Moon for granted. It's up there almost every night,...

What Sort of Star Is the Sun? Facts, Size, and Fate of Our Blazing Star

Weve all grown up staring at it, feeling its heat, and building our entire calendar around its rise and fall, but ask most people what sort of star is the sun, and you'll probably get a shrug. Its just "the Sun," the one constant...

All Articles

What’s So Special About Our Moon? Discovering Its Impact and Diameter

Its easy to take the Moon for granted. It's up there almost every night,...

Astronomy 101 : A Beginner’s Guide to the Planets in Our Solar System

Getting into astronomy can feel a little overwhelming at first, theres just so much...

What is Jupiter’s Distance from the Sun? Facts and Figures

Theres something almost hard to wrap your head around when you start comparing distances...

The Closest Star Systems to Earth: A Complete Guide

Stare up at a dark, clear sky long enough and its easy to start...

What is the Distance from the Jupiter to the Sun? (Facts & Figures)

Ask most people to name the planets in order and they'll usually get through...

What Is the Milky Way Galaxy? Everything You Need to Know

Have you ever looked up at a clear night sky and wondered about our...