The Photo Nobody at NASA Wanted to Take

By February 1990, Voyager 1 had already done its job. It had flown past Jupiter and Saturn, sent back data nobody had ever seen,...

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...

O’Neill Colonies: The Ultimate Concept for Space Settlement

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

When Is the Next Solar Eclipse: Your Guide to the Ring of Fire and the Eclipse of the Century

The Short Answer The next solar eclipse is an annular "ring of fire" on February...

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...

The $10 Billion Telescope With 344 Ways to Die

On Christmas morning 2021, a rocket lifted off from French Guiana carrying humanity's most expensive scientific instrument ever built, and for the next two...

101 Must-See Cosmic Objects: The Dumbbell Nebula

Some deep sky objects take a serious telescope, a dark sky reservation, and a...

There’s a Recording of Someone Falling in Love, a Billion Miles From Earth

Attached to the side of both Voyager spacecraft, now drifting through interstellar space, sits...

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...

Cassiopeia Constellation: How to Find the Vain Queen’s W in the Night Sky

Some constellations take real effort to trace. You squint, connect faint dots, and hope...

What Is a White Dwarf? The Compact Corpse of a Dying Star

Most stars don't explode when they die. Instead, they shrink down into something small,...

149 Years Ago Today, a Foggy Washington Sky Nearly Cost Us a Discovery

On the night of August 17, 1877, at the U.S. Naval Observatory in Washington,...

Scientists Just Found the Same Swirl in Your Coffee Cup Happening All Over the Sun

Stir cream into coffee and watch the edges curl into tiny spirals. Wind blowing...

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

When you look up at the night sky Uranus is totally invisible to the...

Astronomers Discover the Nearest Black Hole to Earth

Black holes have a reputation for being distant, exotic objects, the kind of thing...

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 to See T Coronae Borealis: The Brightest Nova of the Generation

Every so often, the night sky offers up something that genuinely doesn't happen very...

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...

Planets

Orion Constellation: The Complete Guide to the Hunter’s Stars

No constellation is easier to find than Orion. Three stars in a near-perfect straight line, glowing steadily in the winter sky, have guided stargazers, sailors, and ancient mythmakers for thousands of years. Here's everything the Hunter's stars actually are, and exactly how to find...

Top 5 Space Discoveries of 2026 So Far You Can’t Miss

Last Tuesday, I sat on my back porch with a pair of binoculars, staring...

The Farm Boy Who Built a Telescope Out of a Buick and Found a Planet

A hailstorm wrecked the Tombaugh family's Kansas crops in the 1920s, wiping out any...

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...

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,...

Space Missions

How Vast Is the Universe? Discovering Exactly How Space Is Big

Try, just for a second, to actually picture the size of the universe. Most of us give up almost instantly, because honestly, our brains...

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...

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...

Venus: Size, Distance from the Sun, Orbit

When you look up at the evening sky right after sunset, you can often spot a brilliant point of light shining brighter than almost any star. That bright gem is Venus, our closest planetary neighbor. For centuries, people called it both the Evening Star...

What Is a Nebula? The Birthplace of Stars Explained

Have you ever looked up at the night sky and wondered where our sun came from? I often get lost in the beauty of...

Planet Earth

Mercury: A Complete Look at the Closest Planet to the Sun

Mercury doesn't get nearly as much attention as flashier neighbors like Mars or Saturn,...

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 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...

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...

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

Solar Eclipses Explained: What Are They, and How Often Does an Eclipse of the Sun Occur?

If you were anywhere in the path of totality back in April 2024, theres...

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,...

The Wonders of the Constellation Andromeda: Stars, Myths, and Galaxies

Fall evenings have a certain magic to them, the air gets crisp, the sky...

Have You Ever Wondered Why There Are No Green Stars?

Take a good look at the night sky sometime and you'll notice stars come...

Understanding Jupiter: Size, Orbit, and the Distance from the Sun to Jupiter

Look up on almost any clear night and theres a decent chance you'll spot...

The Mystery of the Ring Around the Moon: What Causes This Winter Phenomenon?

Step outside on a cold, clear night sometime this winter and look up. If...