How Big Is the Universe? Facts About Its Incredible Size

Did you know that light travels at 186,000 miles per second, yet it would take billions of years to cross our known reality? Scientists...

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...

The Artemis 2 Trajectory Explained: Inside NASA’s Historic Moon Mission

For the first time in over fifty years, human beings left low Earth orbit...

The Planet Nobody Saw Until Someone Did the Math

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

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...

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

Six more meteor showers cross Earth's path before the year is out, and two of them rank among the best of the entire year....

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 Long Is a Year on Saturn? The Ringed Planet’s Orbit Explained

Have you ever wondered what your birthday would look like if you lived on...

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 Do Stars Twinkle: The Simple Reason Behind the Night Sky’s Shimmer

The Short Answer Stars twinkle because of the Earth's atmosphere, not because of anything the...

NASA Destroyed a Perfectly Working Spacecraft on Purpose. Here’s Why That Was the Right Call.

On September 15, 2017, mission controllers at NASA's Jet Propulsion Laboratory watched a signal...

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 Would Happen if the Earth Stopped Spinning?

Right now, as you sit comfortably on your couch reading this on your phone...

What Is Dark Energy? The Mysterious Force Pulling the Universe Apart

In just two weeks, NASA is launching a telescope specifically built to chase down...

A Magnetar Just Gave Scientists the Best Evidence Yet That Empty Space Isn’t Really Empty

A quantum physics prediction sitting untested for 90 years may have finally found its...

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 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 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...

Planets

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 °C (27 million °F), while the visible surface we actually see is a comparatively "mild" 5,500 °C (10,000 °F). Then,...

What Is Dark Energy? The Mysterious Force Pulling the Universe Apart

In just two weeks, NASA is launching a telescope specifically built to chase down...

Is Pluto a Planet: The Real Story Behind the Solar System’s Most Famous Demotion

The Short Answer No, Pluto is no longer classified as a planet. In 2006 the...

Why Does Saturn Have Rings But Earth Doesn’t Explained

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

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...

Space Missions

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 August 28th is bringing one of the most striking sky...

What Is the Big Bang? The Moment Everything Started

Everything that exists, every galaxy, star, planet, and atom in your own body, traces...

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 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 is so vast that you could pour more than a thousand Earths into it and still have room to spare. It's a number that really drives home just how much...

Europe Just Saw Its First Total Solar Eclipse Since 1999

On Wednesday, August 12, the Moon's shadow swept across Greenland, Iceland, and northern Spain, giving mainland Europe its first total solar eclipse in 27...

Planet Earth

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...

Is Pluto a Planet: The Real Story Behind the Solar System’s Most Famous Demotion

The Short Answer No, Pluto is no longer classified as a planet. In 2006 the...

What Is a White Hole: The Bizarre Mirror Image of a Black Hole

The Short Answer A white hole is the theoretical opposite of a black hole. Where...

What Is a Waxing Moon?

If you've ever looked up at the Moon and noticed that it seems to...

Why Do Some Planets Have More Moons Than Others?

Meta Information SEO Title: Why Do Some Planets Have More Moons Than Others? Exploring Planetary Satellites Meta Title: Why Do Some Planets Have More Moons Than Others? Meta Description: Discover why giant planets have dozens of moons while others have only a few. Learn how gravity, planetary...

All Articles

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...

Can Humans Live on Mars? Facts and Future Insights

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

What Is Dark Energy? A Friendly Guide to Cosmic Mystery

Did you know that everything we can see in the entire cosmos makes up...

What Is Dark Matter? A Friendly Guide to the Mystery

Ever thought about the space between stars? Is it really empty, or is something...

What Happens to the Human Body After a Year in Space?

"Exploration is in our nature," said Neil Armstrong. This urge drives us to explore...

What Is the Solar System? A Complete Guide for Beginners

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