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Pluto is now categorized as a dwarf planet.
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The Hubble Space Telescope is a large space telescope orbiting Earth.
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An orbit is a regular, repeating path that one object in space takes around another one.
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Antarctica is a continent. Antarctica covers Earth's South Pole.
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A satellite is anything that orbits a planet or a star.
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Learn all about comets!
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What Is the James Webb Space Telescope?
The James Webb Space Telescope is the largest, most powerful space telescope ever built.
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The light of daytime comes from our closest star: the Sun. Learn more about it!
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The light of daytime comes from our closest star: the Sun. Learn more about it!
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Why Do We Care About Water on Mars?
Where there are signs of water, there might also be signs of life!
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Learn more about what these groups of stars can (and can’t) tell us about our place in the universe.
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Check out these nine unearthly nightmares that could be happening right now in our own galaxy. Eek!
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Learn about the Moon's phases!
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Airplanes and satellites can experience changes in time! Read on to find out more.
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Learn about impact craters!
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How Long is a Year on Other Planets?
You probably know that a year is 365 days here on Earth. But did you know that on Mercury you’d have a birthday every 88 days? Read this article to find out how long it takes all the planets in our solar system to make a trip around the Sun.
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Approximately every four years we add a day to the calendar. Learn more about why it’s important!
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It all depends on what the spacecraft will do! Read on to learn more.
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The biggest planet in our solar system
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What Is the Weather Like on Other Planets?
Each of the planets in our solar system experiences its own unique weather.
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Is There Ice on Other Planets?
Yes, there is ice beyond Earth! In fact, ice can be found on several planets and moons in our solar system.
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Supermoon, Blood Moon, Blue Moon and Harvest Moon
Learn about the different names we have for a full moon!
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A light-year is the distance light travels in one Earth year. Learn about how we use light-years to measure the distance of objects in space.
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Learn more about tremors on Earth—and other planets too!
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We can use a planet’s gravitational pull like a scale!
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Learn about what makes our Sun a very busy place!
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How Many Solar Systems Are in Our Galaxy?
Astronomers have discovered 2,500 so far, but there are likely to be many more!
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Learn more about these exploding stars!
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Learn more about what happens when the moon passes between Earth and the sun!
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How Is the Sun Completely Blocked in an Eclipse?
It all has to do with the distance between Earth and the sun and Earth and the moon.
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How do gravitational waves give us a new way to learn about the universe?
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What is an exoplanet? And how do we know they're out there?
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Searching for Other Planets Like Ours
Exoplanets are far away and hard to see. How do we look for them?
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Asteroid or Meteor: What's the Difference?
Learn more about asteroids, meteors, meteoroids, meteorites, and comets!
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And what can we learn from these space rocks in our solar system?
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Learn more about this weather pattern!
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Learn more about Earth's water in this video!
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This future mission will try to find out if life ever existed on the Red Planet!
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Mars had water long ago. But did it also have other conditions needed for life?
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The Mars Rovers: Spirit and Opportunity
What did these twin rovers teach us about the history of water on Mars?
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Learn more about the first rover to land on Mars!
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How do rovers help us learn more about the Red Planet?
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Explore the different types of galaxies!
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How Does Our Sun Compare With Other Stars?
The Sun is actually a pretty average star!
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The icy bits past Neptune’s orbit
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Where Does the Solar System End?
The Oort Cloud!
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The outermost layer
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The heat that won’t keep you warm
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The active, changing layer
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The middle layer
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The layer made of layers
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The layer we call home
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A jacket for the planet
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And how round are they?
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What causes this beautiful light show?
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and dark energy, too!
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Sunburns are no fun.
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Lunar Eclipses and Solar Eclipses
What’s the difference?
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How many are there?
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The coldest planet in our solar system
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The planet that spins on its side
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The planet with beautiful rings
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The biggest planet in our solar system
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The red planet
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The planet with living things
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The hottest planet in our solar system
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Learn more about the planets in our solar system
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The smallest planet in our solar system
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Find definitions of space and Earth science terms
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How Long Is One Day on Other Planets?
Learn to make a graph with the answer!
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Why do we call it that?
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It’s farther away than you might realize.
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And how long will it shine?
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How Many Moons Does Each Planet Have?
We have one, but some planets have dozens.
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Where Do Old Satellites Go When They Die?
They don't last forever. So do they all become 'space junk'?
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Learn more about this icy moon of Jupiter!
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Where Does Interstellar Space Begin?
Interstellar space begins where the sun’s magnetic field stops affecting its surroundings.
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Jumping the Tallest Cliff in the Solar System
How far would we have to travel to get there?
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What are they and what will become of them?
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Where Does the Sun's Energy Come From?
Space Place in a Snap answers this important question!
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What's It Like Inside Jupiter?
Jupiter's core is very hot and is under tons of pressure!
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Why Does the Moon Have Craters?
It's not because the Moon gets hit by meteors more often...
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We all use it, but how does it work, anyway?
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Space Place in a Snap explains how your phone knows where to look for pizza.
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Space Place in a Snap tackles this fascinating question!
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Astronomers may have found a planet without a sun!
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The answer isn't so simple...
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How Did the Solar System Form?
The story starts about 4.6 billion years ago, with a cloud of stellar dust.
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And what causes them to form?
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Explore the many volcanoes in our solar system using the Space Volcano Explorer.
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How can NASA help us learn about bird migration?
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The key is curiosity!
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The Sun’s activity follows an 11-year cycle. Learn more about it!
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Bad (space) weather cancels pigeon races!
Why do pigeons care about what the Sun is doing?
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The answer may surprise you.
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Could they have brought the water to our planet?
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What causes them?
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What causes them?
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Gallery of NASA Technology Images
Astronauts, rockets, and spacecraft to view or print.
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Get up close and personal with our own star.
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Gallery of NASA Universe Images
Galaxies, nebulae, and supernova remnants to view or print.
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Gallery of NASA Solar System Images
Glorious planets and moons to view or print.
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View large images or print them.
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Gravity is the force by which a planet or other body draws objects toward its center.
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What kind of math would creatures with 16 fingers invent?
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Voyager 1 and 2: The Interstellar Mission
These spacecraft traveled to the outer planets!
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After all, they know only two words!
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What do you get when you cross an earthquake with a tidal wave?
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How Does NASA Communicate With Spacecraft?
We can send and receive information with the Deep Space Network!
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Learn the answer and impress your friends!
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And how does it help us find new planets?
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And how does it help us find new planets?
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Telling a pine from a maple ... from space!
What if every kind of tree were a different color?
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Building a 3-D Map of Earth from Space!
And in only 10 days!
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Explore the Electromagnetic Spectrum
The windows show the Universe in all its colors.
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And what are they made of?
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Learn more about this useful focused light source!
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Printable posters, lithographs, postcards, and bookmarks.
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Is Mira the zippiest star in the galaxy?
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This type of weather comes from activity on the Sun’s surface.
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How do these monster storms happen?
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How can one gas in the air be both good and bad?
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Help Juno reveal Jupiter's true nature.
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