the best science on the web about
Pluto

Facts & Info About the Dwarf Planet
Image: NASA

Facts & Info About the Dwarf Planet

Pluto lies in the outer reaches of our solar system. For more than 70 years it was considered the ninth major planet — then it was demoted.

But that hasn't stopped our interest in this distant neighbor. The space probe New Horizons is set to arrive at Pluto in 2015. What scientists know now has come from the Hubble telescope and other observatories.

Space.com
Loading...
‘8 Planets and a Dwarf’ Sudoku

‘8 Planets and a Dwarf’ Sudoku

Love puzzles? This online Sudoku-like puzzle involves all the planets of the solar system, plus Pluto. Featuring 5 levels, you can start with “very easy” and work your way up to “extra challenging.” More...

Game
Windows to the Universe
Pluto’s Secret

Pluto’s Secret

In order to survive on Pluto, you need oxygen. In this game, your goal is to gather as much oxygen as possible. After the animation, select the planet Earth to start. More...

Game
National Geographic
Why Isn’t Pluto a Planet Any More?

Why Isn’t Pluto a Planet Any More?

The decision to change Pluto's status to "dwarf planet" surprised many people, but scientists had some good reasons for making the switch. Dr. Robert Hurt explains. More...

Video
NASA
Is Pluto a Planet? The Votes Are In

Is Pluto a Planet? The Votes Are In

Many scientists and members of the public think that Pluto’s demotion to dwarf planet was a mistake. Things are looking up for the ex-planet... More...

Article
Harvard-Smithsonian Center for Astrophysics
Space School: Pluto

Space School: Pluto

What is 3.7 billion miles from the sun and USED to be called a planet? If you guessed Pluto, you are right! Who came up with that name? An 11-year-old girl! More...

Video
Discovery
Where Is New Horizons?

Where Is New Horizons?

In January 2006, the New Horizons space probe was launched on its 3000-mile journey to Pluto. It's set to arrive in the summer of 2015. See how far it's already traveled! More...

Interactive
Johns Hopkins
‘Science Guy’ Likes Pluto Change

‘Science Guy’ Likes Pluto Change

Bill Nye explains why it's a good thing that science changes and we learn new things — including why Pluto is not a planet. More...

Article
ABC
Dwarf Planets

Dwarf Planets

What makes Pluto a dwarf planet and not an actual planet? Find out more about this mysterious object that sits at the edge of our solar system and its kin. More...

Interactive
National Geographic
Imagining Pluto

Imagining Pluto

Ever wondered what it would be like to visit Pluto? For starters, you'd want to pack your cold-weather gear! Take a look at what conditions are like on this dwarf planet. More...

Video
National Geographic
Passport to Pluto

Passport to Pluto

In the more than 80 years since Clyde Tombaugh discovered Pluto, scientists have never seen a picture of its surface. That will change if the New Horizons space probe, launched in 2006, is successful. More...

Video
Space.com
Photos of Pluto and Its Moons

Photos of Pluto and Its Moons

While we haven't been able to see Pluto's surface yet, the Hubble Space Telescope has provided us with the best pictures we have of Pluto and its moons. More...

Images
Space.com
Pluto Facts

Pluto Facts

Why is Pluto no longer considered a planet? How cold does it get there? And how far away is it? Get the facts here. More...

Article
Planet Facts

Latest Comments

You Also Might Like

  1. supernovas

    supernovas

  2. space tornadoes

    space tornadoes

  3. constellations

    constellations

  4. galaxies

    galaxies

  5. light pollution

    light pollution