Pluto, the Dwarf Planet

All about pluto


Have you ever thought there was something else in space? That's what astronomers had thought. They thought there was a planet called Planet X. Astronomer Clyde Tombaugh was searching for planet X but instead he found another planet! The astronomers started studying the "new planet," and they eventually found a name: Pluto. Pluto was named after the god of the underworld because it was so far away from the Sun. Although later on, astronomers reclassified the planet pluto to a dwarf planet. In this article, you would learn, what Pluto looks like, how different it's compared to Earth. Finally, you will also learn why it is a dwarf planet.

What does it look like?

Pluto is very very tiny if you compare it to the other planets. In fact, it's smaller than seven of the solar system's moons. Also, since it's 3.6 billion miles away from the sun, it's extremely cold. The temperature is -387 to -369. Pluto also is icy and watery and even though it's really tiny, it's the second biggest dwarf planet.

How is it different compared to Earth?

If you compare it to Earth you'll find out it's very different. For example, Earth isn't that far from the sun. If you look at Pluto you'll see it's way back in the Kupier Belt. Where all the other dwarf planets are. In fact, it's 40 times farther away from the sun. Also, it's different from Earth because it's smaller... way more smaller. Also Earth takes 1 year to orbit the sun, but Pluto takes about 248 years! So you would only have 1birthday if you lived on Pluto. Finally, Pluto's orbit is pretty different than the other planets . For example, it's orbit is sort of egg- shaped and it goes into Neptune's orbit. As you can see, Pluto is very different compared to Earth.

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Why is it a dwarf planet?

When astronomers first found Pluto they noticed it was a little different from other planets, including it's orbit and the planet itself. For example, its orbit runs into Neptune's orbit. Also, it was tinier than astronomers thought it looked. They also found lots of other planets that were like Pluto.When astronomers got together, they voted off Pluto as a planet and said it was a dwarf planet.

You probably think Pluto is a dwarf planet because it's tiny. That's particularly one of the reasons, but it's also because there are 3 rules to be a planet:

1. It has to orbit the sun

2. It must be round

3. It must clear its neighborhood ( clear it's path )

So, because Pluto can't clear its path, astronomers reclassified it as dwarf planet.

Why Isn't Pluto a Planet Any More?

Fun Facts

  • An eleven-year old girl suggested the name Pluto.
  • Pluto is 3.6 billion miles from the sun
  • If you weigh 100 pounds on Earth, you'll weigh 7 pounds on Pluto
  • One of Pluto's moons' is pretty close so some people say it's a double planet
  • A spacecraft called New Horizon was sent to Pluto to study it in 2015 ( this year)


I realize that Pluto is very interesting. For example, it was the very first dwarf planet to be found, and instead of its orbit being a perfect circle around the sun, it's an oval around the sun and crosses Neptune's path. Also, in the day time you can still see the stars because it's that dark. In conclusion, I have learned lots of amazing facts about Pluto.


  • Docter Robert Hurt. Why isn't pluto a Planet ? video
  • Ducksters. dwarf planet Pluto. website
  • Esa kids. Planets and moons. website
  • Highlights kids. Why isn't Pluto no longer a planet? website
  • Nasa. What is
  • Planets for
  • Random facts. Planets and
  • Scholastic. Pluto. website
  • Science a-z. Pluto. article


  • astronomers- people that study space.
  • reclassified- put in another category
  • solar system- planets with moons that orbit around the sun together along with astroids, comets, etc.
  • kupier belt-a place where all the dwarf planets are
  • orbit- a circular path for planets etc thats around the sun
  • spacecraft- a vehicle for space
  • dwarf planet-a body-like planet that orbits the sun but isn't a really planet
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Rebekah E.

Fourth Grade Student