National Pluto Demoted Day will be August 24, and we’re getting out our telescopes in order to continue the spirit of planetary research! It’s hard to believe that Pluto, after almost 80 years of being an official planet was finally declassified as a dwarf planet.

 The International Astronomical Union (IAU), determined in 2006 that Pluto was not the dominant object in the sun’s orbit, and therefore could no longer be considered an official planet. It is home to other large bodies, including Pluto’s moon.


Clyde Tombaugh was the first to discover Pluto in 1930. He made it the ninth planet in our solar system. It is a fairly cold planet, and it exists outside of Neptune’s orbit.

Lowell Observatory received over 1000 suggestions to name the new planet after its discovery. Pluto was named after the Roman god of the underworld.

After the discovery of large objects within its region in 1992, there were questions about Pluto’s status as a planet. One such object was actually larger than Pluto. In 2006, the International Astronomical Union settled on a definition of ‘planet’ that ultimately excluded Pluto. It has been called a “dwarf planet” from that point onward.

A dwarf planet is a celestial body orbiting the sun that is large enough to assume a nearly circular shape but has not cleared the orbital area and is not a Moon.


1930 First Discovered

Clyde Tombaugh discovered Pluto for the first time and determined it to be the ninth planet in the solar system.

1978Pluto’s Largest Moon

The United States Naval Observatory discovered Charon, the largest of Pluto’s five moons.

2005Other Large Bodies

In 2005 Eris, another dwarf planet with a larger mass than Pluto is discovered in the Kuiper Belt (a region of icy objects that lies outside Neptune’s orbit).

2006 The Demotion

Officially, Pluto is no longer considered a full-size planet by the International Astronomical Union (IAU).


What number of moons does Pluto possess?

It is interesting to note that Pluto orbits five moons. These moons are called Charon, Styx and Nix, Kerberos, and Hydra.

Is there a spacecraft that has ever reached Pluto?

Yes! Yes!

What is Pluto’s size?

Pluto is much smaller than the planet Earth. It is less than one-fifth of the Earth’s size at 1,473 miles in diameter.


  1. Try some papier mache!As children, we all made volcanoes from papier mache and tried to avoid making too much mess. There is no better way to celebrate Pluto’s birthday than to get out flour, water, and old newspaper strips, and create the solar system. This is a great way for kids to have fun and also provides some education about the planet.
  2. Space documentary – Watch it While documentaries on celebrities and murders get a lot of press, there are many interesting ones about planets. There are many universes outside your window. This is your day to learn more about Pluto, and all the other planets.
  3. Stargazing is a great way to get in touch with the stars although most of us cannot afford expensive telescopes like those at fancy observatories and other facilities, we can still try stargazing. You can even see Pluto! To help you in your search, you will need a good telescope and a star atlas.


  1. One day on Pluto is equal to six Earth days day on Pluto takes 153 hours due to its distance from Sun.
  2. The origin of the name Venetia Burney, a young girl of 11 years, came up with the name Pluto when she was in 1930.
  3. Winter jacketPluto’s surface is extremely cold with temperatures ranging from -378degF up to -396degF.
  4. It’s a long way to the SunPluto is located 3.6 billion miles from the Sun.
  5. Planet Before Uranus was officially discovered in 1930, astronomers believed there was an additional planet that would explain Uranus’s orbit. This planet is known as Planet X.


  1. Everyone loves an underdogPluto is the smallest planet in the solar system. It’s easy for people to cheer on this planet. People have been taught for generations that the sun orbits nine planets. Its classification as a dwarf planet has sparked renewed interest in Pluto and other planets in the Milky Way galaxy.
  2. The fascination for the universe there is still many things to be learned about the solar system, and the wider universe in which our lives take place. Pluto’s demotion serves as a reminder of how we continue to learn and investigate, not just our planet Earth but also the sister planets. Reclassifications such as this might be necessary as astronomers and scientists discover new information.
  3. Fun planetsEveryone is interested in planets, no matter their age. No matter if you’re a youngster who is just starting to learn about the solar system or an adult with some astrology knowledge. The prospect of studying planets is tantalizing, much like the dinosaurs. It’s a great excuse to geek out by having a day dedicated to Pluto, the dwarf planet.

By admin