5 Dwarf Planets in our Solar System

5 Dwarf Planets In Our Solar System

Dwarf planets in our Solar System are Pluto, Eris, Haumea, Makemake and Ceres. It is estimated that there are more than 200 dwarf planets in the Kuiper belt of the outer Solar System and possibly more than 10,000 in the region beyond. A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite. It is a body orbiting the Sun that is big enough to round itself by its own gravity, but has not cleared its orbital path of other rival bodies. So let’s discover which ones are 5 dwarf planets in our solar system.

Pluto is Smaller than Earth’s Moon

Pluto is one of the  dwarf planets in our Solar System. The dwarf planet is the ninth largest body that moves around the Sun. At first, Pluto was called a planet. Now, it is the largest body in the Kuiper belt. Pluto is not very big. It is only half as wide as the United States. It is smaller than Earth’s moon. This dwarf planet takes 248 Earth years to go around the sun. If you lived on Pluto, you would have to wait 248 Earth years to celebrate your first birthday. One day on Pluto is about 6 1/2 days on Earth. Pluto is only 2,300 kilometers wide. That means it is 1,400 miles’ wide.

Pluto is Smaller than Earth's Moon
Pluto is Smaller than Earth’s Moon

 

Eris is about the Same Size as Pluto

Eris is one of the largest known dwarf planets in our solar system. It’s about the same size as Pluto, but is three times farther from the sun. Eris was discovered on October 21, 2003 by M.E. Brown, C.A. Trujillo, and D. Rabinowitz at the Palomar Observatory. Eris most likely has a rocky surface similar to Pluto. Scientists think surface temperatures vary from about -359 degrees Fahrenheit (-217 degrees Celsius) to -405 degrees Fahrenheit (-243 degrees Celsius). The dwarf planet is often so far from the sun that its atmosphere collapses and freezes, falling to the surface as snow. As it gets closest to the sun in its faraway orbit, the atmosphere melts.

Eris is about the Same Size as Pluto
Eris is about the Same Size as Pluto

 

Makemake Is Made Mainly of Ice and Rock

Makemake is a dwarf planet. It was discovered on March 31, 2005 by astronomers Michael E. Brown, Chad Trujillo and David Rabinowitz. Makemake is a Trans-Neptunian object, because it orbits the Sun further out than Neptune. The International Astronomical Union gave it the name Makemake, the creator god of the ancient Easter Island people, to keep its connection with Easter. Makemake appears to be made mainly of ice and rock. However, at its very low temperature, ice is as hard as many types of rock.

Makemake Is Made Mainly of Ice and Rock
Makemake Is Made Mainly of Ice and Rock

 

Ceres Is the Smallest Dwarf Planet in Our Solar System

Ceres is one of the dwarf planets in our Solar System and the smallest one.  It was discovered on 1 January 1801, by Giuseppe Piazzi, and is named after the Roman goddess Ceres: the goddess of growing plants, the harvest, and of motherly love. With a diameter of about 950 km, Ceres is by far the largest and most massive object in the asteroid belt, and has about a third of the belt’s total mass.

Ceres Is the Smallest Dwarf Planet in Our Solar System
Ceres Is the Smallest Dwarf Planet in Our Solar System

 

 Haumea is the Fifth Discovered Dwarf Planet

Haumea is one of the dwarf planets in our Solar System. Its discovery was announced in 2005 by astronomers Michael E. Brown, Chad Trujillo and David Rabinowitz of the United States. It was classified as a dwarf planet on September 17, 2008. Haumea is a Trans-Neptunian object, because it orbits the Sun after Neptune. It has two known moons, Hiʻiaka and Namaka. Haumea is special because of its very short day and odd shape. It turns once on its axis every four hours. This quick turning has caused Haumea to be shaped like an ellipsoid. It was the fifth discovered dwarf planet.

Haumea is the Fifth Discovered Dwarf Planet
Haumea is the Fifth Discovered Dwarf Planet