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KOMPAS.com – Before astronomers know that there are so-called celestial bodies For (currently), Pluto is called the ninth planet after Neptune.

However, when astronomers discovered the FY9 2005 celestial body in 2005, its name was changed to MacMake in 2008; Pluto has been removed from the category of planets in our solar system.

Why is that? Here are some facts you need to know about MacMac:

1. Invention and name of MacMac

Reported by the official NASA page, MacMac was first launched by astronomers on March 31, 2005 at ME Brown, CA Trujillo and D. Discovered at Palomer lab by Robinovitz.

Before being officially confirmed, this celestial body was named 2005 FY9. Meanwhile, the name Makemake comes from the name of the fertility god Rabanuy on Easter Island.

Also read: Tonight the dwarf planet Macmag looks bright in the opposing sun

MacMake is the smallest planet outside the solar system and is located there Khyber belt (Khyber Belt), that is, the area outside of Neptune’s orbit.

The Khyber Belt is a universe of thousands of miniature worlds of ice and rock that formed around 4.5 billion years ago at the start of the solar system’s history.

MacMake is the fourth element to be identified as a Dwarf Planet and causes Pluto to lose its planet status.

3. The second brightest dwarf planet

Although slightly smaller than MacMut Pluto, it claims to be the second brightest Khyber Belt object visible from Earth.

Pluto is smart at first.

Although astronomers could not see the details of MacMac’s surface, its surface is similar to that of Pluto, which is red. Then, on the surface, we found methane and frozen ethane.

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4. Create a scale and a distance

With a radius of approximately 444 miles or 715 kilometers, McMake’s radius is the ninth on Earth. For example, if the earth is about the size of a nickel, MacMake is the size of a mustard seed.

At an average distance of 6,847,000.00 kilometers, MacMake is 45.8 astronomical units (AS) from the Sun. Note that sa is the distance between the sun and the earth.

From this distance, it takes 6 hours and 20 minutes for sunlight to reach the Mac.

5. Orbit and rotation

This dwarf planet takes about 305 Earth years to make a trip around the Sun.

Astronomers have called the dwarf planet’s recent trip the occult in front of the star to determine if there is an atmosphere in MacMake.

Meanwhile, in 2015, astronomers finally discovered a small object (the moon) orbiting MacMake using NASA’s Hubble Space Telescope.

This month is S / 2015 (136472) 1 and bears the nickname MK2. It is 1300 times brighter than the MacMake.

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MK2 is visible at a distance of about 13,000 miles or 20,000 kilometers from the dwarf planet, with an estimated radius of about 50 miles or 80 kilometers.

6. Studies change the history of the solar system

NASA claims MacMac holds a special place in the history of the study of the solar system because, along with Eris, he was one of the inventors of the International Astronomical Union (IAU) which reconsidered its definition of planets. and formed a new group. Dwarf planet.

As reported Space.com, (2/5/2016), in 2006 the International Astronomical Union finally created a new type of celestial body ”Dwarf planet“Or a dwarf planet.

As a result, they redistributed the definition of planets.

According to the IAU, a planet revolves around the sun, but orbits nothing else, large enough to spin under its own gravitational pull, as well as destroy the environment surrounding objects.

In this case, Pluto was excluded from the planetary category for not removing debris from its orbit.