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Why Pluto is no longer a planet (or is it?)



But it has been 13 years since Pluto suffered a severe decline in status – officially called Pluto's Demon Day.

Pluto was released in 2006 when the International Astronomical Union (IAU) created a new definition for the planets and decided that Pluto was out of place.

But this did not solve the question of fans of distant Pluto.

The planetary days of Pluto are remembered with kindness – it has been remarkable for decades that it was the smallest and farthest planet on our solar system. It is only about half the width of the United States and is located in a distant region of the solar system called the Kuiper Belt, which requires seeing a telescope.

The dwarf planet was also known for being the only open planet in the United States.

  IN SPACE - JULY 1[ads1]4: In this material, provided by the National Aeronautics and Space Administration (NASA), a close-up image of a region near the equator of Pluto shows a range of 11,000 feet (3500 meters) mountains, taken from NASA's New Horizons spacecraft as it crossed 7,800 feet from the dwarf planet on July 14, 2015. A 1050-pound piano probe launched on Jan. 19, 2006 aboard an Atlas V rocket Canaveral, Florida, zip from the planet yesterday. (Photo by NASA / APL / SwRI via Getty Images)

It was spotted in 1930 by astronomer Clyde Tombo at the Lowell Observatory in Arizona (named after America otherwise) astronomer Percival Lowell who believed that the Martians were digging the channels found on the surface of this planet).

The story behind Pluto's name is also known.

This was suggested by an 11-year-old girl in England who was interested in Roman legends and thought to name the ice planet after the god of the underworld was intriguing. Her grandfather conveyed the idea to a member of the Royal Astronomical Society of the United Kingdom, who then presented it to their American colleagues at Lowell Observatory. They agreed to the name Pluto – probably because PL paid tribute to Percival Lowell.

The newly discovered planet, about 3 billion miles in the sun, will be known as the "King of the Kuiper Belt."

But how the mighty fell.

And then there were eight

Things went down for Pluto in 2006, when the UIA redefined what it means to be a planet, declaring that the planet must be a celestial body orbiting the sun is circular or nearly circular and "clearing the neighborhood" around its orbit. Pluto failed in the third account as its orbit overlaps with Neptune.

The UIA reclassified it as a dwarf planet, also calling it a "trans-neptune object", which provoked outrage from students, small enthusiasts of the planet and the Internet in

For many space lovers, Pluto's decline felt suddenly. But in the academic world of astronomy, it was a process that began only decades after the discovery of the dwarf planet.

In 1992, astronomers at the observatory of the University of Hawaii at Mauna Kea discovered a small ice celestial body a little farther from the orbit of Neptune. Named the Kuiper Belt Object of the 1992 QBI, the speculation has sparked speculation that Pluto is just one of many planetary objects in the Kuiper Belt.

The latest blow came in 2003, when California Institute of Technology professor Mike Brown discovered Eris, a dwarf planet that actually has a slightly larger mass than Pluto. Astronomers have begun to suspect that more of these planets may be floating around.
Now Brown is called "The Man Who Killed Pluto" because instead of giving status to the planet of Eris and to any celestial body larger than Pluto, the UIA decided to overthrow Pluto.

New horizons resume old debate

But the debate about Pluto's condition is raging.

In 2015, NASA's New Horizons program flew past Pluto to take close-up photographs and measurements of the dwarf planet, eventually revealing that Pluto was larger than originally thought by scientists.

According to NASA, data gathered by the flying horizon of New Horizons "clearly indicate that Pluto and its moons are far more sophisticated than suspected," prompting space enthusiasts to wonder whether he will regain his status on the planet.

  Kennedy SPECIAL CENTER, FL. - In a blue sky scattered by a cloud, NASA's New Horizons spacecraft launches a launch pad aboard an Atlas V rocket that emits flames and smoke. Liftoff was on time at 14:00. EST of Complex 41 at the Cape Canaveral Air Station in Florida. This was the third attempt to launch in as many days after the weather as possible due to meteorological problems. The compact, 1050-pound piano probe will boost a stationary, solid-state engine for its journey to Pluto. New Horizons will be the fastest spacecraft ever launched, reaching moon orbit in just nine hours and crossing Jupiter 13 months later. The New Horizons scientific payload, developed under the direction of the Southwest Research Institute, includes imaging with infrared and ultraviolet spectrometers, a multi-color camera, a long-range telescopic camera, two partial spectrometers, a space dust detector and a radio-science experiment. The Dust Counter was designed and built by students from the University of Colorado, Boulder. The launch at this time allowed New Horizons to fly past Jupiter in early 2007 and use the planet's gravity as a sling to Pluto. Jupiter's flag trumps the voyage to Pluto for a full five years and provides testing capabilities for spacecraft tools and capabilities in Jupiter's system. New horizons could reach the Pluto system as early as mid-2015, conducting a five-month study, only possible from the spacecraft's close location.

Even the chief investigator of the New Horizons spacecraft, planetary scientist Alan Stern, disagreed with the IAU and claimed that Pluto was downgraded simply by its distance from the sun .

"In fact, if you put the Earth where Pluto is, it will be excluded! "Stern told CNN in 2015.

A year earlier, the Harvard-Smithsonian Center for Astrophysics also entered the debate. After a panel discussion on the definition of a planet, they let the audience vote and, of course, the crowd supported Pluto

And new research emerged last year from the Central Florida Space Institute, which argued that Pluto's decline was "invalid."

"The IAU definition will state that the main object of planetary science – the planet, should to be defined based on thread [19659002] Metzger and his team looked at studies worth over 200 years and found only one study that uses the orbital clearing standard, which

"This is a slimy definition," Metzger added. "They did not say what they meant by clearing their orbit. If you take this literally, there are no planets because no planet clears its orbit. "

Too cool for school

When Pluto was downgraded, it triggered a wave of textbook reprints to guarantee that the new millennium students will be taught. Pluto is a dwarf planet.

But it may still be the coolest (non) planet to learn – literally.

Pluto has an ice shell, dunes made of hardwood. methane ice, and mountain peaks covered with methane snow (but the snow is red instead of fluffy white). it is also home to the largest known glacier in the solar system.

In fact, Pluto is so cool that its temperature is about 400 degrees Fahrenheit below freezing and becomes even colder as it orbits farther from the sun. Pluto is so far from the sun that sunlight is as bright as the full moon on Earth, and from the surface of Pluto, the sun just looks like a bright star.

Perhaps Pluto's undeniable coolness is the reason why people continue to be intrigued by its categorization 13 years later.

"The complexity of the Pluto system – from its geology to the satellite system to its atmosphere – is beyond our broadest imagination," Stern said in a NASA statement. "Everywhere we turn, there are new mysteries."


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