You all must have known it, if Pluto is now not a part of the planets in our solar system.But did you also know, from when the decision was taken and what is the consideration? Well if you do not already know, the following explanation.Starting August 24, 2006 do not ever say Pluto slipped again.
Because since that day, Pluto was decided no longer entitled to a designation as a planet.The International Astronomical Union General Assembly (International Astronomical Union / IAU) to-26 in Prague, Czech Republic, producing historic decision in the world of astronomy to remove Pluto from the list of planets in our Solar System.
From now on, members of the Solar System consists of only eight planets, namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Pluto issue a decision that has become a member of the Family Planet Solar System for 76 years is a consequence of enactment of a new definition of planet.
Resolution 5A The IAU General Assembly-26 contains a new definition.
* In the resolution stated, an object can called a planet if it meets three conditions:
- Orbiting the Sun
- Large enough so as to maintain a round shape
- Having a clear orbital path and "clean" (no object Another sky was in orbit)
The definition is the first universal definition of planet since the term planet known among astronomers, even before the era of Nicolaus Copernicus in 1543 proved that Earth is one planet that rotates around the Sun.With the new definition, Pluto is not entitled to bear the name of the planet because it does not qualify a third. Pluto orbits the planet Neptune's orbit so that the cut in his journey around the Sun, Pluto is sometimes closer to the Sun than Neptune.
Little Planet (Dwarf Planets)
Pluto and then enter in a new family called dwarf planets ordwarf planet (dwarf planets). This family consists of Pluto andother heavenly bodies in the solar system similar to Pluto, includingin it the largest asteroid Ceres, Pluto's satellite, Charon, and someother celestial bodies only recently discovered.
According to the Director Bosscha Observatory in Lembang, West Java, Dr Taufiq Hidayat, IAU General Assembly's decision is the culmination of scientific debate in astronomy that has been going on since the early 1990s and then.
The debate was triggered many new discoveries that cast doubt on whether Pluto still qualifies as a planet or not."Characteristics of Pluto is different from other planets. Even their chemical composition is more like a comet than a planet," said astronomer who studied sciences planet.In addition, technological developments also led to the discovery telescope various celestial bodies that fall into the Kuiper Belt Objects (Kuiper Belt Object / OBC).
Kuiper Belt itself is the name for the region outside the orbit of Neptune to a distance of 50 Astronomical Units (AU / 1 Astronomical Unit = average distance to the Sun-Earth, which is about 149.6 million kilometers) from the Sun.
Some of the KBO (Kuiper Black Object) is attractive because of similarly sized or even larger than Pluto (diameter 2300 km) and some have satellite or "moon".
Some of these objects, among others, Quaoar (diameter 1,000 km-1,300 km), Sedna (1180 km-1800 km), and the most famous is the object called 2003 UB313 found in Michael Brown of the California Institute of Technology (Caltech) in 2003 .Object nicknamed Xena has a diameter of 2400 km, which means larger than Pluto.
Xena had in a scene right as the 10th planet of the Solar System.Since then, continued Taufiq, there is a difference of opinion among astronomers. "The choice is to enter Ceres, Charon and 2003 UB313 into the family of planets, so the number of planets to 12, or exclude Pluto.
Finally, the second option is agreed," said former Chairman of the Department of Astronomy Institute of Technology Bandung.The agreement itself has not come easily. Taufiq said the decision was even achieved by way of a vote among the members of the IAU who were present when preceded by a fierce debate.Four senior astronomer from Indonesia participated in the IAU General Assembly, namely Jorga Ibrahim, Iratius Radiman, Suryadi Siregar, and Mrs. Permana Permadi.
Some predict the debate over Pluto's status will not end here. Alan Stern, head of NASA's space shuttle mission, New Horizon, which was launched to Pluto, in January, admitted feeling "ashamed" of the decision. Nevertheless, the mission worth 700 million U.S. dollars and will arrive at Pluto in 2015 it will still continue. "This is really a definition of reckless."Removal degreeNaturally title planet of Pluto's removal sparked an emotional reaction.
Pluto is so far has its own place in the hearts of astronomers, both professional and amateur. Pluto is often considered "The Youngest of the Solar System" because it is farthest from the Sun and found the end than the eight other planets.Pluto's orbit is very elliptical and not parallel to the plane passes other planets can also make this unique planet.
Pluto was once regarded as the answer to the mystery of Planet X, a hypothetical planet which is presumably outside the orbit of Neptune and cause interference with the orbits of the planets Uranus and Neptune.Although the size of Pluto and then proved too small to be Planet X, these allegations become part of the legend of Pluto.
Info: From various sources ----------------------------------------------------------------------------------------------------------------
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