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should pluto be a planet pros and cons

Please deactivate your ad blocker in order to see our subscription offerArtist's impression of Pluto and Charon as seen from one of Pluto's other moons.Now it appears that Pluto reigns —though only by the slimmest of margins (the numbers are so close as to benearly indistinguishable, when uncertainties are taken into account). You will receive a verification email shortly.There was a problem. "We are going to learn so muchmore about the solar system with our new understanding of what Pluto is.

Which would be really cool, he says, “but it would just feel kind of fraudulent.” If Earth circled the sun inUranus' orbit, it wouldn't be able to clean out its neighborhood and would thusnot qualify as a planet, Stern said.In Stern's view, a planet is anything thatmeets the IAU definition's first two criteria — the bits about orbitingthe sun and having enough mass to be roughly spherical, without the"clearing your neighborhood" requirement.So Pluto should be a planet, as should Erisand the Such a definition would greatly expand thelist of planets in the solar system.Many astronomers were uncomfortable with thisprospect, according to Stern, and that discomfort was a big factor in thedecision to demote Pluto. "Astronomers have a much better sense of whatPluto is now, according to Brown. Or is the current system, whichrecognizes just eight relatively large planets, the way to go? Pluto isabout 1,455 miles (2,342 km) wide. NY 10036. A decade ago, when he and the Hayden staff redesigned theplanetarium's exhibits, they lumped Rather, the IAU's planet definition isfundamentally flawed, some astronomers say.They take particular issue with the"clearing your neighborhood" requirement, for several reasons. "Many people think it's special to be aplanet," Stern said.But adding a bunch of names to the listwouldn't cheapen the ones that had been there forever, he added. The problem is that it’s hard to tell whether an object 3. Now that Pluto may have regained its statusas the largest object in the outer solar system, should astronomers considergiving it back another former title — that of full-fledged planet?Pluto was demoted to a newly createdcategory, "dwarf planet," in 2006, partly because of the discovery ayear earlier of Eris, another icy body from Pluto's neighborhood.

Future US, Inc. 11 West 42nd Street, 15th Floor, Please refresh the page and try again.Space is part of Future US Inc, an international media group and leading digital publisher. The nerve! "We can go back and reassess the mistakes of our ancestors. It should be a planet. © ]SPACE.com asked some experts to weigh in onthis debate, which affects how astronomers view the solar system, as well ashow complicated schoolchildren's planet-memorizing mnemonics must be:Eris is about 9 billion miles (15 billion kilometers)from the sun at its farthest orbital point, making it about twice as distant asPluto. "It's the Earth-like planetsand the giant planets that are freakish. "It doesn't celebrate thescientific richness of the solar system. "It just makes no sense from aclassification standpoint to take these objects that clearly belong togetherand pick one — or two, or a dozen — and say, 'Oh, these belong withthe very different, large, planet-like things," Brown said.The only reason Pluto was ever deemed aplanet, Brown added, is because it was first detected so long ago, before peoplerealized that it was just one of a vast flotilla of objects beyond Neptune'sorbit.The Kuiper Belt— which is now known to host more than 1,000 icy bodies, with many morelikely to be discovered — wasn't even discovered until 1992.

A planet must “clear the neighborhood” around its orbit.This statement is both unclear and misleading–misleading because no part of the Solar System is truly “cleared” and unclear because there is no accepted (Granted, it is thought that planetary systems evolve in such a way that they are always just barely stable over the age of the system, but that’s another story. Inthat understanding, small, icy planets far outnumber big gassy or rocky ones. It's more revealing to groupobjects that are similar in size, composition and other properties. So Pluto should be a planet, as should Erisand the dwarfplanet Ceres(the largest body in the asteroid belt between Mars and Jupiter), as well asmany other objects. "It's just a funny historical accidentthat we found Pluto so early, and that it was the only thing known out therefor so long," Brown told SPACE.com. New York, No. "So Pluto should take its rightful placealongside other Kuiper Belt objects rather thanconsort with the "real" planets, some astronomers say.

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