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Have you ever wondered why Pluto lost its status as a planet? This video explains why it happened and shows the set of criteria that scientists use to determine a celestial body’s status as a planet or not.
Is Pluto a planet? [via Geeks are Sexy]
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After over 50 years of calling Pluto a planet, calling it anything but is a bit of an adjustment.
Well, that was actually very educational. I had heard about Pluto being kicked out of the club but thought it was because of the size. This sounds more reasonable and acceptable.
It is difficult to get used to the change, but it makes sense. Pluto is smaller than other non-planet bodies that also orbit the Sun. What exactly defines a planet seemed to be easier back in college during astronomy or astrophysics classes – before all the smaller bodies were discovered. With those discoveries, more exact definitions are needed.
Actually, the video didn’t say much about the criteria for calling a solar system object a planet. Sure it talked about orbiting the sun, but what about the criterion that it ought to have hydrostatic equilibrium, or the criterion that it has “cleared its neighborhood” of all significant debris?
Definition of a Planet near Sol:
One of the 8 bodies orbiting the sun named Mercury, Venus, Earth, Mars, Jupiter, Saturn or Uranus. Under no circumstances will anything else in the system be classified as a planet, ever.
@ Steve. Don’t count on it. The definition of planet has changed several times over the years; it could change again. There is also the possibility of a previously undetected object orbiting by its lonesome out past Pluto that could qualifiy as a planet (granted, it’s highly unlikely).
This just in:
The Neptunians have declared war on Steve.
We’ll all pay for his error.
wow wouldn’t it be interesting if some day they found life on it lol
Despite the widely propagated belief that throwing rice at weddings poses a danger to birds, the rice is harmless.
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