One of the biggest “controversies” in astronomy in the last decade has been the “demotion” of Pluto from “planet” to “dwarf planet.” This has been a topic for a while, but got kicked up a notch in January 2005, when a team led by astronomer Mike Brown of California Institute of Technology discovered an object in the Kuiper Belt (a belt of objects beyond Neptune, of which Pluto is a part) that is larger than Pluto. This got a lot of attention from the public, in part because Pluto somehow intrigues people as the “little guy” in the solar system. To most scientists, this is mainly a matter of semantics. What we call the object doesn’t change what it is or where it is or the fact that it is an interesting thing to study (the New Horizons spacecraft is on its way there right now). Take a look at the articles below, then write a discussion board post about your own thoughts about this. Is it a useful discussion to have among scientists? Among the public? Does it help or hurt efforts to encourage interest in astronomy?
Video of Mike Brown: www.youtube.com/v/ddC3AKJXolk
Pluto’s Honor. (Tyson, Neil. Natural History Magazine. February 1999.) www.haydenplanetarium.org/tyson/read/1999/02/01/plutos-honor (Note that this was written before the discovery of Eris.)
Breaking News – Pluto Not a Planet (Plait, Phil. Bad Astronomy Blog. August 24, 2006.) blogs.discovermagazine.com/badastronomy/2006/08/24/breaking-news-pluto-not-a-planet/
Instructions: Your initial post should be at least 200 words. Please respond to at least two other students (more is great). Responses should be a minimum of 100 words and be substantive (furthering the discussion, not merely saying “good post”).
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