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Post by Jonesy1 on Feb 23, 2017 18:57:41 GMT
jonesy1: re: The Planetary Suite Nice, but long. I'm going to have to listen to the rest over the weekend. Thanks for posting. You're welcome. |
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puvo
Sophomore
@puvo
Posts: 575
Likes: 78
 
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Post by puvo on Feb 23, 2017 21:24:24 GMT
Thanks, Eva. I'm glad you are interested in the topic. So, if the boys at NASA put their domes together and decide that yes, Pluto is a planet, it will mean that Pluto was always a planet, although for about a decade and a half Pluto was never a planet, but merely a dwarf planet, which is kind of like a planet, but not really. Got it. Haha, no, you didn't get it. |
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Post by marianne48 on Feb 23, 2017 23:35:32 GMT
I don't care what those boys at NASA say, Pluto never stopped being a planet in my heart. I'd be glad to see it officially promoted again. Maybe the girls at NASA couldn't resist that adorable heart that's visible in recent pictures of this cute little planet. Awwwww....
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Post by awhina on Feb 23, 2017 23:59:13 GMT
jonesy1: re: The Planetary Suite Nice, but long. I'm going to have to listen to the rest over the weekend. Thanks for posting. It's one of the best pieces of music ever written. I have several recordings of it with different conductors. |
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Post by FilmFlaneur on Feb 24, 2017 10:10:28 GMT
jonesy1: re: The Planetary Suite Nice, but long. I'm going to have to listen to the rest over the weekend. Thanks for posting. It's one of the best pieces of music ever written. I have several recordings of it with different conductors. Rather ironically, given the topic under discussion is the fact that Holst's famous work The Planets does not include a musical representation of Pluto, it being not discovered when he wrote it. 'Pluto' was added by another British composer, Colin Matthews more recently, and has been included on some recordings. |
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Post by FilmFlaneur on Feb 24, 2017 10:17:53 GMT
So, if the boys at NASA put their domes together and decide that yes, Pluto is a planet, it will mean that Pluto was always a planet, although for about a decade and a half Pluto was never a planet, but merely a dwarf planet, which is kind of like a planet, but not really. Got it. You're misunderstanding me. Asking "is Pluto a planet" depends entirely on how we define "planet." How we define "planet" is not dependent on any facts about Pluto. Pluto doesn't change depending on how we choose to define it. Pluto was the same before we knew it existed, when we discovered it and called it a planet, when NASA decided it wasn't a planet, and it will stay the same if they decide to call it a planet again. The only thing that's changed is our definition. So, again, there's nothing to "believe NASA" about. Deciding how to define words isn't dependent on any factual statements about the objects we're trying to classify. That article I posted lays this out as lucidly as possible. The definition of a planet, agreed by IAU a few years ago is as follows:
1.The object must be in orbit around the Sun.
2.The object must be massive enough to be rounded by its own gravity. More specifically, its own gravity should pull it into a shape defined by hydrostatic equilibrium.
3.It must have cleared the neighbourhood around its orbit
Pluto is currently categorised as a Dwarf or minor-planet.
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