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From Space.Com: Pluto Planet Debate Flares Up Again


Science & Tech  (tags: astronomy, Pluto, Planet, Debate, ancient, discovery, history, humans, interesting, nasa, news, research, science, scientists, world )

Fiona
- 68 days ago - space.com
The long-simmering argument about Pluto's planethood has just flared up again. For more than 75 years after its 1930 discovery, Pluto was regarded as our solar system's ninth planet âEUR" a distant and frigid oddball



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Comments

Fiona O (565)
Saturday May 12, 2018, 10:26 am
Then, in 2006, the International Astronomical Union (IAU) reclassified Pluto as a "dwarf planet," a newly created category that the organization explicitly stressed made Pluto distinct from the eight "true" planets.

A true planet, according to the IAU's newly devised definition, must meet three criteria: It must circle the sun and no other object (so, moons are out); it must be big enough to be rounded into a sphere or spheroid by its own gravity, but not so large that its innards host the fusion reactions that power stars; and it must have "cleared its neighborhood" of other orbiting bodies.

More information on site.

On site find a photograph of Pluto and its moons.

Please note, comment, and forward.
 

Laura H (964)
Saturday May 12, 2018, 10:40 am
Pluto will always be a planet to me :)
Thanks Fiona.
 

David C (120)
Saturday May 12, 2018, 11:31 am
While Pluto is awesome, does it really matter? It's odd that the debate either says "no" or "yes, but there are many many others, too"...…...I didn't see it becoming "Pluto is our 9th planet and there aren't others" as we said for 75 yrs
 

Colleen L (3)
Saturday May 12, 2018, 3:24 pm
Interesting. Pluto has been there a long time. I agree with Laura that it will always be a planet. No ifs or buts about it. Thanks Fiona
 

Animae C (516)
Saturday May 12, 2018, 4:21 pm
"...the IAU's decision stemmed at least partly from a very nonscientific desire to keep the solar system's planetary stable down to a "manageable" number."
That's dumb!

Thanks for voting!
Should Pluto be classified as a dwarf planet or a full-fledged world?
i voted 'full fledged planet'
Thanks for voting!

Dwarf Planet 37% (7306 votes)
Full-fledged Planet 48% (9314 votes)
I'm not sure - we need to wait and see. 15% (2940 votes)
Total Votes: 19,560

Pluto is a PLANET! 🌐

Shared
TY Fiona
 

Chrissie R (5)
Sunday May 13, 2018, 6:36 am
I still don't understand the basis for the debate. Pluto is a small planet at the outer edge of our solar system.
 

Margie F (148)
Saturday May 19, 2018, 2:01 am
Should still be one of our planets.
 
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