Sinfest

[Agamemnon]

Astronomers say Pluto is not a planet

25 minutes ago
ASSOCIATED PRESS


PRAGUE, Czech Republic - Leading astronomers declared Thursday that Pluto is no longer a planet under historic new guidelines that downsize the solar system from nine planets to eight.

After a tumultuous week of clashing over the essence of the cosmos, the International Astronomical Union stripped Pluto of the planetary status it has held since its discovery in 1930. The new definition of what is — and isn't — a planet fills a centuries-old black hole for scientists who have labored since Copernicus without one.

Although astronomers applauded after the vote, Jocelyn Bell Burnell — a specialist in neutron stars from Northern Ireland who oversaw the proceedings — urged those who might be "quite disappointed" to look on the bright side.

"It could be argued that we are creating an umbrella called 'planet' under which the dwarf planets exist," she said, drawing laughter by waving a stuffed Pluto of Walt Disney fame beneath a real umbrella.

The decision by the prestigious international group spells out the basic tests that celestial objects will have to meet before they can be considered for admission to the elite cosmic club.

For now, membership will be restricted to the eight "classical" planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

Much-maligned Pluto doesn't make the grade under the new rules for a planet: "a celestial body that is in orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a ... nearly round shape, and has cleared the neighborhood around its orbit."

Pluto is automatically disqualified because its oblong orbit overlaps with Neptune's.

Instead, it will be reclassified in a new category of "dwarf planets," similar to what long have been termed "minor planets." The definition also lays out a third class of lesser objects that orbit the sun — "small solar system bodies," a term that will apply to numerous asteroids, comets and other natural satellites.

It was unclear how Pluto's demotion might affect the mission of NASA's New Horizons spacecraft, which earlier this year began a 9 1/2-year journey to the oddball object to unearth more of its secrets.

The decision at a conference of 2,500 astronomers from 75 countries was a dramatic shift from just a week ago, when the group's leaders floated a proposal that would have reaffirmed Pluto's planetary status and made planets of its largest moon and two other objects.

That plan proved highly unpopular, splitting astronomers into factions and triggering days of sometimes combative debate that led to Pluto's undoing.

Now, two of the objects that at one point were cruising toward possible full-fledged planethood will join Pluto as dwarfs: the asteroid Ceres, which was a planet in the 1800s before it got demoted, and 2003 UB313, an icy object slightly larger than Pluto whose discoverer, Michael Brown of the California Institute of Technology, has nicknamed "Xena."

Charon, the largest of Pluto's three moons, is no longer under consideration for any special designation.

Brown was pleased by the decision. He had argued that Pluto and similar bodies didn't deserve planet status, saying that would "take the magic out of the solar system."

"UB313 is the largest dwarf planet. That's kind of cool," he said.
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-Agamemnon.....but you can call me Jake.

P: They don't know we know they know we know. And Joey, you can't say anything!

J: Couldn't if I wanted to.

[Michael]

ags!

[Celaeno]

Oh, swooped. I was going to post this.

I was in Prague while they were doing this. I should've crashed it.

[andrew]

I was under the impression that this had been decided roughly a decade ago; I remember reading about it in the papers, and my younger brother was taught the revised solar system model years ago.

[Agamemnon]

This just makes it official. There was a huge movement to try to save Pluto, mostly by school children whom I squish beneath my almighty arrogant "planet" definitions, muahahahahahahaha!
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-Agamemnon.....but you can call me Jake.

P: They don't know we know they know we know. And Joey, you can't say anything!

J: Couldn't if I wanted to.

[andrew]

Side Note: I wonder, Kara, if the scientists followed their conclusion with a meal, promptly making themselves sick?

[Michael]

[Drui]

My very eager mother just served us NOTHING. YOU GET NOTHING.
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fight

[Agamemnon]

[Some Guy!]

I liked Colbert's version:

"My very educated mother just said 'Uh-oh! No Pluto!'"
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"An eye for an eye makes the whole world blind."
-Mohandas Karamchand Gandhi
(Sorry I can't spell)
-!

[Agamemnon]

That's great, SG!!!
_________________
-Agamemnon.....but you can call me Jake.

P: They don't know we know they know we know. And Joey, you can't say anything!

J: Couldn't if I wanted to.

[mouse]

i heard on the radio this morning that pluto was also excluded because it wasn't large enough to clear other objects from its orbit.

it's a little sad, in a way - but also neat, because a planet named 'xena' probably wouldn't have been acceptable, but a dwarf planet (or whatever it is now) could be.
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aka: neverscared!

[jwing]

My Vibrator Exudes Much Joy, So Use Nightly.

taken from someone's lj. (not mine!)

[Agamemnon]

Um....yeah....try to explain that one to my third grade class....


"It's an electric...ear...cleaner"

"It sure is big!"

"It sure was..."
_________________
-Agamemnon.....but you can call me Jake.

P: They don't know we know they know we know. And Joey, you can't say anything!

J: Couldn't if I wanted to.

[Marik]

I have hungry ears, darlings.