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Big Tno Discovery |
 Jul 29 2005, 08:03 AM
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#1
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 Member  Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12  |
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Jul 31 2005, 09:36 AM
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#2
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 Member Group: Members Posts: 362 Joined: 12-June 05 From: Kiama, Australia Member No.: 409 |
What peculiar little creatures we humans are that we find it necessary to have everything assigned to its correct pigeon hole. I cant see the slightest relevance to this decision as to whether we call it a planet or not. " It orbits, therefore it is" and "A rose by any other name would smell as sweet"
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Jul 31 2005, 11:06 AM
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#3
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 Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Based on the ongoing discussion, I made following flow diagram in order to adress main objection rised up to now.
PIANETI.DOC ( 19K )
Number of downloads: 504This general method should correctly discriminate between a natural satellite (a planet if central body is a star or a moon for an object orbiting a planet) and a planetoid/”satelloid” isolated or belonging to a wide population like asteroids belt or KB. Obviously, this is only a sketch and numerical constraint on radius and semi-major orbit can be revised... Anyway, I deribely avoided to use absolute measures (like size in Km) in order to have a general method that can apply also to planet/moons systems. Obviously, these pure numbers are choosen in order to include all solar system planets; inclusion of Pluto and other major KBO could be temporary, because it depends on future discovery of other objects with similar orbit. This is the normal historical process higlighted by Alan... -------------------- I always think before posting! - Marco -
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SFJCody Big Tno Discovery Jul 29 2005, 08:03 AM
mike Planet X, or perhaps Rama I. Jul 29 2005, 08:17 AM slinted Interestingly enough, it had already been found by... Jul 29 2005, 09:16 AM
Bob Shaw Hmmm... ...a candidate for a post-Pluto encounter,... Jul 29 2005, 09:55 AM TheChemist BBC article : Distant object found orbiting Sun Jul 29 2005, 11:52 AM volcanopele While K40506A/2003 EL61 now appears to be smaller ... Jul 29 2005, 09:55 PM Sunspot WOW............when will there be an official anno... Jul 29 2005, 10:15 PM volcanopele QUOTE (Sunspot @ Jul 29 2005, 03:15 PM)WOW...... Jul 30 2005, 12:58 AM odave The article quotes Brown as saying it will be ... Jul 30 2005, 01:32 AM Jyril That's not all!
There are third large KBO... Jul 29 2005, 11:29 PM Decepticon Is the object at it's closest approach to the ... Jul 30 2005, 03:20 AM Decepticon http://www.space.com/scienceastronomy/050729_new_p... Jul 30 2005, 03:22 AM remcook Methane on the surface as well...another frozen-ou... Jul 30 2005, 11:28 AM BruceMoomaw According to the NY Times, it's nowhere near p... Jul 30 2005, 11:42 AM dilo In a previous thread, few months ago, I proposed a... Jul 30 2005, 01:10 PM Rob Pinnegar QUOTE (BruceMoomaw @ Jul 30 2005, 05:42 AM)Pe... Jul 30 2005, 03:32 PM Mongo QUOTE (BruceMoomaw @ Jul 30 2005, 11:42 AM)Pe... Jul 30 2005, 04:09 PM Myran Bruce. Just wait until they have found a thousand ... Jul 30 2005, 12:37 PM tedstryk QUOTE (Myran @ Jul 30 2005, 12:37 PM)Bruce. J... Jul 30 2005, 01:52 PM Alan Stern QUOTE (Myran @ Jul 30 2005, 12:37 PM)Bruce. J... Jul 30 2005, 02:03 PM Sunspot Any idea what the dates would have been for the la... Jul 30 2005, 02:22 PM alan about 1700, roughly magnitude 14.5
next about 2250 Jul 30 2005, 03:04 PM Decepticon With all these discovers which web page has a list... Jul 30 2005, 03:52 PM alan QUOTE (Decepticon @ Jul 30 2005, 03:52 PM)Wit... Jul 30 2005, 05:34 PM Myran QUOTE Alan Stern said: That day will come, in this... Jul 30 2005, 04:02 PM gpurcell I wonder if a size+orbital mechanics might not be ... Jul 30 2005, 05:24 PM Alan Stern QUOTE (gpurcell @ Jul 30 2005, 05:24 PM)I won... Jul 30 2005, 07:08 PM alan interesting note: 2003 EL61 has been found on plat... Jul 30 2005, 06:02 PM dvandorn Truthfully, I think that Pluto needs to be demoted... Jul 30 2005, 06:14 PM Alan Stern I think that planets should be defined as objects ... Jul 30 2005, 07:12 PM dvandorn Aw, shoot -- and here I had in mind a concept wher... Jul 30 2005, 07:57 PM Mongo I do rather like Mike Brown's definition of a ... Jul 30 2005, 08:04 PM Alan Stern Bill--
You're back to that old location argum... Jul 30 2005, 10:25 PM Mongo QUOTE (Alan Stern @ Jul 30 2005, 10:25 PM)Thi... Jul 30 2005, 11:20 PM BruceMoomaw "In contrast, the earth has a diameter of abo... Jul 30 2005, 08:38 PM Myran QUOTE Alan Stern said: And as to Sedna and Pluto a... Jul 30 2005, 08:41 PM Jyril In my opinion, large Kuiper Belt objects (includin... Jul 30 2005, 09:43 PM BruceMoomaw Back in the 1980s, Isaac Asimov proposed that come... Jul 30 2005, 11:17 PM BruceMoomaw QUOTE (Mongo @ Jul 30 2005, 04:09 PM)It now l... Jul 30 2005, 11:25 PM Mongo QUOTE (BruceMoomaw @ Jul 30 2005, 11:25 PM)Wh... Jul 30 2005, 11:35 PM BruceMoomaw By the way, it's "2005 FY9", not ... Jul 30 2005, 11:26 PM deglr6328 Getting away from the planet/KBO/TNO debate for a ... Jul 31 2005, 03:35 AM Alan Stern These new guys are lilely to not be KB but instead... Jul 31 2005, 03:51 AM deglr6328 Cool! I will have to wait to read your paper i... Jul 31 2005, 04:22 AM BruceMoomaw In our little private "Planetary Sciences... Jul 31 2005, 05:55 AM JRehling QUOTE (BruceMoomaw @ Jul 30 2005, 10:55 PM)In... Aug 1 2005, 08:44 PM tedstryk QUOTE (JRehling @ Aug 1 2005, 08:44 PM)If I w... Aug 1 2005, 11:50 PM spaceffm For all interested in sizes i made 2 little Diagra... Aug 2 2005, 12:19 AM tedstryk It might be cool to add Ganymede, since it is the ... Aug 2 2005, 01:31 AM paxdan QUOTE (spaceffm @ Aug 2 2005, 01:19 AM)For al... Aug 2 2005, 12:03 PM ljk4-1 QUOTE (paxdan @ Aug 2 2005, 07:03 AM)Nice one... Aug 2 2005, 02:00 PM odave QUOTE (JRehling @ Aug 1 2005, 04:44 PM)If I w... Aug 2 2005, 02:23 PM JRehling QUOTE (odave @ Aug 2 2005, 07:23 AM)One thing... Aug 2 2005, 03:23 PM ljk4-1 QUOTE (JRehling @ Aug 2 2005, 10:23 AM)Honest... Aug 2 2005, 03:37 PM Jyril Like I feared, that -0.4 value was a false alarm, ... Jul 31 2005, 07:21 AM OWW In my opinion the whole planet/KBO/asteroid debate... Jul 31 2005, 09:35 AM Alan Stern Dilo--I wonder, what will you do when Mars-sized a... Jul 31 2005, 02:00 PM MiniTES QUOTE (Alan Stern @ Jul 31 2005, 02:00 PM)Loc... Jul 31 2005, 05:43 PM Alan Stern I do think Ceres is a planet: a dwarf one, but no ... Jul 31 2005, 08:07 PM DEChengst QUOTE (Alan Stern @ Jul 31 2005, 10:07 PM)Jus... Jul 31 2005, 08:40 PM DEChengst QUOTE (Alan Stern @ Jul 31 2005, 04:00 PM)Loc... Jul 31 2005, 06:25 PM alan This is how I would divide things
If it orbits a ... Jul 31 2005, 06:35 PM Alan Stern [quote=alan,Jul 31 2005, 06:35 PM]
This is how I w... Jul 31 2005, 08:11 PM dvandorn So, is Titan a planet? Is Ganymede? Is Triton?
... Jul 31 2005, 08:15 PM dilo Alan, you observed that my scheme wouldn't cor... Jul 31 2005, 10:13 PM Mongo I think that the problem we have is that the curre... Jul 31 2005, 06:42 PM Alan Stern QUOTE (Mongo @ Jul 31 2005, 06:42 PM)I think ... Jul 31 2005, 08:14 PM dvandorn If real estate doesn't matter and you classify... Jul 31 2005, 07:44 PM Alan Stern QUOTE (dvandorn @ Jul 31 2005, 07:44 PM)If re... Jul 31 2005, 08:16 PM dvandorn OK -- fair enough. Though that *is* allowing a gr... Jul 31 2005, 08:29 PM Alan Stern Other Doug-- I respectfully disagree; people I spe... Jul 31 2005, 09:19 PM abalone QUOTE (dvandorn @ Aug 1 2005, 07:29 AM)OK -- ... Aug 1 2005, 12:28 PM Mongo Just to let everybody know ... there is a new Yaho... Jul 31 2005, 10:33 PM BruceMoomaw Alan Stern: "The one comment I'll make he... Aug 1 2005, 03:31 AM abalone QUOTE (BruceMoomaw @ Aug 1 2005, 02:31 PM)Ala... Aug 1 2005, 06:23 AM Alan Stern Chonrules are spherical due to surface tension, no... Aug 1 2005, 06:40 AM abalone QUOTE (Alan Stern @ Aug 1 2005, 05:40 PM)Chon... Aug 1 2005, 07:00 AM dvandorn I've been enjoying the discussion, actually. ... Aug 1 2005, 07:37 AM abalone QUOTE (dvandorn @ Aug 1 2005, 06:37 PM) It... Aug 1 2005, 12:38 PM AndyG QUOTE (abalone @ Aug 1 2005, 12:38 PM)Classif... Aug 1 2005, 03:11 PM BruceMoomaw More news from Mike Brown via Ron Baalke in the ... Aug 1 2005, 03:33 AM Decepticon Boy would I love to see one of these up close.
Ma... Aug 1 2005, 03:42 AM Rob Pinnegar Forgetting about trans-Neptunian objects for the m... Aug 1 2005, 05:57 AM BruceMoomaw Today's MPEC ( http://cfa-www.harvard.edu/mpec... Aug 1 2005, 09:03 AM edstrick I haven't read every work exhaustively in the ... Aug 1 2005, 10:14 AM ilbasso Our taxonomic system for life went through some ma... Aug 1 2005, 04:24 PM dvandorn Don't delude yourselves, guys -- there is a fa... Aug 1 2005, 05:48 PM Rob Pinnegar QUOTE (dvandorn @ Aug 1 2005, 11:48 AM)One of... Aug 2 2005, 01:23 AM gpurcell At what mass will a body have a differentiated cor... Aug 2 2005, 01:20 AM ilbasso And don't forget Venus! (I know, and Satur... Aug 2 2005, 02:19 AM Decepticon That is a Great chart!
Very few of those on... Aug 2 2005, 03:54 AM abalone Here's something to consider
Brown argues tha... Aug 2 2005, 09:24 AM Benoît QUOTE (abalone @ Aug 2 2005, 05:24 AM)Here... Aug 2 2005, 10:05 AM abalone QUOTE (Benoît @ Aug 2 2005, 09:05 PM)There wa... Aug 2 2005, 12:12 PM Rob Pinnegar QUOTE (abalone @ Aug 2 2005, 03:24 AM)"E... Aug 2 2005, 02:30 PM JRehling QUOTE (Rob Pinnegar @ Aug 2 2005, 07:30 AM)Th... Aug 2 2005, 03:41 PM Myran QUOTE ljk4-1 said: And don't forget how active... Aug 2 2005, 02:37 PM centsworth_II Rather than embracing culture, why not embrace his... Aug 2 2005, 03:23 PM |
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