Koliko ima planeta u suncevom sistemu????

Rover · Post by **Rover** » Thu Aug 24, 2006 5:14 pm

8 odlucili naucnici da pluton nije planeta :D :D :D

Corvin · Post by **Corvin** » Thu Aug 24, 2006 6:02 pm

IAU Resolution: Definition of a Planet in the Solar System
Contemporary observations are changing our understanding of planetary systems, and it is important that our nomenclature for objects reflect our current understanding. This applies, in particular, to the designation 'planets'. The word 'planet' originally described 'wanderers' that were known only as moving lights in the sky. Recent discoveries lead us to create a new definition, which we can make using currently available scientific information.

RESOLUTION 5A
The IAU therefore resolves that "planets" and other bodies in our Solar System be defined into three distinct categories in the following way:

(1) A "planet"1 is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.

(2) A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape2 , (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.

(3) All other objects3 except satellites orbiting the Sun shall be referred to collectively as "Small Solar-System Bodies".

1The eight planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
2An IAU process will be established to assign borderline objects into either dwarf planet and other categories.
3These currently include most of the Solar System asteroids, most Trans-Neptunian Objects (TNOs), comets, and other small bodies.

IAU Resolution: Pluto

RESOLUTION 6A
The IAU further resolves:

Pluto is a "dwarf planet" by the above definition and is recognized as the prototype of a new category of trans-Neptunian objects.

http://www.iau2006.org/mirror/www.iau.o ... index.html

Corvin · Post by **Corvin** » Thu Aug 24, 2006 6:03 pm

Btw, that is what I do... ^^ Inace gledao sam taj sastanak preko neta u real timeu lolazor

Kirgan · Post by **Kirgan** » Fri Aug 25, 2006 12:12 am

Ma dijabole bre

Post by **Hypodermic** » Fri Aug 25, 2006 9:41 am

Pa po toj novoj definiciji pluton definitivno podpada pod dvarf planete kao i njegov partner charon. Zasto?

1970ih usled posmatranja Plutona otkriveno je da pluton ima jos jednu planetu pored sebe sa kojom "deli prostor" (tehnicki gledano dupla planeta). Ovo drugo nebesko telo nazvali su Charon, i otprilike je 2/3 mase plutona. Imaju zajednicku tacku rotacije (tj, nijenda planeta ne rotira samo oko svog jezgra, niti jedno telo rotira oko drugog, vec se tacka nalazi na proporcionalnoj udaljenosti od planeta u zavisnosti od mase), i zbog unikatne situacije, jedno drugome nisu sateliti.

Iskreno, fala bogu pa su se setili da uvedu tu definiciju. Bice interesantno kada budu opet morali da je menjaju :P - sta ako negde teleskopom otkriju dual gas giant? To se bas i ne moze nazvati "dwarf" planetom :D

Post by **Awakened** » Fri Aug 25, 2006 11:21 am

Opa, zivot mi se iz korena menja..

Corvin · Post by **Corvin** » Fri Aug 25, 2006 2:25 pm

Mislim da je malo nemoguce da se formira dual gas giant, bar ne oko neke zvezde

meloras · Post by **meloras** » Fri Aug 25, 2006 5:05 pm

Awakened wrote:Opa, zivot mi se iz korena menja..

Jeste mali problem ako si u srednjoj i to na casu astronomije,ali svi znaju da se na tim casovima nece mnogo nauciti...
Za ostale,bolje se vi malo bavite faxovima i ostalim skolama umesto da filozofirate o stvarima o kojima ne trebate (citaj:ne studirate astronomiju)
Ljudi koji se bave time vise od pola veka ne mogu da se dogovore oko plutona,a vama ce izgleda trebati isto toliko da zavrsite skole

Corvin · Post by **Corvin** » Fri Aug 25, 2006 5:20 pm

WTF was that? Btw, da ja studiram astronomiju i mislim da u opstu kulturu spada to da treba znati da sada ima 8 objekata u SS koje definisemo kao planete i zasto Pluton to nije

meloras · Post by **meloras** » Fri Aug 25, 2006 6:00 pm

Studiras astronomiju?Onda imas opravdanje :D :P Tebi to treba da promeni ne mali deo zivota.Govorio sam o ljudima koji samo komentarisu u prazno,kao da ce time nesto postici.A btw slazem se da je to opsta kultura ali zar nije malo kasno da se posle 76 godina (ako sam dobro izbrojao) menja opsta kultura covecanstva?

Post by **lord warrior** » Fri Aug 25, 2006 6:26 pm

Zasto bi bilo? Mnogo puta se u istoriji menjala 'opsta kultura'

A, da, nije to Pluton, vec Yuggoth 8)

Corvin · Post by **Corvin** » Fri Aug 25, 2006 6:32 pm

Menjaju se glavni gradovi, menja se i ovo, ucice deca u nizim razrediam osnovne da iam 8 planeta, prema tome jeste opsta kultura

Post by **Hypodermic** » Fri Aug 25, 2006 8:07 pm

Studiras astronomiju? wow...
Da ne ispadnem totalni kreten, ajd potvrdi (ili opovrgni) ono za plutonovog "kolegu" jer bese davno kada sam ja o tom citao. Ja astronomiju konzumiram jedino interesovanja radi - i smatram je opstom kulturom mnogo vise nego danasnju politicku scenu :P

Corvin · Post by **Corvin** » Fri Aug 25, 2006 9:20 pm

Mrzi me sad da pricam, u sustini u pravu si, sistem Pluton Haron ima centar mase van plutona, tj Pluton nije sto bi se reklo gravitaciono dominantno telo na svojoj orbiti

srebrni vitez · Post by **srebrni vitez** » Sat Aug 26, 2006 6:49 pm

Баталите астрономију, од чега ће и како силни астролози лебом да се ране. И ко је сада шта у хороскопу? :D

Post by **Hypodermic** » Sat Aug 26, 2006 9:15 pm

cek, zar se pluton uopste i koristi u astrologiji?

Corvin · Post by **Corvin** » Sat Aug 26, 2006 10:08 pm

srebrni vitez wrote:Баталите астрономију, од чега ће и како силни астролози лебом да се ране. И ко је сада шта у хороскопу? :D

Die