Think this is good criteria for a planet?
915328
By your criteria, Mercury, Venus, Mars, Saturn, Jupiter, Neptune, and Uranus are not planets.\n\nMercury has no atmosphere and therefore no weather or vegetation.\nVenus has no vegetation.  It's 900 degrees on the surface!\nMars has no vegetation, no liquid, and no magnetic field.\nSaturn & Jupiter are gas giants and have no vegetation.\nNeptune and Uranus are mostly gas and do not have vegetation.\n\nThus, by your criteria, Earth is the only planet.\n\nI did not consider "internal plumbing" because the term is too vague.
797331
your planet deserves devotion:\nno one deserves pollution\n\nor\n\ndeath, catastrophe, destruction:\nnow u know about pollution
196692
I believe good. Depends on your views and plans.
1008297
Another planet, I would like to stand on the moon/mars , look at the earth, and think about how petty the issues we are currently agonizing about,  it's not like that I don't care hunger in Africa or AIDS, I just like to imagine how small our tiny little planet is, and those so called "important' issues are actually not worth a penny if you look at it through the perspective of a man living in the universe instead of planet earth.
490970
The Planet in which we all live on.
693090
Oh, you BET! I, for one, cannot wait until we discover life on other planets and have our first intergalactic (real!) Miss Universe Pageant.\n\nBut, of course, we will have to iron out all kinds of little details. For example, will we let in the Unigendres of the planet Farflungus, who can't tell if they are male or female? They have no gender honorifics like Miss or Mister, so will their customs and laws allow one of them to be called MISS Universe or will we be forced to adopt their own designation of "Mrmph" Universe, as they do?\n\nAnd what about standards of beauty? How do we codify and standardize what looks good in a swimsuit when the Orkas of Planet Pondos think that the minimum standard of pulchritude is to possess a body mass approaching that of a large, well-fed African Elephant? Or what about the Freepliks of Planet Borborygmia, who think that nothing is so pretty as a female with long flowing tentacles oozing slime from every greenish-grey pore? \n\n\nThen there is where to have the pageant, the nearest neighbor Alpha Centauri being a mere 12 light years away, and of course the music and entertainment will be up for discussion. For example, the Bork of Maladicta think music is torture and employ it on their most hardened criminals and we have to say, having heard Borkian tunes, we quite agree with them. Or what about the Yikes of Vlistipore, who believe dancing and singing are sinful and wrong, but find nuclear detonations to be quite entertaining, to the point that they've obliterated three of their solar system's own planets and are currently in the market for a fourth. (Note, these are not folks you want to rent a place to. A common hostess gift for a Yikes party is a briefcase small nuke set on "autodestruct.") \n\nAll these details need consideration. I am sure you agree it would be a worthwhile, but monumental undertaking.
885343
Well the sun doesn't become a red giant for a while so maybe we've made some friends by then and can go hang out near their home planet if it hasn't also been ruined.  It is likely that we will be much better at terraforming and travel so hoping over to a good canidate planet where we wouldn't be destroying life that already existed there shouldn't be too difficult a task.
348981
What....... planet........ are.......... you......... on?
513214
It should be habitable for another billion years unless we do something to deal with the increase in energy the sun is giving out.\n\nThe Earth should be destroyed after about 5 billion when the sun becomes a red giant (unless of course we remove some mass from the sun to make it last longer).  If it isn't destroyed by that then it'll last a very long time (not sure how long, could be until end of the universe however that happens) but it won't be very useful (except for materials).
206810
Afraid not.  The only planet in our solar system that has the temperature and atmosphere that will sustain life is good old Earth.
868314
Hi dear friend,\n\nScience is a collection of methodologies and definitions devised out on the basis of  a "common sense" approach to the world around us. Defining some thing ( a phenomenon or a group) in nature is a way man has devised to easily categorise and study the universe.  We define a bird as an organism with feathers, and hence partly many smaller raptor-dinosaurs were infact birds.Like wise, something with chlorophyll (the green pigment)was classified as a plant years ago, but eversince we discovered new animal-like organisms with chlorophyll we created new classification system and modified our definition of what a plant is. Similarly the International Astronomical Union (IAU) in 2006 August met a redefined "planets". A per this new definition a planet is a celestial body that:\n\n(1)  is in orbit around the Sun, \n(2)  has sufficient mass so that it assumes a round or 'nearly round' shape, and \n(3)  has "cleared the neighborhood" around its orbit. \nA non-satellite body in our solar system fulfilling only the first two of these criteria is classified as a "dwarf planet". Meanwhile, a non-satellite body fulfilling only the first criterion is termed a Small Solar System Body.\nPluto and its largest satellite, Charon, is now considered a "binary system". This is because they are almost of the same  size and  the "barycentre" of their orbits does not lie within either of these  bodies. Hence lets not blame anyone for deleting Pluto from the "True-Planet" list. The IAU has now classified Pluto and Charon under 'Dwarf planet'.\nHowever criticisms are still in the air:\nNASA scientist  Alan Stern, reminds us that like even planets like  Earth, Mars, Jupiter or  Neptune have not fully cleared their orbital zones . For example there are about 11987 asteroids still crossing or in Earth's path. Jupiter too is with a similar no. of huge asteroids. Infact, Pluto would have been sucked off into Neptune if Neptune had enough mass to do so..! Lets wait and see.\nCheerio!
865675
You may need to do the scale model in reverse - that is, decide on the size you want the sun to be and then make the planets accordingly.  These sites may help you.
225237
The Planet Zorg!\n\n'Beep, beep!'
906877
depends on definition of good :)
179509
you can get those wire coat hangers and put like a lot of different spherical shapes in there representing the different planets..and put each in a different hanger connecting to something in the center of like a base so that it could"orbit"
189468
erm, well...\n\nAll I can say is I'd like to visit the planet you're from ;)
1046630
I can agree with that. The earth is changing. So many will not make it through but some will. \nLove & Light\nSharon\nOne Planet = One People