Sources: NASA, Science, BBC News
quote: nine planets (or 10, if you count Pluto)
quote: We run commercials on the radio selling the rights to name some star in the universe after your mother for Mother’s Day. We control the naming rights on the universe as far as our eye can see, and even farther, right?
quote: ... the solar system's nine planets (or 10, if you count Pluto) devoured all but a handful of these smaller bodies.
quote: That phase of the expedition is to head towards Ceres, the solar system's only dwarf planet.
quote: NASA's first ion probe studies planetoid;
quote: the volume and mass are still not larger then the largest moons. I don't see why a mercury that formed near jupiter and a mercury that formed near the sun should be considered different.
quote: So what are those then? Solar moons?
quote: That and i think it's largely the sun responsible for taking out debris in unstable orbits around mercury
quote: i think it's largely the sun responsible for taking out debris in unstable orbits around mercury, either through gravity or just plain heat.
quote: How about we set the discussion in stone when we have a larger sample base on what
quote: It is absolutely reasonable to expect a planet to dominate the local gravity within its orbit sufficiently to swallow or capture all of the material in its orbit.
quote: The other definitions you give don't work nearly as well:
quote: Around the orange dwarf star named HD 45364 where two gas giants cross orbits? Are each of those gas giants now to be considered dwarf planets?
quote: This is still an active debate in the astrological community. I realize that it seems I often take a controversial stance to promote discussions, but I feel perfectly comfortable in this case supporting Pluto as a planet.
quote: What too about the possibility of the double planets
quote: and one’s that end up on collision courses through orbital chaos like Earth and the Mars-sized world that struck our Earth leading to the formation of the Moon? Do such worlds lose planetary status when they're on collision course but have it before that?
quote: And it's just as reasonable to dismiss this as being an important factor.
quote: All this protesting and whining on your part just because you can't adjust the part of your brain that thinks "Pluto Equals Planet". Sad.
quote: Man classifies everything and none of it starts off as right or wrong they are just labels we use but as long as it continues to follow a formula and set guidelines then they aren't just words.
quote: Say, we find a planetoid body, around the size of Pluto, or slightly smaller even, it is "rounded", it has a "rounded" moon or two, it has cleared most of its path, would that classify it as a "planet", but it is located further out than Pluto?
quote: . The anti-Pluto group
quote: As if it's a matter of bias against a ball named after a Disney character