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Talk:Cart'hen system: Difference between revisions
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The rereading also brings Cart'hen III into doubt. A diameter of 4378km puts that planet in the same ball park as [[wp:Callisto (moon)|Callisto]] (Jupiters' second largest moon) and [[wp:Mercury (planet)|Mercury]], both have diameters in the 4800-4900km range. Density lacks a unit of measurement, but assuming it is g/cm<sup>3</sup>, that makes it more dense than any of the [[wp:Terrestrial planet|terrestrial planets]] in our solar system (all under 5.6). Surface gravity can be calculated using other stats using a formula found at [[wp:List of Solar System objects by surface gravity|List of Solar System objects by surface gravity]]. I've not tried checking that one myself. - [[User:Salak|<font color="maroon">Lt. Salak</font>]] (Amateur Astronomer)<sup><i>[[User talk:Salak|Talk]]</i></sup> 04:21, 4 March 2008 (CST) | The rereading also brings Cart'hen III into doubt. A diameter of 4378km puts that planet in the same ball park as [[wp:Callisto (moon)|Callisto]] (Jupiters' second largest moon) and [[wp:Mercury (planet)|Mercury]], both have diameters in the 4800-4900km range. Density lacks a unit of measurement, but assuming it is g/cm<sup>3</sup>, that makes it more dense than any of the [[wp:Terrestrial planet|terrestrial planets]] in our solar system (all under 5.6). Surface gravity can be calculated using other stats using a formula found at [[wp:List of Solar System objects by surface gravity|List of Solar System objects by surface gravity]]. I've not tried checking that one myself. - [[User:Salak|<font color="maroon">Lt. Salak</font>]] (Amateur Astronomer)<sup><i>[[User talk:Salak|Talk]]</i></sup> 04:21, 4 March 2008 (CST) | ||
:Oh, and you'll be doing amazingly well to find a habitable planet around a White Dwarf. Earth like planets are only thiought possible around G type stars like our Sun, along with some F and K type stars. White Dwarfs are by definition D type. | :Oh, and you'll be doing amazingly well to find a habitable planet around a White Dwarf. Earth like planets are only thiought possible around [[wp:G V star|G type stars]] like our Sun, along with some F and K type stars. White Dwarfs are by definition [[wp:Spectral classification#White dwarf classifications|D type]]. Unless I'm very much mistaken, any planets in their [[wp:Habitable zone|Goldilocks Zone]] would have been obliterated by the Red Giant preceeding it as its boundaries should be WITHIN the former suface of the Red Giant. Also, Cart'hen III is too small to hold on to an atmosphere, thus also too small for a runaway greenhouse effect ([[wp:Venus|Venus]] style). Without that, to get those temps, it needs to be a LOT closer to its' star. For it to even exist, it would likely be a frozen wasteland, probably far closer in conditions to what Pluto is than to a Hot Desert. There would be no debris from the destroyed planets, they became part of the star, or the [[wp:Planetary nebula|Planetary Nebula]] caused by the loss of its' outer shells when shrinking to a White Dwarf - [[User:Salak|<font color="maroon">Lt. Salak</font>]]<sup><i>[[User talk:Salak|Talk]]</i></sup> 05:30, 5 March 2008 (CST) | ||