https://behindtheblack.com/behind-the-black/points-of-information/plutos-ice-97-nitrogen-3-methane/ Thu, 07 Oct 2010 16:53:51 +0000 hourly 1 https://wordpress.org/?v=6.9.4 https://behindtheblack.com/behind-the-black/points-of-information/plutos-ice-97-nitrogen-3-methane/#comment-2411 Thu, 07 Oct 2010 16:53:51 +0000 http://behindtheblack.com/?p=3389#comment-2411 It is important to remember that the estimated total composition of Pluto is about 75 percent rock. I don’t know if we have a comparable estimate for Eris, as it is currently near aphelion and much further away than Pluto. However, both these objects are planets, as can be seen from the fact that they are dynamic worlds with geology and weather.

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