November 01, 2011
Pluto has a Twin Sister: Frigid Dwarf Planet
Astronomers have discovered that Eris, the other significantly large object past the planets in our solar system is 27% more massive than Pluto. This once and for all nails Pluto into the dwarf planet category. They measured Eris' size by letting is pass a know star that gets covered up by Eris in the process. they then measured how long the star was covered by Eris to estimate its size. Two different telescopes in Chile both backed up the data. Now the only question that remains is why Pluto and Eris are so different seeing as they are practically the same size but not mass and reside in similar parts of the solar system.
Full article http://www.time.com/time/health/article/0,8599,2098150,00.html
Posted by jsatonik at November 1, 2011 12:45 PM