It is a dwarf planet. 136199 Eris is just a large trans-Neptunian object like 136108 Haumea, 50000 Quaoar, 134340 Pluto, 136472 Makemake, 225088 (2007 OR10), 90482 Orcus and 90377 Sedna.
It is made of rock and no gases only in the air
No, Eris is the largest of the five recognised Dwarf Planets.
Eris is thought to be a mixture of rock and ice.
Niether. Eris is classified as a dwarf planet and has more in common with comets.
It is a solid rock / ice Dwarf Planet
rocky terrestrial
it is mostly made up of rock
Eris is solid.
rock and gas because...
Jupiter is mostly made out of gas not rock.
yes, it is made out of rock because of its rings are made of rock particles
Eris is made of rock and ice.
Eris is made mostly of ice.
it is mostly made up of rock
There made of Rock and something else
hard as a rock because it is made of rock.
Eris is solid.
rock and gas because...
no
rock not gas
Rock.
It is gas
gas