Respuesta :
Planet X is closer to the sun, most likely has life on it. Planet Y is a smaller one farthest away from sun and has very little light leaving it a baron waist land.
Answer:
Planet X is closer to the sun then Planet Y, which makes it a dwarf planet. Planet Y is also too small to be an ACTUAL planet.
Explanation:
I know this answer because I remember how Pluto became a dwarf planet, because it was to small, was far away, and had a weird orbit. You're welcome!
-Dub