Simply because it's too far away! Missions to explore space that were launched decades ago still haven't reached the edge of the known solar system yet (i.e. Pluto).
Pluto the dwarf planet is an example of of a dwarf planet.
The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.
a dwarf planetAcording to NASA Pluto is a dwarf planet.
Pluto was declared as dwarf planet in 2006
No. It was categorised as a dwarf planet in 2006, but not all astronomers agree with that decision.
Pluto the dwarf planet is an example of of a dwarf planet.
The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.
a dwarf planetAcording to NASA Pluto is a dwarf planet.
Pluto, it is now a dwarf planet or planetoid.
Pluto Became a Dwarf Planet in 2007.
Pluto was declared as dwarf planet in 2006
Pluto is not a planet its a dwarf planet
No. It was categorised as a dwarf planet in 2006, but not all astronomers agree with that decision.
Pluto is a dwarf planet
dwarf planet Pluto
As of 2006, Pluto has been classified as a dwarf planet.
No. Pluto is a rocky/icy dwarf planet. In fact, no dwarf planets are gaseous.