Pluto

29.5.20

WALT: take note's quickly

in 1930 Clyde Tombough found Pluto then in 2006 the IAU changed the meaning of a planet.

1. A planet had to be round 

2.It had to orbit the sun

but Pluto didn't

3.It also had to clear its orbit.

So Pluto is not classified as a planet now it is a dwarf planet.