You should now be familiar with the names of the planets, as well as the order that they are in. A useful mnemonic is:-
|||||||||| My Very Expensive Mercedes Just Sped Under North Pier ||||||||||
The letters in bold stand for the planets from the sun outwards so we have
|||||||||||||||||||| Mercury Venus Earth Mars ------ sometimes called the inner planets ||||||||||||||||||||
||||||||||| Jupiter Saturn Uranus Neptune Pluto ------ sometimes called the outer planets |||||||||||
Now try the explorer exercise. You must navigate from Pluto to the sun in order to 'traverse' the solar system, watch your spellings, good luck ......