Superlative and Comparative (Our Solar System)

If you want to compare between TWO things, you add er.

Giraffe is taller than cat.

Example: taller, smaller

If you want to compare between THREE things, you should add The....(est)

Example: The cat is the shortest between horse and dog.

There are some special case for certain adjective.

Example: The Jupiter is bigger than the Earth

You need to add -ger for the adjective big.