Question

1. earth is found in a region of space called the
2. what are the planets called that are mostly made of gas?

Explanation:

These are the outer planets in our solar system, composed mainly of hydrogen, helium, and other gaseous compounds with no solid surface.

Answer:

Gas giants (or Jovian planets; specific examples are Jupiter, Saturn, Uranus, and Neptune, though Uranus and Neptune are sometimes called ice giants due to their icy components alongside gases)