Io: Tier 4. Jupiter's moon. Alot of Volcanoes leaking lava over the tops.
Mercury: Tier 4. Closest planet to the sun. No atmosphere. Massive sun. Freezing at night. Hot at day.
Ariel: Uranus's moon. Tier 6. Has alot of ice. Very cold.
Titan: Saturn's Moon: Tier 5. Alot of oil. Pale orange atmosphere.
Mercury: Tier 4. Closest planet to the sun. No atmosphere. Massive sun. Freezing at night. Hot at day.
Ariel: Uranus's moon. Tier 6. Has alot of ice. Very cold.
Titan: Saturn's Moon: Tier 5. Alot of oil. Pale orange atmosphere.