Question of the Day

Outer Worlds II - Recently & Currently Active Worlds

Recently Active Worlds - Ganymede & Co.

• How are their surfaces similar/different from the Moon's?

• Why are outer worlds geologically active longer than similarly sized inner worlds

Titan

• What is the physical and chemical composition of Titan's atmosphere?

• Why is Titan's secondary atmosphere different from the secondary atmospheres of the inner worlds?

• Why must Titan's atmosphere be constantly replenished?