A hypothetical moon in the "green zone" also known as the habitable zone around a distant star, there lived a gas giant about the mass of Jupiter, 314 Earth masses. The planet is blue and white partly because gas giants at the HZ (Habitable Zone) will likely have an atmosphere filled with water vapor.
On the surface of this moon, you witness a geyser in the distance, evidence of geological activity on this moon. The geological activity comes from the internal friction within the moon triggered by the gravitational tug of war between the moons and the planet. Up top there is a Mars like moon, unfortunately much like our Mars long time ago, a Texas sized sphere slammed into Mars drastically weakening it's dynamo effect causing it's magnetosphere to significantly weaken, therefor putting it's atmosphere in harms way of radiation and solar flares. The same event took place on that moon, Except the atmospheric stripping was much faster than of Mars due to it residing within the radiation belt coupled with exposure to solar flares from the star.