What gas makes clouds white and puffy?

What provides the centripetal force that keeps objects in orbit? What US city always lights their Christmas tree on the eclipse? On clear nights in late summer and early fall in the Shenandoah valley why does ground fog form in low areas near the Shenandoah river? What is the mass of the planet with the largest radius? What are the rays from the sun to the moon called? What layer of the atmosphere has a high altitude? What is the surface temperature of the star alpha cancri? What cones are involoved seeing the color white? What are the coordinates in degrees and hours for eridanus? What are some reasons for sending humans to the moon again? How did Neil Armstrong use the toilet on his flight to the moon and what was used as a toilet and how was it disposed? Why is color constancy important in interior design? Does Saturn have a thin or heavy atmosphere? What are the large stretches of dark sand and dust scattered over the moon surface called? Is the international space station always above the same point on Earth's surface? What explains why sun is the only star fro which earth receives much heat and light? What is the name of seven star constellation? What does your full of blue mud mean? What is planet Tamen? What stage is the star Capella in right now?