Which process is responsible for the greatest loss of energy from earths surface into space on a clear night?

Why does the Aztec calendar end at 2012? Facts about the spectroscope? How many astronauts who landed on the moon were Boy Scouts? Who was the first person to travel to outer space? What color of the rainbow reflects the most light? Why is the moon non-luminous even though it gives off light? Who was the first male to fly the space shuttle? What is another name for Rigel? What is the main cause of an aurora? What is another name used for the Big Dipper? Why is the center of a galaxy so bright? How does energy produce in the core of the sun reach the surface? What NASA vehicles have taken video on the planet Mars? Why is the space shuttle important to space exploration? Who opens the east gate for the god Apollo to drive through? What is the distance between Jupiter and earth in AU numbers and kilometers? Explain why it is difficult to include water vapor in a graph that shows the percentages of various gases in the atmosphere? When was First microscope was invented? What clouds consist of many tiny ice crystals and are sometimes called mare's tale? What each shuttle mission has as a specially trained of astrounauts?