What is a Outermost layer of the atmosphere?

Who was the seconed person to land on the moon? How much time does the moon take for one rotation? What is happening to the Earth at the moment? What woman spent 188 days in orbit aboard the space station Mir? When are tornadoes most likely to form and why? How long does the sun shine? Where and when would you expect days to be the longest? What happens after stars explode? Who did NOT set foot on the moon? Is Earth always precisely 1 AU from the sun? A typical supercluster contains no more than about 10000 stars? What are all the layers of the atmosphere and what do they do? What is Jupiter most famous of? When is Tennessee closest to the sun? What is the furtherset Earth gets from the sun? What time of year can you see Draco constellation? Why is the understanding of solar spectrum is important for designing of solar cells? Will solar energy run out? How do you classify tides? How do you say you're a star in french?