What are the differences between thermosphere and mesosphere?

What is David saint Jacques contribution to space exploration? Do the astronauts control the space shuttle? What was the first constellation discovered? How much does a space shuttle weigh in kg? Which planet came first in the formation of our solar system? How star topology works? Why are there colors in blue sky? What would happen if you dropped a hammer and a feather here on earth? What wheel do you use on a microscope to make the image clearer? What problem did john glenn encounter on his flight back to earth? What were the names of the three astrounasuts on the Apollo thirteen mission? Disadvantages of the Hubble telescope? How do you know if the second generation of the third era made it out alive from the catastophic event from the solor nebula that coverd the eath in a mass collision? When was Einstein born? What are the importance of constellation in astronomers? Can spotting last for 5 days? What are the odds of September 7 falling on Tuesday? What things give us light and heat? Zeus wife name? What kind of accomplishment was it for Katherine and the workers of Langley for the Eagle to land safely during the Apollo mission on the surface of the moon Writing?