What layer of atmosphere did the X-15 Rocket Plane fly in?

What are the 2 moons? Predict how the information gathered by Moon missions could be helpful in the future for people wanting to establish a colony on the Moon? How long were the Apollo 11 crew in space for? What are the main differences between the inner planets? What is the distance between matar and the earth? What fraction of the moon can be seen from the moon when the moon is at its third quarter phase? What's the tallest mountain in the world? Do cumulus clouds form into cumulonimbus clouds? How did satellites evolve? What is the rarest Lego Star Wars piece? Are the brightest stars low or high magnitude? In the book sing down the moon where does tall boy get shot? Unique features of the sun? If sun is not there what happens? What are the names of all the space shuttles? Was the compass invented during the renaissance? What would you need to survie on another planet? What is at the center of the universe, according to current scientific understanding? Are the inner planets smaller then the outer planets? Who was the first black woman to travel into space aboard space shuttle endeavor?