Why is Mae jemison confident?

Why do false ceiling keep the room warm at winter? Why it is important for steel to go through a fluid phase as it is being produced? What is the temperature of a star when it dies? What do you see during flashbacks? What was the project name that landed the first man on the moon? The moon 'waxes and 'wanes' what does it mean? What does belle Luna mean? How long does it take for a mylar balloon to decompose? What year did the spaceship challenger explode? How fast do you need to be to travel 4 light years in one hundred years? What spectral class in the sun? Why did niel armstrong go on the moon? How does space exploration impact us? Who was the first girl to go to the moon? What kinds of light come from the sun? What is the third closet planet to the sun? What are the tall puffy kinds of clouds that form by vertical motion in warm and relatively humid air? What is the fastest speed traveled in space? When do you know you are in space? How does the size of the Earth compare to the size of the Moon?