~Hello there! ^_^
Your question: This large peninsula country is mostly a desert in Asia..?
Your answer: Saudia Arabia is the country that is mostly a desert in Asia. It is the largest country on the largest peninsula in the world.
Happy Studying!
Explanation:
astronomers use telescopes to see objects at wavelengths all across the electromagnetic spectrum.
these are extremely hot objects that emits x-ray and even gamma Ray's