person who studies the relationship between matter, energy, motion, and force outside the Earth's atmosphere.
unmanned aircraft that can be guided remotely.
association of European nations promoting free trade, ease of transportation, and cultural and political links.
person who works to control and put out fires.
orbit that moves at the same speed as the Earth's rotation.
process of creating, processing, storing, and displaying images made from infrared radiation, which has wavelengths longer than visible light but shorter than microwaves.
substance capable of reducing the speed of a reaction.
a study or analysis of characteristics of an area or a population.
uncontrolled fire that happens in a rural or sparsely populated area.