A piece of stone or metal that travels in outer space. A part of a set that can be arranged together in different ways. The National Aeronautics and Space Administration which is in charge of all space programs for the United States. A process where atoms are joined and tremendous amounts of energy are released. The point at either end of the invisible line known as the axis.
Planets have a south pole and a north pole.
A type of energy that is made by charged particles such as electrons moving back and forth. The return of a spacecraft into Earth's atmosphere. To throw back light, heat, or sound. To move in an orbit or circle around something. An object that moves around a larger object.