Apogee - The point farthest from the earth in the orbit of the moon or a satellite.
Eccentricity - Not situated in the center or having the axis away from the center.
Irridium - Iridium is the chemical element with atomic number 77, and is represented by the symbol Ir. A very hard, brittle, silvery-white transition metal.
Moraine - a deposit of material such as boulders, grave, and sand left by a glacier.
Perigee - a artificial satellite nearest to earth or point in the orbit of the earth.
