Glossary – G
Having to do with the galaxy. A galaxy is one of billions of large systems of stars and gas, held together by gravity, that make up the universe.
A high energy photon, especially as emitted by a nucleus in a transition between two energy levels.
Geospace Electrodynamic Connections
Geostationary orbit
The surface within or around the earth that is everywhere perpendicular to the direction of gravity and coincides with mean sea level in the oceans at rest. Sea level of a moving ocean has topography, the topography that is measured by altimeter satellites to observe ocean currents.
The area of space surrounding the Earth but outside of the Earth's atmosphere - influenced by the particles and fields coming from the Sun.
Global Earth Observation System of Systems
Describes an orbit in which a satellite is always in the same position (appears stationary) with respect to the rotating Earth.
geographic information systems
Gamma-ray Large Area Space Telescope
Ground Network
Global Precipitation Measurement
global positioning system
Graduate Student Researchers Program
A great, circular motion of water in each of the major ocean basins centered on subtropical high-pressure region, with circulation clockwise in the northern hemisphere and counterclockwise in the southern hemisphere.
