Convection created by the difference in density between two or more fluids in a gravitational field. A graph of the number of bursts observed at each brightness level. One of the four experiments on the Compton Gamma Ray Observatory . Unit of energy equal to that attained by an electron falling unimpeded through a potential difference of one volt. ESA European Space Agency.
Some solids can also exhibit fluid behavior over time.
Falling in a gravitational field where the acceleration is the same as that due to gravity alone. The acceleration Earth's gravitational field exerts on objects at Earth's surface. The Milky Way galaxy is a spiral galaxy - very flat with a bulging core. Galactic coordinates are expressed in galactic latitude and galactic longitude. From Earth, the center of the galaxy is in the constellation Sagittarius.