Golden Spike Ceremony, Promontory Summit, Utah. The Golden Spike ceremony celebrating the 125th aniversery of the driving of the golden spike was held at Promontory Summit, Utah on May 10, 1994. During this celebration, 10,000 people were expected to attend.
When a satellite follows a non-circular orbit around the earth, the satellite's path is an ellipse with the center of the earth at one focus. The point of highest altitude in the elliptical orbit is called the apogee. When a satellite follows a non-circular orbit around the earth, the satellite's path is an ellipse with the center of the earth at one focus.
Wiktionary(5.00 / 1 vote)Rate this definition: pumice(Noun) A light, porous type of pyroclastic igneous rock, formed during explosive volcanic eruptions when liquid lava is ejected into the air as a froth containing masses of gas bubbles. As the lava solidifies, the bubbles are frozen into the rock.