SWG
Science Working Group.
A period of rotation of a satellite about its axis that is the same as the period of its orbit ...
A synodic month is the time it takes the Moon to pass through all of the Moon phases, measured from ...
The interval between points of opposition of a superior planet.
Big movements of Earth's crust. Tectonics creates mountain ranges, deep sea trenches, volcanoes, and earthquakes that can cause destructive tsunami ...
A small, glassy material formed by the impact of a large body, usually a meteor or asteroid. Tektites are commonly ...
An instrument that uses lenses and sometimes mirrors to collect large amounts of light from distant objects and enable direct ...