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Astronomy
The scientific study of planets, stars, black holes, comets and other celestial bodies that make up outer space.
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Astronomy > Moon 
waxing Moon
Astronomy; Moon
The period of the Moon's monthly cycle as it moves from a new Moon to a full Moon, increasing in visibility with respect to an Earth-bound observer.
young crescent Moon
Astronomy; Moon
Term used to denote the initially visible crescent of the Moon immediately after the new Moon.
angular diameter
Astronomy; Moon
The diameter of a distant object as measured by the angle formed from a point representing an observer and the outer edges of the object.
visual diameter
Astronomy; Moon
The diameter of a distant object as measured by the angle formed from a point representing an observer and the outer edges of the object.
annular eclipse
Astronomy; Moon
An solar eclipse where the Moon is between the Sun and the Earth, but with the Moon appearing smaller than the Sun to the observer, leaving a bright ring around the circumference ...
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