Changes

: [[Noun]]: '''Luminosity'''

: [[The Sun]] is '''luminous''' because it gives off its own [[light]].

: [[The Moon]] is '''non-luminous''' because it does not give off its own [[light]]. [[The Moon]] [[reflect]]s the [[light]] from [[The Sun]].

: If one object is brighter than another, that object is said to be more '''luminous''' or have a higher '''luminosity'''.