gibbous moon
More than half-lit
A gibbous moon is more than half illuminated but not yet full—the phase between half moon and full moon.
The term applies to both waxing gibbous (growing toward full) and waning gibbous (shrinking after full).
Gibbous comes from a Latin word meaning humpbacked, describing the moon's bulging shape during this phase.
Curved sickle-like arc
- quarterOne of four parts
- lunationMoon's orbital period
- lunar cycleMoon's orbital period
- phasesDistinct periods in sequence
first quarter · third quarter · illumination · terminator · earthshine · lunar phase · bulging
Scientific study of the moon
- syzygyTrilinear celestial arrangement
- apogeeHighest orbital point
- perigeeOrbit's closest point
- librationApparent rocking motion
elliptical orbit · lunar orbit · ecliptic · astronomer · telescope · observatory · ephemeris · apsidal precession
Timekeeping by moon phases
- tidesPeriodic sea-level changes
- Islamic calendarMuslim lunar year system
- Hebrew calendarLunisolar system tracking Jewish observances
- Mid-Autumn FestivalChinese harvest moon celebration
Darkness above after sunset
- stargazingObserving celestial bodies
- skygazingWatching celestial bodies overhead
- twilightLight after sunset
- duskDimming after sundown
evening · nocturnal · naked eye · binoculars · astrophotography · moonwatching · clear skies · horizon
Female adult equine
- cratersImpact-formed depressions
- highlandsElevated, hilly land areas
- regolithFragmented covering over bedrock
- lunar surfaceThe moon's exterior terrain
Tycho · Copernicus · Sea of Tranquility · basin · rille
crescent
Curved sickle-like arc
- quarterOne of four parts
- lunationMoon's orbital period
- lunar cycleMoon's orbital period
phases · first quarter · third quarter · illumination · terminator · earthshine · lunar phase · bulging
selenology
Scientific study of the moon
libration · elliptical orbit · lunar orbit · ecliptic · astronomer · telescope · observatory · ephemeris · apsidal precession · sidereal month
lunar calendar
Timekeeping by moon phases
- tidesPeriodic sea-level changes
- Islamic calendarMuslim lunar year system
- Hebrew calendarLunisolar system tracking Jewish observances
night sky
Darkness above after sunset
- stargazingObserving celestial bodies
- skygazingWatching celestial bodies overhead
- twilightLight after sunset
dusk · evening · nocturnal · naked eye · binoculars · astrophotography · moonwatching · clear skies · horizon · moonrise
mare
Female adult equine
- cratersImpact-formed depressions
- highlandsElevated, hilly land areas
- regolithFragmented covering over bedrock
lunar surface · Tycho · Copernicus · Sea of Tranquility · basin · rille
- moonlunar, luna, moonrise, moonset, crescent
- lunar cycleswaxing crescent, lunar cycle, first quarter, last quarter, waning crescent
- sky and timesun, stars, planets, comet, eclipse
- Moon Lorelunar cycle, Luna, Selene, Artemis, Diana
- celestial eventssolar eclipse, lunar eclipse, meteor shower, eclipse, supernova
gibbous mooncrescent moon
Partially illuminated lunar phase
waxing crescent · waning crescent · new moon · young moon · old moon
moon, moonlight, moons, moonshine, moonlit, mooning, moonbeam, moonless, moonstone