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An alternative definition is that the penumbra is the region where some or all of the light source is obscured (i.e., the umbra is a subset of the penumbra). For example, NASA 's Navigation and Ancillary Information Facility defines that a body in the umbra is also within the penumbra.
Moonshadow or Moon Shadow may refer to: "Moonshadow" (song), a song by Cat Stevens "Moon Shadow", a song by English folk singer Kate Rusby from her 2005 album The Girl Who Couldn't Fly (unrelated to the Cat Stevens song) Moon Shadow, the birth name of musician and professional wrestler Goldy Locks.
Recorded by Labelle for their 1972 album, also titled Moon Shadow. A version by Liz And the Kids reached #28 in the Canadian AC charts, July 29, 1972. [16] Recorded by Mandy Moore on her 2003 cover album Coverage. Moore has also been performing "Moonshadow" on the NBC family comedy-drama This Is Us since 2017.
The Moon's Erlanger crater is an example of a permanently shadowed crater. A permanently shadowed crater is a depression on a body in the Solar System within which lies a point that is always in darkness. [1] [2] As of 2019, there are 324 known permanently shadowed regions on the Moon. [3] Such regions also exist on Mercury [4] and Ceres. [5]
Earth's shadow (or Earth shadow) is the shadow that Earth itself casts through its atmosphere and into outer space, toward the antisolar point. During the twilight period (both early dusk and late dawn ), the shadow's visible fringe – sometimes called the dark segment or twilight wedge [ 1 ] – appears as a dark and diffuse band just above ...
The term eclipse is most often used to describe either a solar eclipse, when the Moon's shadow crosses the Earth's surface, or a lunar eclipse, when the Moon moves into the Earth's shadow. However, it can also refer to such events beyond the Earth–Moon system: for example, a planet moving into the shadow cast by one of its moons, a moon ...
Since the Moon, with an angular speed with respect to the stars of 0.55 arcsec/s or 2.7 μrad/s, has a very thin atmosphere and stars have an angular diameter of at most 0.057 arcseconds or 0.28 μrad, a star that is occulted by the Moon will disappear or reappear in 0.1 seconds or less on the Moon's edge, or limb. Events that take place on the ...
A lunar eclipse is an astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. [1] Such an alignment occurs during an eclipse season, approximately every six months, during the full moon phase, when the Moon's orbital plane is closest to the plane of the Earth's orbit.