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Penumbra

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Penumbra
Related Category: Astronomy: General
(pnm´br): see eclipse; sunspots.
More on Penumbra
Eclipse - (klps´, -) [Gr.,=failing], in astronomy, partial or total obscuring of one celestial body by the shadow of another.


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Definition: penumbra: Literally, "dim light"; the outer filamentary region of a sunspot.
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- faint outer shadow. l lunar eclipses occur when the Moon passes through the l shadow but are very difficult to observer so are of internest mainly to astonomers.

penumbra Portion of the shadow cast by an eclipsing object in which the eclipse is seen as partial.
perihelion The closest approach to the Sun of any object in orbit about it.

: the area of partial shadow surrounding the central umbra. It is due to the finite angular size of the sun. An observer standing in the would observe only part of the sun's disk.

penumbra -- the part of a shadow (as of the Moon) within which the source of light (the Sun) is only partially blocked out.
perigee -- the point in the orbit of the Moon that is closest to the Earth.

: A dark region that surrounds an even darker central area of a sunspot.
photosphere: The visible portion of the Sun.

Penumbra: The brighter area that surrounds the darker umbra or umbrae at the center of a sunspot. (go to first use in the text) ...

. The sunspot area that may surround the darker umbra or umbrae. It consists of linear bright and dark elements radial from the sunspot umbra.

Penumbra
(a) Less than full shadow (umbra).
(b) The portion of a shadow in which light from an extended source is partially but not completely cut off by an intervening body; the area of partial shadow surrounding the umbra.
Percolation ...


Shadowed area in an eclipse where only part of the light source is blocked. Observers in the l shadow of a solar eclipse see a partial eclipse.

Penumbra Literally "next to the umbra". (i) The shadow that results when only part of the bright object is occulted; e.g. an observer will see a partial eclipse when he is in the penumbra of the shadow of the moon.

- the outer part of an eclipse shadow; also, the lighter area surrounding the center of a sunspot
Perihelion- a planet or comet's closest approach to the sun
Periodic time- (see sidereal period) ...

penumbra
The portion of a shadow in which only part of the light source is covered by an opaque body.
penumbral lunar eclipse
A lunar eclipse in which the Moon passes only through the Earth's penumbra.


The outer portion of the shadow during an eclipse. A partial eclipse will occur as the eclipsed object is not completely covered. The also refers to the outer region of a sunspot.

Penumbra
A Partial blocking of the Sun by the Earth creates an Penumbra Shadow. The Sunlight is dimmed but not extinguished.
Penumbra Eclipse ...


the area of partial illumination surrounding the darkest part of a shadow caused by an eclipse.
Periapsis
the point in the orbit closest to the planet.

Penumbra. (1). The lighter part of a sunspot. (2). The area of partial shadow either side of the main umbra cone of shadow cast by the Earth.
Perigee. The position of the Moon in its orbit when it is closest to the Earth.

: The portion of a shadow that is only partially shaded.
l eclipse: A lunar eclipse in which the moon enters the of Earth's shadow but does not reach the umbra.

Penumbra - The outer part of the shadow of a body where sunlight is partially blocked by the body
Perihelion - The point in the orbit of a body when it is closest to the Sun ...

- l Eclipse. Observers in western North America can see the Moon pass partly through the edge of Earth's shadow on Feb. 9. The northern part of the Moon will appear darkest.
The Planets ...

Penumbra
Part of the largest sunspot in Active Region 10030 recorded on 15 July 2002 with the Swedish 1-m Solar Telescope on La Palma.

:
The is the outer, relatively light region of a sun spot. It is shaped like an annulus (a ring) surrounding the darker, cooler umbra.

PENUMBRA
The penumbra is the outer, relatively light region of a shaped like an annulus (ring) surrounding the darker, cooler .
The penumbra is the area of partial shadow (compare to ).


The is the area of partial shadow (compare to umbra).

penumbra
the region of a shadow from which part of the light source remains visible
perigee ...

- (n.)
(a.) For an eclipse, the part of the shadow from which the sun or other radiating body is only partially occulted; (b) of a sunspot, the outer region of the sunspot, not as dark as the central umbra.

penumbra
The sunspot area that may surround the darker umbra or umbrae. In its mature form it consists of linear bright and dark elements radial from the sunspot umbra.
perigee ...

A l eclipse occurs when the Moon passes through the Earthšs . The causes a subtle darkening of the Moon's surface.

A penumbral eclipse of the Moon. [H76]
Apsidal Motion
Rotation of the line of apsides in the plane of the orbit; (in a binary) precession of the line of apsides due to mutual tidal distortion. [H76]
Apsides, Line of ...

The l eclipse ends.
Partial Solar Eclipse : 1 August
WARNING! Never look at the Sun with the naked eye! ...

Last Penumbral
March 29, 2526
All Saros Series follow this progression.

Last l
(northern edge of shadow)
As described above, the Saros cycle is based on the recognition that 223 synodic months is to a good approximation equal to 242 draconic months and 239 anomalistic months.

When just the Penumbra shadow touches Earth, it is a partial eclipse of the sun in that place. Only part of the sun is blocked.

See umbra. l eclipse See lunar eclipse, note. Per, Pers International Astronomical Union abbreviations for Perseus. See constellation.

penumbra portion of the shadow from which part of the light source is excluded when a body passes over the light source.

region of partial shadow that is outside the umbra; the light source is partially blocked.

penumbra literally, "dim light"; the outer filamentary region of a sunspot. perihelion the point in its orbit where a planet is closest to the Sun.

A complex magnetic configuration of a solar sunspot group consisting of opposite polarity UMBRAe within the same . Gamma.

See also: See also: Earth, Solar, Sun, Astro, Umbra

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