Phases of the Moon
New Moon.
Waxing Crescent.
First Quarter.
Waxing Gibbous.
Full.
Waning Gibbous.
Third Quarter.
Waning Crescent.
Moon's Impact on Tides
High tides and low tides are caused by the moon. The moon's gravitational pull
generates something called the tidal force. The tidal force causes Earth—and
its water—to bulge out on the side closest to the moon and the side farthest from
the moon. These bulges of water are high tides.
generates something called the tidal force. The tidal force causes Earth—and
its water—to bulge out on the side closest to the moon and the side farthest from
the moon. These bulges of water are high tides.
Penumbra - In pathology and anatomy the penumbra is the area surrounding
an ischemic event such as thrombotic or embolic stroke.
Immediately following the event, blood flow and therefore oxygen
transport is reduced locally, leading to hypoxia of the cells
near the location of the original insult.
an ischemic event such as thrombotic or embolic stroke.
Immediately following the event, blood flow and therefore oxygen
transport is reduced locally, leading to hypoxia of the cells
near the location of the original insult.
Umbra - The umbra Latin for "shadow" is the innermost and darkest part of a
shadow where the light source is completely blocked by the occluding body. An
observer in the umbra experiences a total eclipse. The umbra of a round body
occluding a round light source forms a right circular cone; to a viewer at the cone's
apex, the two bodies are equal in apparent size. The distance from the Moon to the
apex of its umbra is roughly equal to that between the Moon and Earth 384,402 km
238,856 mi. Since Earth's diameter is 3.70 times the Moon's, its umbra extends
correspondingly farther: roughly 1,400,000 km 870,000 m.
shadow where the light source is completely blocked by the occluding body. An
observer in the umbra experiences a total eclipse. The umbra of a round body
occluding a round light source forms a right circular cone; to a viewer at the cone's
apex, the two bodies are equal in apparent size. The distance from the Moon to the
apex of its umbra is roughly equal to that between the Moon and Earth 384,402 km
238,856 mi. Since Earth's diameter is 3.70 times the Moon's, its umbra extends
correspondingly farther: roughly 1,400,000 km 870,000 m.
Lunar Eclipse - A lunar eclipse occurs when the Moon passes directly
behind Earth and into its shadow.This can occur only when the
Sun, Earth, and Moon are exactly or very closely aligned (in syzygy),
with Earth between the other two. A lunar eclipse can occur only on the night
of a full moon. The type and length of a lunar eclipse depend on the Moon's
proximity to either node of its orbit.
behind Earth and into its shadow.This can occur only when the
Sun, Earth, and Moon are exactly or very closely aligned (in syzygy),
with Earth between the other two. A lunar eclipse can occur only on the night
of a full moon. The type and length of a lunar eclipse depend on the Moon's
proximity to either node of its orbit.
Solar Eclipse - A solar eclipse occurs when a portion of the Earth is engulfed
in a shadow cast by the Moon which fully or partially blocks sunlight.
his occurs when the Sun, Moon and Earth are aligned. Such alignment coincides
with a new moon (syzygy) indicating the Moon is closest to the ecliptic plane.
In a total eclipse, the disk of the Sun is completely obscured by the Moon.
In partial and annular eclipses, only part of the Sun is obscured.
in a shadow cast by the Moon which fully or partially blocks sunlight.
his occurs when the Sun, Moon and Earth are aligned. Such alignment coincides
with a new moon (syzygy) indicating the Moon is closest to the ecliptic plane.
In a total eclipse, the disk of the Sun is completely obscured by the Moon.
In partial and annular eclipses, only part of the Sun is obscured.
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