32 terms

Chapter 3 - Eclipses and the Motion of the Moon

From Chapter Three of Universe (9th Ed.) PHSC - 11900 Stellar Astronomy and Astrophysics.
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Annular Eclipse
An eclipse of the sun in which the Moon is too distant to cover the Sun completely, so that a ring of sunlight is seen around the moon at mid-eclipse.
Apogee
The point in its orbit where a satellite or the moon is farthest from the Earth.
Eclipse
The cutting off of part or all the light from one celestial object by another.
Eclipse Path
The track of the tip of the Moon's shadow along Earth's surface during a total or annular solar eclipse.
Eclipse Year
The interval between successive passages of the Sun through the same node of the Moon's orbit.
First Quarter Moon
The phase of the Moon that occurs when the Moon is 90° east of the sun.
Full Moon
A phase of the Moon during which its full daylight hemisphere can be seen from Earth.
Line of Nodes
The line where the plane of Earth's orbit intersects the plane of the Moon's orbit.
Lunar Eclipse
An eclipse of the Moon by the earth; a passage of the moon through the Earth's shadow.
Lunar Phases
The appearances of the illuminated areas of the moon as seen from earth.
New Moon
The phase of the Moon when the dark hemisphere of the Moon faces Earth.
Partial Lunar Eclipse
A lunar eclipse in which the moon does not appear completely covered.
Partial Solar Eclipse
A solar eclipse in which the Sun does not appear completely covered.
Penumbra
A lunar eclipse in which the Moon passes only through Earth's penumbra.
Penumbral Eclipse
A lunar eclipse in which the Moon passes only through Earth's penumbra.
Perigee
The point in its orbit where a satellite or the moon is closest to the earth.
Saros
A particular cycle of similar eclipses that recur about every 18 years.
Sidereal Month
The period of the Moon's revolution about the Earth with respect to the stars.
Solar Corona
Hot, faintly glowing gases seen around the sun during a total solar eclipse; the uppermost regions of the solar atmosphere.
Solar Eclipse
An eclipse of the Sun by the moon; a passage of Earth through the moon's shadow.
Synchronous Rotation
The rotation of a body with a period equal to its orbital period; also called 1-to-1 spin orbit coupling.
Synodic Month
The period of a revolution of the Moon with respect to the Sun; the The length of one cycle of lunar phases. Also called the lunar month.
Third Quarter Moon
The phase of the Moon that occurs when the moon is 90° west of the Sun.
Totality
(lunar eclipse) The period during a total lunar eclipse when the Moon is entirely within the Earth's umbra.
Totality
(solar eclipse) The period during a total solar eclipse when the disk of the Sun is completely hidden.
Total Lunar Eclipse
A lunar eclipse during which the Moon is completely immersed in Earth's umbra.
Total Solar Eclipse
A solar eclipse during which the Sun is completely hidden by the moon.
Umbra
The central, completely dark portion of a shadow.
Waning Crescent Moon
The phase of the moon that occurs between third quarter and new moon.
Waning Gibbous Moon
The phase of the Moon that occurs between the full moon and the third quarter.
Waxing Crescent Moon
The phase of the moon that occurs between new moon an the first quarter.
Waxing Gibbous Moon
The phase of the moon that occurs between the first quarter an full moon.