Key Words

Terms preceded by an asterisk (*) are discussed in the Boxes.

annular eclipse

*saros

apogee

sidereal month

eclipse

solar corona

eclipse path

solar eclipse

*eclipse year

synchronous rotation

first quarter moon

synodic month

full moon

third quarter moon

line of nodes

totality (lunar eclipse)

lunar eclipse

totality (solar eclipse)

lunar phases

total lunar eclipse

new moon

total solar eclipse

partial lunar eclipse

umbra (plural umbrae)

partial solar eclipse

waning crescent moon

penumbra (plural penumbrae)

waning gibbous moon

penumbral eclipse

waxing crescent moon

perigee

waxing gibbous moon