Astronomy 2 Flashcards
altitude
HEIGHT in the sky
azimuth
DIRECTION around the earth in degrees (0-360) showing N,S,W,E
eclipse
blocking out of the sun or moon
solar eclipse
- the view of the sun is blocked when the moon is directly between the sun and Earth
lunar eclipse
blocking out of the moon when the moon passes through the earth’s shadow
total lunar eclipse
total blocking out of the moon when the moon passes through the UMBRA of the Earth’s shadow
moon
a natural satellite of a planet
Lunar
refers to moon
perigee
point of the moon’s orbit closest to earth
apogee
point of the moon’s obit farthest from Earth
Lunar phases
The apparent change in the shape of the Moon due to how much of the sunlit side is facing the Earth.
waxing
lighted area grows larger
waning
lighted area grows smaller
crescent
less than ½ of the lighted side of the moon is visible
quarter
½ of the lighted side of moon is visible
new moon
moon is not visible in the sky (moon is between Earth & Sun)
waxing crescent
phase between the new moon and one-half moon when the lighted area of the moon appears to grow larger( moon has traveled ¼ around Earth)
waxing Gibbous
phase between one-half and full when the lighted area of the moon appears to grow larger
full moon
the lighted side of the moon is fully visible (Earth is between the moon & Sun)
solar energy
energy from sun
tide
- rise and fall of the oceans caused by the moon’s gravitational pull on Earth
high tide
there are two types- there are 2 high tides every 24 hours
direct tide
- an ocean bulge on the side of Earth facing the moon
opposite tide
an ocean bulge on the side of Earth opposite from the moon
low tides
occur during high tides in locations between the two high tides- 2 per 24 hours
spring tide
when the moon is at full and new moon phases the high tides are higher caused by the sun and moon lining up with the earth. Sun’s gravity on the earth causes the ocean bulges to become larger.
neap tides
during its first and third quarter phases the moon’s gravitational pull is partially canceled out by the sun’s gravitational pull resulting in lower high tides than normal.
