ASTRO 111 quiz

ecliptic

earths plane of orbit around the sun, and annual apparent path of the sun

What causes seasons on earth

Earth’s 23.5 degree tilt affecting the intensity from the sun.

equinox

when daylight = night time, sun crosses celestial sphere

solstice

When the day/night is longest

important points of the celestial sphere

celestial pole, celestial equator, zenith and naidr

what affect does earths orbit have on the stars

stars may appear to rise and fall, or orbit polaris/central point in the sky

how does location effect what you see

depicts what falls below the horizon

What causes seasons on earth

23.5 tilt affecting the suns intensity

where sun is during solstice and equinox

Solstice: 23.5 above or below equator, equinox: above the equator

importance of axial tilt

creating seasons

order of lunar phases

new moon, waxing crescent, 1st quarter, waxing gibbous, full moon, wanning gibbous, 3rd quarter, wanning crescet

Artic circle

23.5 from the north pole

Antarctic cirlce

23.5 from the south pole

tropic of cancer

23.5 north of equator

tropic of capricorn

23.5 south of the equator

sidereal

days it takes for the moon to go around the earth 27.3

synode

days it takes for the moon to complete one cycle 29.5

solar eclipse

sun falls behind the shadow of the moon

lunar eclipse 

moon falls behind the shadow of the earth

penumbra

outter shadow of earth, light partially blocked

umbra

inner central shadow, direct light completely blocked

penumbral eclipse

when moon enters penumbra

partial eclipse

when moon partially enters umbra

total eclipse

when moon fully enters umbra

why are eclipses so rare

because the perfect alignment

why are solar eclipse so short

sun is alot larger than the moon, meaning the shadow is limited