Astronomy Flashcards
We send satellites and space stations into orbit to study electromagnetic waves to
avoid earths turbulence
Rotation
day
revolution
year
the earth’s axis is tilted
23.5 this tilt causes seasons
Winter solstice: Date, pointed, directly overhead at, longest ___ of the year
dec 21st, away from the sun, equator capricorn, night
summer solstice: Date, pointed, directly overhead at, longest ___ of the year
June 21st, towards the sun, cancer, day
vernal equinox: date, season, sun is direct overhead at, days are
march 21st, spring, equator, greater
Autumnal equinox: date, season, sun is direct overhead at, days are
sep 21st, fall, equator, less
zenith
sun is exactly 90° overhead, only occurs between 0-23.5 N&S
no wind, no flowing water, so no erosion is caused by
Moon’s lack of atmosphere
Commonly-accepted theory of Moon’s formation
Simultaneous Theory (Formed when the earth formed)
Waxing is _____ Waning is____
Right, Left
The sun is responsible for which tides
spring and neap tides
When moon and sun are aligned that creates the
spring tides, when moon is new and full
When moon and sun are perpendicular this creates
neap tides, occurs during first and third quarters
Umbra
part that is completely shaded
penumbra
shadow of the shaded part
sun and earth is aprox.
93 miles away
Original theory was the Geocentric Model where
the Earth was the center and everything revolved around it
Copernicus came up with
Heliocentric Model where the sun was in the center
All stars form from
interstellar cloud ours is the nebula
Aphelion
farthest away
Perihelion
closest
Terrestial planets have
a rocky surface, few moons, relatively similar size to earth
