AST 101 Chapter 1 Cycles of the Sky – Astronomy Study Guide & Notes

AST/./101:/./Chapter/./1/./Cycles/./Of/./The/./S
k
1. Why/./is/./the/./new/./moon/./more/./difficult/./to/./see/./from/./Earth/./than/./the/./full/./moon?:/./It/./rises/./at/
./the/./same/./time/./as/./The/./Sun




The/./illuminated/./Hemisphere/./of/./the/./moon/./is/./facing/./completely/./away/./from/./us
2. An/.// . / / . / is/./a/./grouping/./of/./stars/./that/./represents/./a/./story/./or/./symbol/./of/./consequence/./to/./
a/./culture/./and/./can/./be/./handy/./for/./locating/./objects/./on/./the/./celestial/./sphere.:/./Con-stellation
3. The/./sun/./rises/./due/./east/./and/./sets/./due/./west/.// . / / . / / . / / . / .:/./Only/./on/./an/./equinox
4. Match/./"Equinox"/./and/./"solstice"/./to/./their/./descriptions.:

5. The/./figure/./shows/./the/./arrangement/./of/./the/./Earth,/./Sun,/./and/./Moon for/./a/./ .-
:/./Lunar/./Eclipse
6. Select/./all/./the/./reasons/./why/./we/./don't/./have/./eclipses/./every/./month:/./The/./moon/./may/./pass/./ab
ove/./or/./below/./the/./Earth's/./shadow.

The/./Earth/./ and/./the/./ Moon/./ have/./orbits/./ that/./ are/./ tilted/./ compared/./ to/./ each/./ other.

The/./Moon's/./orbit/./is/./tilted/./5/./degrees/./from/./the/./ecliptic.
7. The/./celestial/./sphere/./describes/./the/./position/./of/./stars/./in/./a/./way/./which/./makes/./t
he/./Universe/./easier/./to/./comprehend././This/./is/./a/./good/./example/./of/./scientific
.:/./Scientific/./Model
8. The/./Earth/./both/./evolves/./and/./rotates././Match/./the/./terms/./to/./their/./d/ . /efinitions.:
9. The/./Earth's/./tilt/./is/./responsible/./for/./which/./of/./the/./following?:/./The/./Sun/./appears/./to/./move/./nort
h/./and/./south/./on/./the/./celestial/./sphere/./(changes/./declination)/./over/./a/./year.

The/ . / North/ . / Pole/ . / experiences/ . / daylight/ . / for/ . / six/ . / months.
10. Order/./the/./events/./by/./the/./length/./of/./time/./each/./takes,/./with/./the/./longest/./at/./the/./to
p/./and/./the/./shortest/./at/./the/./bottom.:/./1././The/./Earth/./orbits/./the/./Sun/./once.

2. The/./Moon/./Orbits/./the/./Earth/./one/./time.

3. The/./Earth/./rotates/./once.

, AST/./101:/./Chapter/./1/./Cycles/./Of/./The/./S
ky

4. The/./Sun/./rises/./and/./later/./sets.
11. The/./light/./we/./see/./from/./phases/./of/./the/./Moon/./comes/./from/./
.:/./Sunlight/./reflected/./by/./the/./Moon
12. Select/./all/./of/./the/./statements/./about/./the/./seasons/./that/./are/./correct.:/./The/./Sun/./warms/./the/./g
round/./more/./directly/./in/./the/./summer.

There/./are/./more/./daylight/./hours/./in/./the/./summer/./than/./in/./winter.
13. The/./Sun/./appears/./to/./move/./along/./the/./celestial/./sphere/./on/./a/./line/./called/./the
.:/ . / Ecliptic
14. One/./day/./on/./Earth/./is/./the/./time/./it/./takes/./for:/./The/./Earth/./to/./rotate/./once
15. Order/./the/./events/./by/./the/./length/./of/./time/./each/./takes,/./with/./the/./longest/./at/./the/./to
p/./and/./the/./shortest/./at/./the/./bottom.:/./1././The/./Earth/./orbits/./the/./Sun/./once.

2. The/./Sun/./Moves/./through/./one/./constellation.

3. The/./Earth/./rotates/./once

4. The/./Sun/./rises/./and/./later/./sets
16. Which/./celestial/./objects/./rise/./in/./the/./east/./and/./set/./in/./the/./west/./as/./seen/./from/./
Earth?/./(Select/./all/./that/./apply):/./Stars/./near/./the/./celestial/./equator

Jupiter/./Th

e/./Moon/./Th

e/./Sun
17. Which/./of/./the/./following/./is/./responsible/./for/./the/./Earth's/./seasons?:/./The/./Earth's/./rotation/./axi
s/./is/./tilted/./compared/./to/./its/./orbit.
18. Arrange/./the/./times/./of/./year/./based/./on/./the/./position/./of/./sunset,/./from/./farthest/./nor
th/./(top)/./to/./farthest/./south/./(bottom).:/./1././Summer/./solstice

2. A/./ week/./ before/./ the/./ autumnal/./ equinox