Astronomy 4
Reading Overview for Exam 2
(Winter 2017, No Sun Chapter)



Key Terms

Moon Phases and Eclipses / Cycles of the Moon
sidereal period
synodic period
umbra
penumbra
total eclipse (lunar or solar)
partial eclipse (lunar or solar)
path of totality
diamond ring effect
annular eclipse
perigee
apogee
saros cycle


Origin of the Solar System
solar system origin hypotheses:
passing star
evolutionary
catastrophic
nebular
solar nebula
angular momentum problem
extra-solar planets
terrestrial planet
Jovian planet
Galilean satellites
asteroid
comet
meteor
meteoroid
meteorite
planetesimal
accretion
protoplanet
differentiation
outgassing



Review Questions

(Some of these
may be asked as multiple-choice questions.)

Chapter 3
1) If you looked back at Earth from the moon, what phase would Earth have when the moon was full?  New?  A first-quarter moon?  A waxing crescent?  Other phases?
2) Why do solar eclipses happen only at new moon?  Why not every new moon?

 Chapter 19
3) What produced the iron in Earth’s core and the heavier elements like iodine?
4) What evidence can you cite that disks of gas and dust are common around young stars?
5) What process cleared the protoplanetary nebula away and ended planet building?