# Study Guide for 1ST Astronomy Exam by CVGHpO

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```									                                      Study Guide for 2ND Astronomy Exam
The successful student will be able to…

Unit 10: Geometry of the Earth Sun and Moon
 Use the angular size relation to estimate the distance or true size of an astronomical object form a photograph.
Unit 11: Planets the Wandering Stars
 Describe the characteristics of the inferior and superior planets as regards their apparent motion in the sky. (Motion,
 Work with and identify planetary configurations of opposition, conjunction, quadrature and maximum elongation.
o Practice with the Planetary Configuration Simulator
 Present the basic ideas of the Aristotelian model of the Universe.
o Types of matter
o Location and Motion of the Earth
o Location of the planets and the observational basis for that ordering (See Figure 11.4)
 Describe the basic ideas of the Copernican model of the Universe.
o Location and Motion of the Earth
o Location of the planets and the observational basis for that ordering. (See Figure 11.10)
 Describe the cause of retrograde motion in our modern Copernican Model.
 Describe why inferior planets demonstrate a maximum elongation in their motion.
Unit 12: The beginnings of modern astronomy
 Discuss Galileo’s observations of the Sun. Moon, Jupiter and Venus and state how they contradicted the previously held
Aristotelian model of the Universe
Unit 16: The Universal Law of Gravitation
 Describe the characteristics of gravity in words and in an equation. (16.2)
 State the significance of the low value for G.
Unit 32: The Structure of the Solar System
 Write an essay contrasting the properties of the Terrestrial and Jovian Planets
 Calculate the density of a planet given its radius and mass
 List or identify the following characteristic of any planet in our solar system
o Distance from the Sun in AU
o Mass in Earth masses
o Density in g/cm3
Unit 33: The Origin of the Solar System
 Describe the three basic ingredients of the “cosmic cupboard” and how these three ingredients and the thermal structure of
the solar nebula create the distribution of planets that we see in our solar system.
 Describe the steps in the formation of solar system (33.2 to 33.5)
1. Interstellar cloud collapses to a disk
2. Solid grains of rock and ice coalesce to form planetesimals
o Within the “ice line” only rocky planetesimals form
o Beyond the “ice line” planetesimals are composed mostly of ices.
3. Planet growth continues by the gravitational attraction of planetesimals to each other.
4. Final stage of planet growth is a late-stage heavy bombardment.
o When the Sun “turned on” t-Tauri winds cleaned out the solar system of loose gas and dust
terminating the planet formation process.
Unit 34: Other Planetary Systems
 Describe why observing exoplanets is directly is extremely difficult.
 Describe how the Doppler Detection Method is used to determine the orbital period, orbital radius, and minimum mass of a
planet around a distant star.
 Characterize the typical extra-solar planet and state why it is unexpected according to the Solar Nebula Theory
 Describe planet migration and its impact on potential terrestrial planets.
Plus…
o Use ratios to compare sizes of astronomical objects
o Use the t=d/v relation to determine the time required for light to travel between two objects
o Use a proportion to calculate a scale model of an astronomical object

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