ASTR 4 - Here are the chapters to know for Test 3, in the...

This preview shows page 1 - 2 out of 5 pages.

Here are the chapters to know for Test 3, in the order that we covered them:Chapter 21 (The second part, about Mercury)Chapter 22 (Venus and Mars)Chapter 23 (Jupiter and Saturn)Chapter 21: The Moon and Mercury: Comparing Airless WorldsThe early telescopic observations of Mercury suggested that its rotation was tidally locked to theSun. How did radio astronomers (in 1962 and 1965) determine that it isn't tidally locked? Whatare the rotation period and the orbital period of Mercury, expressed in Earth days?Make sure you understand theresonancebetween Mercury's rotation and revolution periods.What does this mean for the `length of a day' on Mercury? How many Mercury years wouldelapse between two successive noons on Mercury? We probably made a sequential drawing inclass, depicting the spin-orbit resonance of Mercury - this would be a good thing to be able toredraw. (As you practice this, it will be worth comparing your notes and your practice drawingsto Figure 21-12, on p. 464.)What are the temperatures on the sun-facing (day) side and the night side of Mercury?Does Mercury have much of an atmosphere? Where does its `atmosphere' come from?What are thelobate scarpson Mercury, and what do they imply for changes in the size of theplanet (or at least its outermost layers)?What is theCaloris Basin, and why does the part of Mercury 180 degrees away from it lookweird? (Figure 21-15 will be useful here.)What makes theintercrater plainsandsmooth plainsof Mercury smooth? (Note that theMESSENGER spacecraft has recently confirmed this with high-resolution imagery.) How is thissimilar to the story of the lunar maria?What does Mercury's highdensitytell us about its interior? What part of Mercury's interior issignificantly larger than its counterpart in either the Earth or the Moon?Chapter 22: Venus and MarsHow does Venus compare to the Earth in terms of size, mass, and distance from the Sun?What is the rotation period of Venus? What does it mean that Venus's rotation isretrogradeWhat is Venus's atmosphere made of? What are its clouds made of? What are the temperatureand pressure at its surface? Would this be a good environment for Earth-like life?What is thegreenhouse effect, and how does it work? (We probably made a concept sketchabout this in class. Make sure you're clear on the roles thatvisible light, theplanet'ssurface,infrared radiation, andgreenhouse gasesplay. Note that there is a goodexplanation of the greenhouse effect back in Chap. 20, starting on p. 444.)?

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 5 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Winter
Professor
Chicanski
Tags
Astronomy, Surface

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture