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Lecture 6 Mercury
cambridge Lang
16
Astronomy
Undergraduate 1
10/25/2009

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Term
size
Definition
smallest terrestrial planet
Term
orbit
Definition
fast cause close to sun
88 earth days
Term
surface
Definition
2 sides:
boiling hot + frozen
similar to moon, no maria
+ craters with dark halos
intercrater plains
ancient lava flows
volcanism
made by contracion
Term
radar
Definition
radio waves
Term
rotation
Definition
slow cause near sun
Term
poles
Definition
highly reflective ice always in shadowed craters
Term
core
Definition
partially molten iron
relative to size, largest
Term
scarpes/rupes
Definition
Term
crater names
Definition
composers, writers, painters
Term
interior
Definition
like earth

high mass density (same as earth)
solar winds/collision? remove light mantle
Term
magneticism
Definition
mysterious
dipole magnetic field, even though mercury rotates slowly
partially molten core
magnetic coupling via connection with local external environment
Term
vulcan
Definition
planet invented to explain weird orbit, doesnt exist
Term
perihelion
Definition
planets closest point to sun
Term
inconsistent orbit
Definition
advances past predicted place
space is curved near sun (space fabric)
einstien
Term
atmosphere
Definition
barely
Term
spacecraft
Definition
Mariner 10
only one ever
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