astronomy 1020-h stellar astronomy spring_2015 day-5
Post on 13-Dec-2015
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Scientist Question• Einstein - 7 • Tesla, Hawking – 3• Darwin, M. Curie – 2• Newton, Copernicus, Galileo, Beatrix
Potter, Hippocrates, Freud, Sagan, Grace Hopper, Kent Weeks, Michio Kaku, (Jimmy Neutron), and Tyler’s choice.
Course Announcements• Smartworks Chapter 1: Start on –
Grades will be downloaded sometime this weekend.
• SW-2 … hop to it.
Patterns• We use patterns in our daily lives.• Sunrise, sunset, moon rise, rainy season …• Passage of time is important to humans.• We can use the stars to help.• There are 88 constellations in the modern
sky.• Semi-rectangular, recognized by the IAU.• Northern : Latinized Greek-mythology names:
• Orion, Cygnus, Leo, Ursa Major, Canis Major
• Southern : Latin names:• Telescopium, Sextans, Pyxsis
Celestial Sphere
Image a spinning Celestial Sphere surrounding Earth in thinking about the position and motion of the sky
Celestial Sphere
Celestial Sphere Rotation
Celestial Sphere Rotation
Celestial Sphere
Star A
Star B
1
1
3
2
2
4
4
3
Figure 2
Horizon
Is the horizon shown a real physical horizon, or an imaginary plane that extends from the observer and Earth out to the stars?
Can the observer shown see an object located below the horizon?
Is there a star that is in an unobservable position?
When a star travels from being below the observer’s horizon to being above the observer’s horizon, is that star rising or setting?
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