Astronomy and Cosmology week 2 Tuesday

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Astronomy and Cosmologyweek 2 - Tuesday

• Star Date
• Short lecture on Ch.1-2
• Questions?
• Your Web-X posts
• Thursday assignments
• Solar motion workshop predictions assemble
  tools
• Break
• Celestial Navigation

2
Review from week 1

• Scientific notation
• Distance measurements ly 1016 m
• Angle measurements moon ½ degree 30
• Scales

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Introduction to Space and Time

• Naked eye astronomy
• Constellations
• Time Sky changes (Starry Night)
• Through the day, due to Earths rotation
• Through the year, due to Earths orbit
• Through the seasons, due to Earths tilt
• Through the epochs, due to precession
• Space
• celestial sphere
• Equinoxes, solstices

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Naked eye astronomy
What you see depends on where you are, in space,
time and culture.
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Constellations help orient us
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Time Sky changes (Starry Night)

• Through the day, due to Earths rotation
• Through the year, due to Earths orbit
• Through the seasons, due to Earths tilt
• Through the epochs, due to precession

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Sky changes through the day, due to Earths
rotation
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Sky changes through the year, due to Earths orbit
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Sky changes through the seasons, due to Earths
tilt
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Sky changes through the epochs, due to precession
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Celestial sphere
Altitude from horizon Declination from equator
(latitude) Azimuth from North RA from VE
(longitude)
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Equinoxes and solstices
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Questions? Post to WebX
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Thursday assignments Library workshops
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Moon workshop Thursday

• Do predictions before class
• Print out fresh copy of whole workshop

16
Sun workshop with Cel Nav

• Hand in predictions
• Start assembling tools

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Celestial Navigation

• Discuss Space/time workshop from last week
• Key points
• Measuring space and time angles and hours
• Questions?
• Solar motion workshop this week and next
• Hand in predictions (with your name)
• Assemble Solar Motion Demonstrators
• Answer workshop questions with new tools