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Spring 2008  Astr 10L  Lab 02  
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"Ever since we crawled out of that primordial slime, 
that's been our unifying cry, 'More light.'  Sunlight. 
Torchlight.  Candlelight.  Neon, incandescent lights 
that banish the darkness from our caves to illuminate 
our roads, the insides of our refrigerators.  Big 
floods for the night games at Soldiers Field. 
Little tiny flashlights for those books we read 
under the covers when we're supposed to be asleep. 
Light is more than watts and footcandles.  Light is 
metaphor.  Light is knowledge, light is life, light 
is light."
--Diane Frolov and Andrew Schneider, 
  _Northern Exposure_ (1993)



[OT-horizon.snf Starry Night(TM) file]
[OT-lightpollution.snf Starry Night(TM) file]
     (Select "Sky > Light Pollution > ...")

LAB 2: LIMITING MAGNITUDE [*.pdf]
Current events quiz [10 min]
Study guide: [1], [2]
SurveyMonkey.com pre-lab: M (3:00 PM), Tu, W, M (6:30 PM)
     (Due 12:00 PM on day of lab)
     
Apparent magnitude
Light pollution
Missing stars

In-class lab work (*.mov)
     Find and sit in your groups
     Work cooperatively as a group
     Fill out worksheets individually
     Finished?  Turn in worksheets as a group
     One worksheet is randomly selected for group grading
     
NEXT WEEK
Download and read Lab 3 worksheets ahead of time
Bring calculator to lab for credit
Read current events study guide (posted Sunday 12:00 AM)
Answer Surveymonkey.com pre-lab (posted Friday 12:00 AM)

PROJECT 1: LIGHT POLLUTION [*.pdf]
Make night observations, individually or in groups
Go to Bowen Observatory/Science Forum, _or_ NCC gravel parking lot;
     and one rural dark-sky location (provide long./lat. printout)
**WRITE UP YOUR RESULTS/CONCLUSIONS IN A LAB REPORT FORMAT**