Physics
127

Fall 2015

 


Descriptive
Astronomy

 

Justifications for the Existence of Physics 127

Instructor's email:  cgc@byu.edu,                             Instructor's Homepage

Syllabus

Semester Schedule

Lab Schedule

 

Suggested
Observing Projects

Supplemental Helps

Glossaries:  Simple (Sky and Telescope) or
(Sea and Sky), Intermediate (Wikipedia),
Advanced (Madore [Caltech])


 Scientific Notation Tutorial,
Unit Test Keys, Homework Keys
Quiz Keys, Message Archive


Selected Figures, Tables and Images

Class Standings

Fall 2015

"Changes"

More Links of Interest
Astronomy Picture of the Day

Google Sky
Silicon Valley Astronomy Lectures
Unit Review Sheets
Sample Examination Questions

Weather Links .
On-campus weather:  ESC roof
, options
Satellite Images:
West, US Loops
Radar Images : Radar,
Local KSL Vortex
Local Forecasts:  Forecasts, Discussion

 Messages: 
   
8.  The coming winter solstice will occur at 9:48 pm MST on Monday, December 21.  However, because of an asymmetry between the shortening of the length of the daytime in the
          morning and in the afternoon, the earliest Provo sunrise of the year will occur at 5:00 pm this evening, Tuesday, December 8.  By the date of the solstice, the sunset time will already
          have become 5:04 pm, 4 minutes later!  The aforementioned asymmetry in the way the daytime lengthens has two causes, the earth's elliptical orbit and resultant variable orbital speed
          as it orbits the sun (which causes the sun's rate of motion across the sky with respect to background stars to vary) and the tilt of the earth's equatorial plane with respect to the ecliptic.
          (12/8/2015)