PHY115: Professional Skills in Physics and Astronomy

Positional Astronomy: Session 2

Paths of the Sun Applet

The concepts of this session are included in the paths of the Sun applet, included on this page. You should use this applet to help you answer the questions in the corresponding lab sessions.

Note that the applet has three different modes.

  • continuous mode in which time moves forward in a normal fashion.
  • loop day mode; which is like continuous mode but the same day repeats continually.
  • step by day mode in which time jumps forward in 24h increments and the time of day does not change.

As a result you need to take special care to make sure you understand what is being simulated; particularly whether you are seeing the daily or yearly motion of the Sun.

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