How Soon After Sunset Does the Sky Become Dark? *
AbstractHere's an astronomy project idea from Dr. James Pierce, a professor in the Astronomy Program at Minnesota State University, Mankato: "Determine the length of twilight at different times of the year by observing the time at which certain bright stars first appear and comparing with the sunset time. Beware of variations due to stars appearing at different altitudes. Try using Polaris as a standard. Also note the time at which automatic streetlights turn on. Determine how soon after sunset stars of different magnitude (brightness) appear." (Pierce, 2004) A good book for learning to locate stars of different brightness for this project is The Stars: A New Way to See Them, by H. A. Rey (Rey, 1966) (available at Amazon.com).
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Last edit date: 2017-07-28
- Pierce, J., 2004. "Ideas for Astronomy Science Fair Projects," Astronomy Program, Minnesota State University, Mankato [accessed December 01, 2011] https://mavdisk.mnsu.edu/wp5884kt/scifair.html.
- A great book for learning the constellations is (and yes, this is the same H. A. Rey who wrote Curious George):
Rey, H. A., 1966. The Stars: A New Way to See Them, Boston: Houghton Mifflin.
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