Other Links - How Old Are the Jewels?
For more information on stars and stellar evolution, the
determination of stellar temperatures, and the Hertzsprung
Russell diagram, check the following links. These sites
provide materials and activities which can enhance understanding
of the determination of stellar ages from star clusters.
Space Telescope Science Institute's (STScI)
Amazing Space unit
Star Bright" provides background information on the light from stars
and how astronomers use it to learn about stars.
a product of NASA's Goddard Space Flight Center,
provides good background information on
stars and stellar evolution at a middle school level.
Imagine the Universe,
also from NASA Goddard, offers a more advanced discussion of
The Science Museum of Virgnia
offers a site on
stellar temperatures and how
to measure them aimed at grades 7-12.
See especially their discussion of
Hertzsprung Russell diagrams.
An on-line lecture at the University of Oregon's
Physics Department describes the
brightness-color diagrams of star clusters at different ages.
[ Jewels of the Night Home Page
National Optical Astronomy Observatories, 950 North Cherry Avenue, P.O. Box
26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360