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| | World Almanac for Kids |
 | | By the radiation of its electromagnetic energy, the sun furnishes directly or indirectly all of the energy supporting life on earth, because all foods and fuels are derived ultimately from plants using the energy of sunlight. |
 | | Because of its proximity to the earth, and because it is such a typical star, the sun is a unique resource for the study of stellar phenomena. |
 | | Aside from its calendrical or positional importance in marking, for example, solstices, equinoxes, and eclipses, the quantitative study of the sun dates from the discovery of sunspots, and the study of its physical properties was not initiated until much later. |
| www.worldalmanacforkids.com /explore/space/sun.html (2089 words) |
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