Computed Data for the Total Solar
Eclipse of August 11, 1999


Solar eclipses can be predicted with much precision using mathematical equations which take into account the motion and size of the earth, moon, and sun. The data presented in this set were computed by NASA long before the solar eclipse of August 11, 1999 took place. Mathematical models of the event enable observers to station themselves at prime viewing locations which allow them to see a rare phenomenon - a total solar eclipse. The data can also be used to predict the appearance of the partial eclipse for a given observer position.

In this activity, we will download the calculated data into spreadsheets for sorting and graphing variables which are involved in the eclipse.

Steps involved in this activity are:

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Last updated 9/27/2004.
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