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penumbras
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View Fifty year canon of solar eclipses, 1986-2035 By Fred Espenak,United States. National Aeronautics and Space Administration 
Fifty year canon of solar eclipses, 1986-2035
By Fred Espenak,United States. National Aeronautics and Space Administration
View Annular and total solar eclipses of 2003 By Fred Espenak
Annular and total solar eclipses of 2003
Annular and total solar eclipses of 2003
By Fred Espenak
View Method for the calculation of spacecraft umbra and penumbra shadow terminator points By Carlos R. Ortiz Longo
Method for the calculation of spacecraft umbra and penumbra shadow terminator points
Method for the calculation of spacecraft umbra and penumbra shadow terminator points
By Carlos R. Ortiz Longo