The author most likely discusses Kepler's predictions in order to A. illustrate the observable effect solar winds have had on other celestial objects B. denounce Kepler's work as unreliable because the technology required to study solar winds directly has only been developed within the last century C. describe more generally the first major contribution to the study of solar winds and the sun D. disprove Kepler's theories on the motion of comets and auroras E. establish a standard against which to compare the observations concerning the atmospheres of Mars and Mercury