Elements, chemical, present in the sun, [270].
Elongation, the angular distance of a planet from the sun.
Emersion, the reappearance of a body after it has been eclipsed or occulted by another.
Equator, terrestrial, the great circle half-way between the poles of the earth. When the plane of this is extended to the heavens, the line of contact is called the celestial equator.
Equinox, either of the points in which the sun, in its apparent annual course among the stars, crosses the equator, making days and nights of equal length.
Evolution, materialistic, [182]; insufficient, [189].
Fizeau determines the velocity of light, [23].
Forces, delicate balance of, [144].
Galileo, construction of his telescope, [43].
Geocentric, a position of a heavenly body as seen or measured from the earth's centre.