The heavens declare the glory of God; and the firmament sheweth his handywork. Day unto day uttereth speech, and night unto night sheweth knowledge.
One of our favorite ways to study the Bible is to follow a doctrine through from the first time it's mentioned to the last. This is a great way to develop understanding of the doctrine in the broad narrative of scripture.
Myth buster: The Earth-sun orbit isn’t elliptical. The Earth-sun radius is, for all practical purposes, constant. Any apparent eccentricity is variation in the Sun’s orbital radius, not the Earth-sun radius.