The Primary Purpose of Describing Planetary Orbits in Terms of Epicycles

question 28

Multiple Choice

The primary purpose of describing planetary orbits in terms of epicycles and deferents was to account for the

• A) generally eastward motion of a planet compared to background stars while the whole sky appeared to move westward.
• B) variation of brightness of a planet with time.
• C) difference between the sidereal period and the synodic period of a planet.
• D) pattern of direct and retrograde motion of a planet as it moved slowly against the background of stars.

---

Definitions:

Boycotts

Acts of protest in which individuals refuse to engage in buying, using, or participating in services or activities as a means of expressing dissent or forcing change.

Martin Luther King, Jr.

A prominent leader in the American civil rights movement, known for his advocacy for nonviolent protest and racial equality.

Montgomery Bus Boycott

A pivotal event in the American Civil Rights Movement where African Americans refused to ride city buses in Montgomery, Alabama, to protest segregated seating.

MIA

An acronym that stands for Missing in Action, referring to military personnel whose whereabouts are unknown after engagement in combat.