Question

1. what is the name of this diagram? (write the title)
2. fill in the 3 missing terms and 1 symbol.
3. what does this diagram help explain?

area 1 ____ area 2

Explanation:

Answer:

1. Kepler's Second Law of Planetary Motion
2. Focus ($F$), Perihelion, Aphelion, $T$ (time)
3. A planet sweeps out equal areas in equal intervals of time.