A planet sweeps out two very small sectors of equal angle Δθ – one when it is at perihelion (distance rP) and the other when it is at aphelion (distance rA). If the corresponding times taken are tP and tA, which statement is correct?
a) tP=tA
b) tP>tA
c) tP<tA
d) The comparison cannot be made without knowing Δθ exactly