Heat Temp. Question. Calculation of Heat Energy. Please Help.

Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?

Am i correct on these two physics questions?

Which color of light has a longer wavelength than yellow? a. red b. blue c. green d. violet