What side of a topographic map would be easier to climb

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?

Rohit is trying to tune an instrument

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?