Question

Rotation 6) How many times brighter is -4.5 magnitude Venus over-1.5 Sirius. Show your work. -4.s -1.5 =-3 (2.5) 3 = .oby 7) What is the Period for the planets A-E? Show your work. 8) a) What is the orbital eccentricity of Planet D and E? Show your co work. b) What is the most-likely e value of Planets A, B, and C?

Answer 1

7) period of a planet , p = where d = distance of semi major axis.

sqrtd

for planet A , d = 1 , p =1

for planet B, d= 2 , p = 2.83

for period , C, d=5, p = 11.18

for period D, d= 2, p=2.83

for period E, d=5, p= 11.18

8)Eccentricity e = (Aphelion - perihelion)/ (Aphelion+perihelion)

where Aphelion is the major distance of the planet with the sun that is semi major axis. Perihelion is the smaller distance of the planet with the sun.

for A , e = 0, because the major distance and the smaller distance = 1 where it is circular in shape. (1-1)/(1+1)=0.

for B , e= 0, because the major and the smaller distance = 2, (2-2)/(2+2)=0. It is circular in shape.

for C, e=0 where as it is circular in shape, d = 5, (5-5)/(5+5)=0

for D , Aphelion = 2, perihelion = 1, e=(2-1)/(2+1) = 0.33

for E, Aphelion = 5, perihelion = 2, e = (5-2)/(5+2)=3/7 = 0.43