Question: Your trip to Mars is accomplished by using an elliptic transfer orbit going from Earth to Mars as shown in Fig. 1. This trajectory assumes

Your trip to Mars is accomplished by using an elliptic "transfer orbit" going from Earth to Mars as shown in Fig. 1. This trajectory assumes that Earth at departure, the Sun, and Mars at arrival, are aligned. Also, we will assume that Earth's and Mars' orbits around the sun are circular, with radii R1 = 149000000 km and R2 = 229250000 km, respectively.

What is the eccentricity, e , of the transfer orbit?

Earth @ departure Sun Mars @ arrival Fig. 1. Transfer Orbit

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