1. Which planet has the most eccentric orbit?
Mercury!
HOW DO YOU KNOW!

3. NOTICE IT’S ALWAYS TO A THOUSANDTH!!!!
Which planet in the solar system has the most eccentric orbit?
Which planet’s orbit is most circular?
NOTICE IT’S ALWAYS TO A THOUSANDTH!!!!
Mercury = .206
Venus = .007

4. How do we calculate eccentricity?

5. d = 1.4 cm
E = d/l
l = 4.0 cm
E = 1.4 cm/4.0 cm
E = 0.35 = 0.350

6. What is the eccentricity of Planet D?
The diagram shows the orbit of planet D around the star Upsilon Andromedae. The first four planets of our solar system are for comparison
The distance between the Star and the Second focus of Planet D’s orbit is 3.5 cm, and the length across the Line of major axis of orbits is 11 cm.
What is the eccentricity of Planet D?
e = 0.318