1. When the eccentricity increases the shape of
an ellipse becomes more elongated
and more of a straight line.
2. An object that has an eccentricity of zero is a circle.
3. An object that has an eccentricity of 1 is a straight line.
4. Venus is the planet with the least eccentric orbit.
5. Mercury is the planet with the most eccentric orbit.
6. Earth’s orbit is more circular because it has a very low eccentricity.
7. The percent deviation is 24%.
8. The percent deviation is 0%.
9. As the distance between foci increase, the eccentricity increases.
10. The eccentricity of Mars is 0.093.
11. Aphelion is where the Earth is farthest from the sun in its orbit. The date of Aphelion is
about July 4th. Perihelion is where the Earth is closest to the sun in its orbit. The date of
Perihelion is January 4th.
12. As the distance from a planet from the sun increases, the orbital velocity decreases. This
is one of Kepler’s laws.