Charon's orbit
A) is retrograde.
B) lies exactly in Pluto's orbital plane.
C) is highly inclined to Pluto's orbital plane.
D) is perpendicular to Pluto's equator.
E) has not been determined yet.
Question 2
Which of the following best describes why we have seasons on Earth?
A) The tilt of Earth's axis causes different portions of the Earth to receive more or less direct sunlight at different times of year.
B) The varying speed of Earth in its orbit around the Sun gives us summer when we are moving fastest and winter when we are moving slowest.
C) The tilt of Earth's axis causes the northern hemisphere to be closer to the Sun than the southern hemisphere in summer, and vice versa in winter.
D) Earth's elliptical orbit means we are closer to the Sun and therefore receive more intense sunlight at some times of year than at others.
African lions are highly social predators.
Discovery of Charon
Rain seen from a plane
Changes in Earth’s Orbit
Orbital Motion of Earth and Other Planets
A horizontal, 2.00 m long, 3.00 kg uniform beam that lies along the east-west di