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.
Malignant melanoma. This photograph demonstrates the highly characteristic color of this tumor.
Types of paralysis: (A) Quadriplegia is complete or partial paralysis of the upper extremities and c
Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
Retrograde pyelogram. A contrast medium is injected into the ureter using a cystoscope, and the X-ra
Pluto
The undersurface of the tongue is highly vascular