37. Q. How does the mass of all the asteroids compare with that of the earth? A. It is less than one-fourth of the earth.
38. Q. Since what time have all the asteroids known been discovered? A. Since the commencement of the present century.
39. Q. What is the mean distance of Jupiter from the sun? A. 475,692,000 miles.
40. Q. What is the mean diameter of Jupiter? A. Eighty-six thousand miles.
41. Q. What is the volume of Jupiter compared with that of the earth? A. It is thirteen hundred times larger.
42. Q. What is the length of a Jovian day? A. About ten hours.
43. Q. How many satellites has Jupiter. A. Four.
44. Q. What is the mean distance of Saturn from the Sun? A. 881,000,000 miles.
45. Q. What is the mean diameter of Saturn? A. Seventy thousand five hundred miles.
46. Q. How does the time of the axial revolution of Saturn compare with that of Jupiter? A. It is nearly the same.