The correct order of appearance of the following "actors" on the "stage of scientific discovery" is:
a.Ptolemy, Copernicus, Kepler, Newton, Einstein
b. Ptolemy, Kepler, Copernicus, Newton, Einstein
c. Copernicus, Newton, Kepler, Einstein, Ptolemy
d. Ptolemy, Copernicus, Newton, Kepler, Einstein
The dust tail of a comet has which of the following characteristics?
a. Curved, wide, without structure, and transparent to starlight
b. Spherical, very large, and of low brightness, centered upon the comet nucleus, showing up only on UV photographs
c. Narrow, straight, and pointed directly at the Sun at all times
d. Long, straight, structured, and pointed directly away from the Sun
Which of the following are the Jovian planets?
a. Jupiter, Saturn, Uranus, Neptune, and Pluto
b. Jupiter only
c. Jupiter, Saturn, Uranus, and Neptune
d. Mars, Jupiter, Saturn, Uranus, and Neptune
e. Mercury, Mars, and Pluto