Which statement illustrates the fact that two different theories can both agree with the same set of observations?
A) Nonsense--it is impossible for two different theories to both be correct.
B) the theories of Ptolemy and Copernicus, before Tycho made his observations
C) the theories of Copernicus and Kepler, after Tycho made his observations
D) the theories of Galileo and Kepler
E) the Earth-centered circular orbit theory of the early Greeks, and the later theory of Ptolemy
B
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Kuiper belt objects appear to be ancient planetesimals that formed in the outer Solar System but were never incorporated into a planet
a. True b. False Indicate whether the statement is true or false
Which of the Jovian planets has a giant circulating storm that called the Great Red Spot that has lasted for centuries?
a. Pluto b. Uranus c. Neptune d. Saturn e. Jupiter
Of the following systems, which contains the most heat?
a. 100 kg of water at 80°C c. 600 kg of ice at 0°C b. 250 kg of water at 40°C d. Systems do not contain heat.
What evidence did astronomers use to prove jets travel in opposite directions?
a. spectral lines from fast-moving red- and blue-shifted ionized gas b. gamma ray emission spectra c. magnetic tubes in accretion disks d. mass transfer from a binary star to a compact companion e. pulsar rotation periods