Which of the following is not a pattern of motion in our solar system?
A) Planets all orbit in the same direction.
B) Planets all rotate in the same direction.
C) Planets all orbit the same direction as the Sun's spin.
D) Large planets all have many moons orbiting them.
B
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What is the most likely outcome after the collision between two spiral galaxies?
A. the destruction of most of their stars B. formation of a larger galaxy C. enhanced formation of spiral arms D. All of these choices are correct.
Recall that Hubble's law is written v = H0d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubble's constant. Suppose H0 = 65 km/s/Mpc
How fast would a galaxy located 500 megaparsecs distant be receding from us? A) 65 km/s B) 65 Mpc/s C) 32,500 km/s D) 9 km/s E) 0.65 times the speed of light
The 21-cm line of hydrogen is strongly absorbed by interstellar dust
Indicate whether the statement is true or false
Wave speed and wave frequency are two terms that are
A) basically the same. B) fundamentally different from each other. C) opposites. D) reciprocals.