Astronomers can tell that the Sun moves at about _____
A) 225 km/s
B) 240 km/s
C) 265 km/s
D) 280 km/s
A
You might also like to view...
The total momentum of a flock of identical birds could be zero only if the birds are
A) taking off from the ground. B) flying in the same direction. C) flying in different directions. D) very tired and coming down to rest.
What is the approximate age of the star cluster in the accompanying figure (Figure 12-1)?
Study this H-R diagram. Which of the following stars has (or had) the longest hydrogen fusing lifetime? (The red arrows help you locate these stars on the diagram.)
A) Barnard's star B) Alpha Centauri B C) Betelgeuse D) the Sun
The overall fusion reaction by which the Sun currently produces energy is
A) 3 H ? 1 Li + energy. B) 3 He ? 1 C + energy. C) 4 H ? 4 He + energy. D) 6 H ? 1 He + energy. E) 4 H ? 1 He + energy.