SECTION 1 TIME— 30 MINUTES 38 QUESTIONS DIRECTIONS

19. It can be inferred from the passage that

more extended and of much greater mass than was

compared with what they now think, until fairly

hitherto thought. However, all that is visible of the

recently astronomers believed that that the Milky

Way

constituents of the Milky Way's corona (outer

edge), where much of the galaxy's mass must be

located, is a tiny fraction of the corona's mass.

(A) was much darker

Thus, most of the Milky Way's outlying matter

(B) was much smaller

must be dark.

(C) was moving much more slowly

Why? Three facts are salient. First, dwarf

(D) had a much larger corona

(E) had much less gaseous matter

galaxies and globular clusters, into which most of

the stars of the Milky Way's corona are probably

bound, consist mainly of old stars. Second, old