Star streams that are seen around the Milky Way Galaxy are probably the result of:
A) stars ejected from the Galaxy by gravitational encounters with the central black hole.
B) tidal interactions with satellite galaxies.
C) a collision with a large galaxy in the distant past.
D) stars being pulled from the Andromeda Galaxy.
E) spiral density waves.
B
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What feature of interstellar dust is inferred by the polarization of starlight?
A) its shape B) its composition C) its location in space D) its presence in molecular clouds E) its presence in dark nebulae
The expression(s) indicating the number of nucleons in a nucleus is
a. A b. N c. Z d. Z + N e. A – Z
Adams and Leverrier both predicted the position of Neptune, based on its effects on
A) the Sun. B) Saturn. C) Pluto. D) Jupiter. E) Uranus.
Is there a connection between population growth and land use? Explain
What will be an ideal response?