The most basic difference between elliptical galaxies and spiral galaxies is that
A) elliptical galaxies lack anything resembling the halo of a spiral galaxy.
B) elliptical galaxies have a spheroidal component (of stars distributed spherically about the galactic center), and spiral galaxies do not.
C) elliptical galaxies lack anything resembling the disk of a spiral galaxy.
D) elliptical galaxies are very old and spiral galaxies are very young.
C
You might also like to view...
A 2.5 cm-long horizontal wire segment has mass 0.15 g and carries a current sufficiently large that it levitates when the segment is in a region of B field upward with magnitude 1.5 T. The current is passed to the segment that is in the magnetic field by way of massless electrical leads. What is the magnitude of the current that the wire carries?
A. 39 mA B. 25 A C. 4.0 mA D. Not enough information is given.
Charge carriers in a metal are electrons rather than protons because electrons are
A) negative. B) smaller. C) loosely bound. D) none of the above
What are the short- and long-term effects of the Moon's tides on our rotation?
What will be an ideal response?
You can tell whether a projectile is going upwards or downwards from the sign of __________
Fill in the blank(s) with correct word