The Solar System is located about 8 light-years away from the Galactic center.
Answer the following statement true (T) or false (F)
False
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In the symbol for the Hubble type of a galaxy, SBc, the "B" denotes
A. the presence of a bar B. a large bulge component C. loosely wound spiral arms D. the presence of a ring E. tightly wound spiral arms
The shape and size of a nucleus can best be described as
The Dynamo Theory holds that
A) lightning plays a major role in generating our magnetic fields. B) any other planet of similar density will also have a strong magnetic field. C) the Earth's core, like Mercury's, is now a solid, rigid bar magnet. D) magnetic fields are generated by rapidly spinning, fluid magnetic interiors. E) the Earth's magnetic field must switch polarities every few million years.
In strength, the magnetic fields of Uranus and Neptune are
A) very different, with flopped over Uranus having no field, and Neptune a strong one. B) similar, with both about 100 times stronger than our own. C) even stronger than that of Jupiter. D) perfect fits for the Dynamo theory. E) like Jupiter and Saturn, due to mantles of liquid metallic hydrogen.