How many solar systems does a galaxy contains

What is a galaxy?A galaxy is any of the systems of stars and interstellar matter that make up the universe. Many such assemblages are so enormous that they contain. . Are all galaxies the same shape?Galaxies differ in shape, with variations resulting from how the systems were formed and subsequently evolved. Galaxies are extremely varied not on. . What are the types of galaxies?Galaxy classification is based on the scheme proposed by the American astronomer Edwin Hubble. Hubble’s scheme is based on the optical appearance o. . What is an example of a Sa galaxy?NGC 1302 is an example of the normal type of Sa galaxy, while NGC 4866 represents one with a small nucleus and arms consisting of thin dust lanes o. [pdf]
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