There are an estimated 1011 galaxies in the observable Universe. Please note that the entire Universe is much bigger than that, but it is not known how much bigger. It may, or may not, be infinitely big, in which case there might be infinitely many galaxies.
About 30.
yes
NO! galaxys are many thousand times bigger than our solar system
At its centre.
Ultraviolet
The path of univers's galaxys
The center of the elliptical galaxy is very dense with many stars, and density decreases farther out.
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the milky wayis the galaxy that our sun is in
Itouch defiantly.
Between $120-$150
5cm wide and 8cm tall