WOW!!!! I always knew there were loads and loads, but this puts it into perspective.
A team of scientists from the Sloan Digital Sky Survey and its Baryon Oscillation Spectroscopic Survey have created a 3D map that plots 1.2 million galaxies. The end result can be seen below.
Daniel Eisenstein / SDSS-III Collaboration
This image contains 48,741 galaxies, about 3 percent of the total data — so each dot represents one whole galaxy, which in turn contains millions of stars (for point of reference, our Milky Way Galaxy alone has approximately 100 million stars).
Moreover, all this only covers about 1/20th of the sky, or about 650 cubic billion light years, which is just a quarter of the known universe, which in total is 6 billion light-years wide, 4.5 billion light-years high, and 500 million light-years thick. It is an unfathomable scale to comprehend, and very humbling to reflect upon.
Source: The Verge