The Galaxy
10 Apr 2015 | From Susan of Taiwan
OFFICIAL POSTCROSSING
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter. The word galaxy is derived from the Greek galaxias, literally "milky". Does it remind them of a milk shake? Galaxies are such a huge, infinite space. The majority of galaxies are gravitationally organized into associations known as galaxy groups, clusters, and superclusters. At the largest scale, these associations are generally arranged into sheets and filaments that are surrounded by immense voids.
Have you ever wondered what is out there - on the vast beyond? The realization that we live in a galaxy, and that ours is one among many, parallels major discoveries that were made about the Milky Way and other nebulae in the night sky. These vast and unexplored realms of space have triggered human interest and curiosity from then until now. Studies, observations, and modern research are still carried out up to this date and the future to come.
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