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Results tagged with galaxies
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user 35928
Galaxies are gravitationally bound systems of stars, interstellar gas and dark matter, often hosting a central supermassive black hole. For questions about the structure, composition, dynamics, classification, etc. of galaxies. This includes small systems of interacting galaxies (i.e. merger, or galaxy + satellite system), but for galaxy groups and clusters use [galaxy-clusters], and for questions specific to our own Milky Way galaxy use [milky-way].
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How is the observable universe mapped?
Honestly, the universe really is that big! Well, we assume/model that it's actually bigger (the un-observable universe). Some diagrams and such may not be to scale, but I imagine that one and similar …
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