Oknight t1_j4mpblo wrote
Reply to comment by [deleted] in How do we know that we are in a certain place inside our galaxy? and how do we know how big it is just by looking at the cross section we are in? by friday_panda
Problem is, what do you mean by the "size" of the galaxy? Where is the edge of a cloud?
Puppy-Zwolle t1_j4myljc wrote
You mention one of the issues. This one is among the rather fluid definitions like; ''How big is a planet ''and ''How small is a moon''.
Size is a relative as big and small. The moon is smaller than the sun and bigger than a tomato. In galactic perspective that's already pretty close.
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