- #1
wolram
Gold Member
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So far i have found two theorise of how they form, the SSPSF
shock wave model ,and the Density wave model, or they may
form by a combination of the two.
As i am not sure how old these theories are, i wonder if there are
any new insights on the subject?
shock wave model ,and the Density wave model, or they may
form by a combination of the two.
As i am not sure how old these theories are, i wonder if there are
any new insights on the subject?