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Cassiopeia A.. Elements formed.
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25-12-2017, 04:24 AM
skysurfer
Dark sky rules !
Join Date: Dec 2011
Location: 52N 6E (EU)
Posts: 1,152
Why don't we see this supernova remnant with our telescopes or even AP equipment, like the bright Eta Carinae, or the Veil Nebula ?
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