Talk:Fuel/@comment-216.251.21.87-20160416190404
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Main sequence stars. Instead of "certain classes", it should say "main sequence stars"; that's more specific and informative. OBAFGKM stars, including giant and supergiant, can be scooped; that means no brown dwarves, no T-Tauri protostars, no carbon stars, white dwarves, neutron stars, or black holes.