this post was submitted on 05 May 2024
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[–] [email protected] 32 points 4 months ago (3 children)

Must've had a lot of copper in that asteroid.

[–] [email protected] 3 points 4 months ago

Alternatively or additionally, I think oxygen plasma glows blue or green, because northern lights (near the poles, at least) are greenish.

[–] [email protected] 8 points 4 months ago

A lot of spaceship debris looks like this because copper is used in a lot of rocket engines.

[–] [email protected] 21 points 4 months ago* (last edited 4 months ago) (2 children)

Probably nickel and/or salts of barium. Copper burns blue as a pyrotechnic colorant.

[–] [email protected] 4 points 4 months ago

Depending on the salt you can make both blue and green. Copper sulphate flame test is a pretty common school lab practical isn't it?

[–] [email protected] 6 points 4 months ago

Ah ok. I was going to say nickel but I did a quick search and somehow I read that it was copper.