I'm trying to find a short story about humans (I think) who were planning to "mine" something from the atmosphere of Jupiter and found unknown gaseous creatures living in the atmosphere. I don't think things ended well for the gaseous creatures. Thank you!
Could this be part of the 1982 novel 2010: Odyssey Two by Arthur C. Clarke?
In that novel, aliens turn the planet Jupiter into a star to give more light to the living creatures on Jupiter's moon Europa. When they do this, they sacrifice the primitive beings that used to live in the atmosphere of Jupiter.