The helium flash occurs Naim 01:20 Astronomy 101 The helium flash occurs a) when T-Tauri bipolar jets shoot out. b) in the middle of the main sequence stage. c) in the red giant stage. d) during the formation of a neutron star. e) in the planetary nebula stage. Answer: c) in the red giant stage. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+