6
$\begingroup$

This question already has an answer here:

The Inmarsat-5 from SpaceX launched earlier today. I was watching the broadcast and noticed a brief green flame during ignition. What caused this? enter image description here

$\endgroup$

marked as duplicate by Jan Doggen, Brian Tompsett - 汤莱恩, Hohmannfan May 16 '17 at 12:10

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 2
    $\begingroup$ That's a beautiful screen shot! If you search for "green" here you can see that it's been asked already here and there's a good answer. You can read more here as well. $\endgroup$ – uhoh May 16 '17 at 3:29
7
$\begingroup$

That's the TEA-TEB mixture used to start the engines. The boron in the TEB is responsible for the green flame.

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.