The fact is that by using your definition Apollo was third in the sky !
If you count the Vostok and Voshkod spacecrafts, Apollo was Fifth.
There is no reason to believe that Nostradamus would only count American spacecrafts, so if he was so good at predicting, where is his prediction of Gagarin ?
His mission is one of the most significant achievements in history, yet not a single word from Nostradamus ?
Apollo was placed second in the skies. The skies above us.
I've explained Gemini already.
Mercury is used as a reference point for the Apollo flight paths.
There's no point in mentioning Gemini. He probably chose Mercury instead of Gemini because it works within the context of the quatrains - Sun, Moon, and the planets. Gemini doesn't fit so well, clearly....
Once more, second is the point where Apollo reaches to, above us in the skies. It is not about the second or fifth space mission, in a chronological order..
Gagarin wasn't mentioned? So what? This isn't about someone you think he should have mentioned.
The moon hoax quatrains are the issue here. As in Apollo. Not Gemini. Not Gagarin.
If you want to discuss the actual issue, go ahead... ...