Not exactly anyway. I remember years ago, looking up the word in Google and only the blink song coming up in the search results, and paid it little mind beyond that. Today though, after listening to the amazing song for the thousandth time, I got reminded how I never saw his definition pop up anywhere. For those unaware, back when Untitled was new, he claimed that Asthenia meant:
"This song is about one thing only, an astronaut sitting in a space capsule about the size of a car, floating above the earth. He's contemplating if even coming back or not will make a difference on such a negative place. A song about the loss of hope. A term was coined for the breakdown of life in space and it is called Asthenia, the name of the track. At the beginning of the song are actual NASA transmissions."
I always loved this idea, that we had a word for such a state of being. But looking up the word today, Merriam-Webster describes Asthenia as: lack or loss of strength. Dictionary.com has the same definition.
And that's it. There is no additional meaning to the word. As far as I can tell, making it about outerspace is entirely on Tom. I question if he was trying to add meaning to the word and be the one that coined it as such. I mean I kinda love that if that is the case, but all the same, I feel the need to call it out. Did someone misinform him, did he simply remember incorrectly, or was he trying to manipulate the English language by giving a cool new term to something that doesn't really have a proper label?
I will always view the word as essentially holding Tom's meaning of being in space and no longer having a desire to return home, even if that isn't what the word technically means.