Should probably tell this guy, he's trying to figure it out too:
Joshua Semeter is the director of Boston University's Center for Space Physics. He is also part of a panel researching unidentified anomalous phenomena (UAP). The acronym has replaced UFO.
In his opinion, they are too small to hold the amount of gas needed to be a balloon at that altitude.
https://www.cbsnews.com/amp/boston/n...e-adversarial/