Hi RaET, and welcome to the boards!
"Doesn’t science disprove mythological tales of battles in space?"
I'd say, there is nothing TO prove from science as myths are just that, myth's, fairytales!
As the years go by, I believe more and more that this is not a future, or a past (in time) event but...is happening as we speak! Science could never prove ANYTHING spiritually discerned as, they deal with "matter". So, We can certainly see the fallout I think, of this raging war in the "heavens" her on earth.
I know there are several ways some take this meaning as being, like...happened a long time ago, or, it hasn't happened yet, or even a dual purpose, meaning that Satan and Michael and the rest of the gang. Or that, Satan and his demon angels were put out of the HIGHEST heaven, where God resides? Satan is named as "The Prince of the Power of The Air"..... Atmosphere? Dunno but, we can count on the fact that Satan is still alive and well (somewhere) to do us all harm, if he can.
God Bless and be safe from the fiery arrows of the enemy~!!!