We were born out of mankind's unquenchable thirst;
Despite my name, I wasn't the first:
Because of a difference in trajectory
My "younger" twin was born 16 days before me.
We were recently joined by a guy with a towel
And our fictional brother lost all but one vowel.
Though more than hundredfold faster than a speeding bus,
You are actually right now catching up to both of us.
Who am I?