Large orange/yellow sphere w/pulsating energy imploded , disappeared then seemed to exploded returning to preious shape but larger.

Fireball sighted on Paul A. Dever State School grounds (now Myles Standish Industrial Park) in Taunton, Mass.  Dates approx. Oct/Nov 1976.  Myself and 2 others driving through heavly wooded back roads of state school came across large orange/yellow sphere, which was stationary in the sky appears almost liquid with pulsating energy or sparks,or aura(almost like line patterns in it,constantly moving).  It's distance I would say was approx. 300 ft away-it was huge like a sun! We were just teenagers at the time and were goofing around flashing the car lights, opening the cars windows, waving at it and saying "over here, over here!"Unsure of the time duration but the sphere imploded, disappeared, then exploded returning to previous shape but seemed larger. We obviously got very frightened, screaming (the only male there cried uncontrollably) we drove away with it following us,it then seemed to disappear over trees. This is something that has bothered me for 23 years. Also around 94/95 my ex-husband & others spotted a similar object on roadside(Tremont St.Taunton)3-4 cars observed the object.
Date in November 1976 is approximate.  PD