who coined the term event horizon
Weinberg uses Rindler's definition. In fact, he credits Rindler with having coined the term event horizon [and particle horizon] in a 1956 paper. On the other hand, Misner, Thorne, Wheeler distinguish between two kinds of horizons: (1) horizons in cosmology, and (2) horizons in black hole physics.or one thing, the overall negative curvature of the universe in these models is inconsistent with the idea of the universe as a black hole. More fundamentally, we need to distinguish between the general notions of an event horizon and the boundary of a black hole.