The Heat Death is accepted by most as the end of the Universe, but how can that be? Wouldn't the Big Crunch make a lot more sense? I mean, even if everything in the Universe is spread out uniformly and still expands (which is the Heat Death as far as I know), wouldn't gravity, even if extremely slowly, pull everything back together, so that the Big Crunch happens? Even if gravity gets a lot smaller the further something is away, there is still a minimal force left, which over time should lead to the Big Crunch, or not?
Observational evidence indicates that the expansion of the universe is accelerating, not decelerating. In fact, according to the best cosmological model, it has been accelerating for the last five billion years.
The theoretical reason for the acceleration is believed to be dark energy uniformly filling the universe and providing a repulsive effect that exceeds the attractive effect of the matter and radiation in the universe.
There is no evidence to support a Big Crunch in our future.