All life is cyclical, every single trend in nature, space-related or otherwise supports this.
Not quite. Many things are cyclical, but...
Egg hatches chick, grows into chicken and lays egg...
Only occurs with energy input from the sun. Which has a finite lifetime.
Also: there's more ways for something to be ordered than chaotic. Therefore it's likely that an ordered system will break down (eg window breaks, ice cube melts), but highly unlikely for order to arise out of a chaotic system. (It
is possible for water to spontaneously form again into ice, if the random movements of molecules all happen to drift together simultaneously. Wait about a 100 trillion years. And the random movements of molecules (heat) in a solid object may someday all happen to be in the same direction, and the object will fly into the air.)
All complex systems in the universe will eventually break down into their constituent particles. Every energy transfer involves some energy being lost at heat, which is really just movement too random to be useful. The heat death of the universe will involve a randomly seething mass of elementary particles, with occasional order arising by random chance.
An interesting point: All observation seems to be that the universe is moving from a state of low entropy (order) to high entropy (chaos). However, it should not be this time assymetrical. Instead, we would expect to see a mean level of entropy with small statistical fluctuations. Instead, we are in a universe of (relatively) low entropy, high order, that is increasing in entropy as we go forward in time. There must have been less entropy in the past, perhaps at one point, zero entropy. But what caused this state?