How do stars perish?.. Scientists expect a "deadly collision race" scenario

 The universe is home to countless stars, each with a unique life cycle that culminates in its eventual demise. Understanding how these celestial bodies perish is crucial to gaining insight into the nature of our universe. One theory that scientists believe plays a significant role in star death is the "deadly collision race" scenario.

A star's life cycle begins with its birth, where clouds of gas and dust collapse under their own gravity, forming what is known as a protostar. In this stage, gravitational energy transforms into heat and light, causing the protostar to emit radiation. The main sequence phase follows this stage where the star reaches equilibrium between gravity pulling matter towards its center while releasing energy outwards through nuclear fusion reactions. 

As time passes by, stars eventually exhaust their hydrogen fuel which leads to them transitioning into red giants as they start burning helium resulting in outer shells expanding away from the core while inner cores shrink becoming denser over time. Finally, when all fuels have been exhausted, white dwarfs form – small dense objects containing about as much mass as our sun but condensed down to approximately Earth size.

One cause of death for many stars is due to stellar collisions - encounters between two or more stars resulting in merging or destruction of one body pitting neutron stars against black holes leading upsets in binary systems triggering supernova explosions followed by black hole formation leaving behind remnants like pulsars and magnetars.