Another star is forming right now. The star stars out as a nebula which is basically a big ball of gas., dust are rocks. The nebula has clumps and gravity slowly pulls all of this gas together, and because this is a big nebula it is going to be a big or massive star.
All of the gas in the nebula creates a protostar. A protostar is a star but its core is not hot enough for fusion to take place.
This stage in the star's life is when it stars nuclear fusion. This means that the star will began to heat up and it is when it is sorta a star but not really.
This a in the stars life when it is the longest star. This star will live around 10 billion years. This stage of its life is a main sequence star, but becuase of all the has in the nebula it becomes a high mass sequence star.
When the star runs out of hydrogen gas to create nuclear fusion it creates heavier element and becomes a supermassive red giant which is 150 times bigger then the sun.
The supermassive red giant will become unstable and will collapse in on it self and form a black hole which sucks up anything including light, which is why they appear black,