A low or medium mass star will eventually evolve into a red giant as it depletes its core hydrogen fuel. Towards the end of its life, it will shed its outer layers and form a planetary nebula, leaving behind a dense core called a white dwarf.
A low to medium-mass star eventually evolves into a red giant as it runs out of fuel in its core. After shedding its outer layers, the star will collapse into a white dwarf, which is the end stage of its life cycle.
Once a medium sized star has consumed all it's fuel it becomes a White Dwarf star (just the extremely dense core of the original star remains composed mainly of carbon). A White Dwarf star will, however, eventually lose it's heat to become a Black Dwarf.
The Boomerang Nebula is a planetary nebula [See related question]. It would have been formed when a medium sized star came to the end of it's life and in that process shed off layers of material from the star. This created the nebula we see today.
Less massive stars end up as white dwarfs. More massive stars end up as a supernova or a neutron star or for the really massive stars...as a black hole. As a star ends its time in the main sequence it either becomes a Red Giant and end its life as a White Dwarf or becomes a White Super Giant and ends its life in an explosion (supernova) and if it's really dense it becomes a neutron star or a black hole as mentioned above.
A low or medium mass star will eventually evolve into a red giant as it depletes its core hydrogen fuel. Towards the end of its life, it will shed its outer layers and form a planetary nebula, leaving behind a dense core called a white dwarf.
size
A low to medium-mass star eventually evolves into a red giant as it runs out of fuel in its core. After shedding its outer layers, the star will collapse into a white dwarf, which is the end stage of its life cycle.
I think it´s mass.
Once a medium sized star has consumed all it's fuel it becomes a White Dwarf star (just the extremely dense core of the original star remains composed mainly of carbon). A White Dwarf star will, however, eventually lose it's heat to become a Black Dwarf.
Yes, a star of low to medium mass, like the sun, will eventually turn into a white dwarf at the end of its life cycle. This occurs after the star has exhausted its nuclear fuel and shed its outer layers.
The average star will become a white dwarf at the end of its life.
The mass of the star.
No, a protostar is basically the BEGINNING of a star's life cycle.
Yes, unless it goes one step further and becomes a black hole.
I don't know about blue giants, but red giants are at the end of a star's life.
The Boomerang Nebula is a planetary nebula [See related question]. It would have been formed when a medium sized star came to the end of it's life and in that process shed off layers of material from the star. This created the nebula we see today.