Hypergiants are relatively rare. Only a few stars become hypergiants, and they don't last very long (only a few million years). Probably a few in every major galaxy.
No, red giant stars are not the largest stars in the universe. There are stars known as supergiant and hypergiant stars that are even larger than red giants. These stars can be hundreds to thousands of times larger than our Sun.
In stars.
Mainly inside of galaxies.
Neutronium, hyper-dense atomic nuclear material stripped of all electrons.
No, there are many other red giant stars in the Universe. Betelgeuse and Aldebaran are well-known red giants because they are bright and easily visible from Earth, but there are numerous others that exist both within our own galaxy and beyond.
The universe.
Hydrogen is the most abundant element in the universe, making up 75% of ...Thiselement is found in great abundance in stars and gas giant planets.
Giant and supergiant stars are rare because they represent later stages in the life cycle of a star, which are shorter in duration compared to the main sequence phase. Additionally, the formation of giant and supergiant stars requires a massive initial stellar mass, which is less common in the universe.
Some of the SUPER GIANT stars are Sirius,Sun,Rigel,Betelgeuse,and procyon.
Giant stars are massive, luminous stars that have reached the later stages of their life cycle. They are larger and hotter than main sequence stars, like our Sun, and are often in the process of expanding and cooling as they exhaust their nuclear fuel. Giant stars are crucial for the creation of heavy elements in the universe through nucleosynthesis processes.
The stars -or anything in the universe, for that matter- do not have a purpose. The concept of "purpose" is a man-made concept. The stars exist because gasses and other elements coagulated to form them.
If there were no stars, the Universe would be devoid of the light, heat, and energy that stars provide. This would drastically alter the formation of galaxies, planets, and the conditions necessary for life to exist. The absence of stars would lead to a dark, cold, and lifeless Universe.