A huge group of stars is called a galaxy. Galaxies also contain other celestial bodies, such as planets and asteroids. A star cluster contains a lot of stars but not as many as a galaxy.
Stellar mass is a phrase that is used by astronomers to describe the mass of a star. It is usually enumerated in terms of the Sun's mass as a proportion of a solar mass ( M ☉). Hence, the bright star Sirius has around 2.02 M ☉.
Giant stars have masses from eight times to as much as 100 times that of the mass of our sun. These massive stars have hotter and denser cores than dwarf stars (stars that are smaller than five times the mass of our sun). Therefore, giant stars have a greater rate of the nuclear reactions that light up stars.
What do we call a large group of millions of stars?
Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a thousand stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's center of mass.
Stars appear in the sky in the form of clusters called galaxies. Galaxy contain several million of stars. Their size can range from few thousands to several hundred thousand light years. They have different shapes and brightness.
By measuring the number and luminosity of observable galaxies, astronomers put current estimates of the total stellar population at roughly 70 billion trillion (7 x 1022). However, those estimates are dependent on the sensitivity of current telescopes.
What is a large collection of billions of stars called?
Note: The huge system of stars is called a galaxy. The Galaxy is a tremendous system. It is located in space with a lot of stars, interstellar gas, dark matter, stellar remnants, and dust. It's all kept together by gravity. So, an extensive collection of the billions of stars, dust, and gas in space is called a galaxy.
Globular clusters are stable, tightly bound clusters of tens of thousands to millions of stars. They are associated with all types of galaxies. Globular clusters are typically much larger than open clusters and are tightly gravitationally bound.
A system of millions or billions stars which are together with gasses or dust and they are all held together with the help of gravitational force of attraction is called a galaxy.
Although they are extremely rare, comprising less than 1% of the total stellar population, they make their presence known by dominating the surrounding interstellar medium (ISM) with their powerful stellar winds as well as shocks from their eventual supernovae.
Overview: A star is a huge luminous ball of hot gas, mostly hydrogen and helium, held together by gravity. Nuclear reactions in the cores of all stars, including our Sun, produce energy in the form of light. Stars shine because this light works its way to the surface and radiates out into space.
