Types of stars

Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars.

• Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.
• Aside from our Sun, stars appear as dots of light in the sky. Each and every one of them is light-years away from us and much brighter than our own star, the Sun.
• Stars are the building blocks of galaxies and in a sense life as we know it.
• Our galaxy the Milky Way contains an estimated 300 billion stars alone.
• Observations concluded that stars with high mass usually have shorter life spans. They nonetheless last for billions of years in general.
• Stars are usually birthed in hydrogen-based dust clouds called nebulae.
• Stars are classified by their spectra and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. This is known as the Morgan–Keenan (MK) system.
• The majority of all stars in our galaxy and even the Universe are main-sequence stars. Our Sun is a main-sequence star, and so are our nearest neighbors, Sirius and Alpha Centauri A.
• The majority of stars, at least until now observed, are typically red dwarf stars.
• Many stars come in pairs. They are binary stars that orbit a common barycenter.
• Stars have life cycles based on their initial mass.
• Stars do not twinkle. This is usually caused by Earth’s turbulent atmosphere instead.
• As far as the human eye can tell, there are no green stars. At least, we can’t perceive them.
• With the naked eye, we can perceive around 2.000 – 2.500 stars.

Stars are celestial objects that can produce their own light. They are extremely hot and extremely large. They are mostly made up of hydrogen gas with a little helium in them. The sun is also a star; the sun’s energy and light play one of the key roles in sustaining all forms of life on earth.