THE STARS- BLOG ENTRY

WHAT IS A STAR?
1. Stars are huge hot objects that brights. They can be different types, sizes, colors, class. They can have different temperature and luminosity. stars are born in gas clouds and die in the end of their lives.



TYPES OF STARS.
2. There are four types of stars which are main sequence, white dwarfs, giant and supergiant. the stars are also classified by their size, luminosity, spectral class, ages, temperature, color and mass.

Main sequence's stars can be different temperature, luminosity, colors and spectral class. But they are mostly middle size. White dwarf stars are white, small hot, dim and they have very low luminosity. They can have A,B,F spectral class.  Giant stars are very large, cold, but bright.  These stars can have   different spectral class and color. Supergiant are super huge bright stars that can be different colors, temperature and spectral class.

H-R Diagram.
3. H-R diagram or the Hertzsprung-Russell Diagram is a diagram that astronomes use to sort stars on their color, size, temperature, type and luminosity. It also shows releanshiontips and differences between the stars.

NUCLEAR FUSION.



4. Nuclear difusion is when the nuclear reaction inside a star change two hydrogen gas 
molecule.








THE LIFE CYCLE OF A STAR.

5.Stars have a life cycle that tells us about how a star was born, how it lived during its life time and how it died. there are three different types of stars that pass throgh different stages.

Sun Like stars are born in  stelar nebulas, the next step after this is becomeing in  red giant stars, then they become planetory nebulas, after this they transform into white dwarfs and finally they finish as black dwarfs.Huge stars begin their lives in stellar nebula too, and then pass into  red giants, then they transforme into supernovas and end their lives as nuclear stars.Giant stars begin in the same way as huge and sun luke stars, but only in the end of their liveing they become black holes.