Inkwenkwezi
right|260px|thumb|Ingingqi ekwenzeka kuyo inkwenkwezi kwilifu elikhulu iMagellanic. NASA/ESA image
thumb|right|260px|Isikhaxa seenkwenkwesi esivulekileyo Pismis 24 sikwinebula NGC 6357. Inenxalenye yeenkwenkwezi ezakhe zankulu. IPismis 24-1 inobunzima obungaphindwa-phindwa kanganga-300 kobo belanga. Yinkqubo yeenkwenkwezi ezintathu ubuncinane nephindwa-phindwayo.  

indlela engaqhelekanga ezibonakala zimile ngayo iinkwenkwezi kungenxa yemitha exananazileyo ekhutshwa zezi ziinkwenkwezi ezinkulu, nezitshisayo.  Lo mfanekiso uxuba olo lwazi lomfanekiso kunye nezihluzi ezintathu ezahlukeneyo ekukhanyeni okubonakalayo obukude babo buyimitha yetelescope e-1.5 Danish kwiESO La Silla Observatory eChile.
thumb|250px|right|iCrab Nebula, iintsalela zesupernova eyathi yabonwa kuqala ngeminyaka yoo-1050 AD

Iknwenkwezi is a massive ball of plasma (very hot gas) held together by gravity. It radiates energy because of the nuclear reactions inside it

It radiates heat and light, and every other part of the electromagnetic spectrum, such as radio waves, micro-waves, X-rays, gamma-rays and ultra-violet radiation. The proportions vary according to the mass and age of the star.

The energy of stars comes from nuclear fusion. This is a process that turns a light Ikhemikali into another heavier element. Stars are mostly made of hydrogen and helium. They turn the hydrogen into helium by fusion. When a star is near the end of its life, it begins to change the helium into other heavier chemical elements, like I-carbon and I-oxygen. Fusion produces a lot of energy. The energy makes the star very hot. The energy produced by stars radiates away from them. The energy leaves as electromagnetic radiation. 

 Birth of a star 

A star begins as a collapsing cloud of material made mostly of hydrogen, with helium and tiny amounts of heavier elements. Once the stellar core is dense enough, some of the hydrogen is changed into helium through nuclear fusion. The energy moves away from the core by a combination of radiation and convection. The star's radiation stops it from collapsing further under its own gravity. Once the hydrogen fuel at the core has been used up, those stars with at least 0.4 times the mass of the Sun expand to become a red giant.

Imithombo

Category:Masiguqule


what are the elements that make up a star
Answer: helium and tiny amounts of heavier elements