TMW: OUTER SPACE ( WHAT IS A STAR )
stars are huge balls of burning gas that are scattered throughout the universe.they burn for millions years,giving off both light and heat. stars produce energy by a process called nuclear fusion. the coolest stars are red and dim m while the hottest stars give off blue-white light the temperatures on their surface range from3,5000'c for cooler stars to over 40,000'c for the hottest stars. a new star is born when gas and dust are drawn together by gravity,forming a hugge clump. it heats up until nuclear fusion begins, and the new star appears in the sky
FACT FILE
stars die when they eventually use up all their fuel and burn out but this process take many millions of years. toward the end of its life, a star starts to run out of hydrogen to power its nuclear fusion. it starts to cool, becoming a red giant.
Reference:
The Big Book of tell me why( Chancellor Press )
IMAGES
