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Things You Didn’t Know About Stars

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There are about 200-400 billion stars in our galaxy alone. Some are incredibly big and some very small, but what is a star? A star is a big ball of gas, mostly composed of hydrogen and helium held together by the stars own gravity. The temperature in its core it so hot it produced nuclear functions and made energy. One of the closest stars to our planet is the Sun, but how much do you know about stars.

There are many types of stars, but one of the most common is the red dwarf. Scientists believe that 20 out of the 30 stars closest to earth are red dwarf, but this star is way too dim to be seen without any equipment due to their low temperature. Red dwarf stars can take up to 10 trillion years to use up all of their fuel. Most stars are between one and ten billion years old.

Stars are categorized from dwarf to supergiant that can be bigger than our sun. Although you may think the bigger the star, the longer they live that is not always true as bigger stars tend to die faster than smaller stars. Since the stars are bigger, they need way more fuel and burn it up faster than smaller stars who don’t need as much foul. As the stars die, most of their hydrogen has become helium. The helium produced causes the star’s core to start to shrink making the star hotter and its outer shell to start to expand.   

You may have noticed that some stars are brighter than other stars. Their brightness depends on how much energy they put out also known as luminosity, and the distance they are from the earth. Stars can also be a variety of colors. This is because stars all have different temperatures. White or blue stars tend to be hotter than orange or red stars which are much cooler.   

Stars have formed part of many religious practices, been grouped into various constellations, used in astrology star signs, helped design calendars and were very important navigational tools for early explorers across both land and seas. All in all, stars have played a huge role throughout human history, and we are still learning about them today.

 

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Things You Didn’t Know About Stars