Distance and Size of the Stars

I found an article at, https://www.universetoday.com/25331/size-of-stars/ , which talks about the sizes of stars. Stars can be smaller and they can be even bigger than our Sun. Red dwarfs are the smallest stars out there and there are no more than 50 percent of the mass of the Sun. They could also have little as 7.5 percent the mass of the Sun.

That is the minimum mass that a star needs to hold in order to support its nuclear fusion in the core. Below that mass it is a brown dwarfs. One example of a red dwarf is Proxima Centauri which is the closest star to Earth. This star has 12 percent of mass of the Sun and about 14 percent the size of the Sun. It’s about approximately 200,000 km across which is a little larger than jupiter.

Our Sun has a diameter of 1.4 million kilometers. When the Sun hits the end of its life it will become a red giant and will grow 300 times its original size and will consume the inner planets, including Earth. A larger star than our Sun is the blue supergiant Rigel which is in the constellation Orion. The star is 17 times the mass of our Sun. It has 66,000 times as much energy. It 62 times as big as our Sun.

Let’s talk even bigger. For example Betelgeuse which is 20 times the mass of the Sun. Astronomers think that Betelgeuse might explode within the 1,000 years. It has increased out to more 1,000 times the size of our Sun. The monster VY Canis Majoris is the biggest star in the Universe so far. It’s thought to be as 1,800 times the size of the Sun. If this star was in our solar system, it would touch the orbit of Saturn. My overall personal opinion of the article was very good because I learned so much about the stars. I would recommend that people should read it because it is pretty fascinating. This article relates to what I have done in class because it talks about the size and distance of stars which is what we talked about in class. I learned from class that atoms are widely spaced about 1 molecule per cm3 a nearly perfect vacuum. Convection cycle is the same with the sun. The sun is energy balanced. The clicker questions helped too when study the material.


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