WHY HASN'T THE SUN BURNED OUT YET?

Don't have an account?
Just enter your email id or mobile no and create your account in two easy steps!

🇮🇳
- 🇮🇳
- 🇳🇿
LOGIN

I am a
looking for
Country

[{"type":"txt","id":"rich_1526717528138","data":" The sun is a relatively small and common star. It uses up its energy in a relatively slow rate. Besides that, it constantly receives more energy from celestial objects from the size of dust to asteroids and comets throughout its existence. The sun, contrary to scientific theory, will never burn out. <\/p> <\/p>This was a pressing question in the 19th century, says Catherine Pilachowski, an astronomy professor at Indiana University. During the olden days, humans only understood two ways the sun could be generating energy:- Either it was creating heat and light through gravitational contractions\u2014pulling itself in at the center and emitting energy (in the form of heat that we feel on Earth), therefore getting smaller over time\u2014or it was literally on fire, like the chemical reaction we see on Earth when we light a match or start a campfire. Scientists at that time calculated exactly how long the sun could have existed using both methods. But neither result squared up with what we knew the age of the solar system to be (4.5-5) billion years. If the sun were contracting or burning, it would have run out of fuel long before we came around.<\/p> <\/p> Just like inside a nuclear reactor, atoms inside the sun\u2019s core collide into each other every second. Most often, four hydrogen protons fuse together to create one helium atom. The sun will, eventually burn out. <\/p>The idea that fusion powers the sun fits the facts better than alternatives. If you believe as Rutherford suggested, that the sun is powered by radioactive decay, then you need a theory to come up with where the radioactive isotopes came from.\n\nAs far as direct evidence of fusion, the one best source of this is the observation of neutrinos from the sun. <\/p> <\/p> <\/p>"},{"type":"img","id":"img-uid-1526719349843","data":"5affe4fc69cd3"},{"type":"txt","id":"rich_1526719444285","data":" We can see the first step in the chain that powers the sun, two protons fusing into a deuterium nucleus, emits a neutrino (and a positron, for that matter).It beautifully explains the lifetime of stars like the Sun, the neutrino flux from the Sun, and many other properties of the Sun and stars like the Sun.<\/p>"},{"type":"txt","id":"rich_1526718731727","data":" Our sun is a medium sized star with a life expectancy of approximately 10 billion years. Since we think it's about 4.5 to 5.5 billion years old, this means the sun has half its life left.<\/p> This doesn't mean humans have half our life left. As the sun ages, in the second half of it's life, it burns hotter and grows larger, headed towards a red giant. Sometime less than 500 million years from now, our star will get too hot for life for mammals. \n\nHeating the Earth to a point where all liquid water on the surface will be gone, and all life will have ceased to exist on Earth. Then about 4 billion years from now our Galaxy and the Andromeda Galaxy will collide. There\u2019s a chance our Solar system will be kicked off free of the Milkway in this, but the point is really moot.\n\n\n\n\n\n<\/p>It is already burning. And it is expected to burn for 5 billion years more, after which it will run out of fuel (Hydrogen\/Helium), and will eventually turn into a planetary nebula and Earth will plunge into it.After less than 5 billion years, the Sun will no longer have any fuel and will swell up and become a red giant. <\/p>"},{"type":"img","id":"img-uid-1526720090911","data":"5affe792a6d17"}]

Message

Experience the best version of stumagz by getting the app.

Get College News, Updates
at just 5 MB

Complete Form

Experience the best version of stumagz by getting the app.

Get College News, Updates at just 5 MB

Complete Form

Responses

Get College News, Updates
at just 5 MB