If the sun shines for ever?

Jump to Last Post 1-4 of 4 discussions (4 posts)
  1. Tamilarasan123 profile image39
    Tamilarasan123posted 6 years ago

    If the sun shines for ever?

    for a long time sun have shinning if you think how much long it can shine


  2. scottcgruber profile image75
    scottcgruberposted 6 years ago

    The sun will not shine forever, but it will shine for quite a long time. In around 5 billion years, the sun will begin to run out of hydrogen fuel in its core and will become a red giant, swelling to approximately the size of Earth's orbit. For the next hundred million years or so it will fuse helium instead of hydrogen, then eject its swollen outer layers of matter and collapse to form a white dwarf. This white dwarf should continue to fuse carbon and oxygen for hundreds of billions if not trillions of years before finally exhausting all of its fuel and becoming a black dwarf.

    So the answer is yes, but it's not something you have to worry about for a few trillion years.

  3. JKenny profile image94
    JKennyposted 6 years ago

    Yep, Scott's right. The Sun is a star, and no Star lasts forever. But its not something we have to worry about on our measure of time.

  4. lone77star profile image83
    lone77starposted 6 years ago

    No star will burn forever. Why? Because no fuel source is infinite. Like a log burning on a fireplace, the log provides a goodly amount of warmth only so long as there remains fuel, oxygen and heat. The sun's heat comes not from chemical burning, but from nuclear fusion -- nuclear explosions.

    The sun "burns" hydrogen to form helium. This process of fusion gives off excess energy. Later, when the sun's core runs out of this fuel, the sun will start to collapse because of gravity and the reduced heat from the failing core. But collapsing produces heat from compression (like the compression of air being pumped into a tire makes the tire hot). Over time, the heat from compression becomes great enough to cause helium to start fusing ("burning") to form heavier elements, like carbon.

    Helium burns far hotter, so this pushes more energetically against gravity than did hydrogen, making the sun far larger. But being larger, the surface is now much farther from the source of heat energy and thus cooler, making it redder in color. That will happen in about 5 billion years as Scott says.

    But perhaps far more important for us on Earth is the steadiness of the sun's output. Over the next billion years, the sun will become warm enough to wipe out all life on Earth and eliminate the oceans. Earth will become a dry desert long before the sun becomes a red giant. Still, this is so far in the future, humanity will have plenty of time to leave Earth, if it chooses to do so.

    Even though, as Scott points out, the sun will continue to give off light for trillions of years, only a small window of that span of time will remain usable for humanity and the life on this world.


This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

Show Details
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)