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| Description: The Sun Today and as a Giant (a) In about 5 billion years, when the Sun expands to become a giant, its diameter will increase a hundredfold from what it is now, while its core becomes more compact. Today, the Sun’s energy is produced in a hydrogen-fusing core whose diameter is about 200,000 km. When the Sun becomes a giant, it will draw its energy from a hydrogen-fusing shell that surrounds a compact helium-rich core. The helium core will have a diameter of only 30,000 km. The Sun’s diameter will be about 100 times larger, and it will be about 2000 times more luminous as a giant than it is today Picture Stats: Views: 694 Filesize: 295.89kB Height: 900 Width: 993 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18427 |