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  • Rights: NASA Published 17 September 2009 Size: 13 KB Referencing Hub media

    As medium sized stars exhaust their hydrogen content, they expand up to 100 times their original size to become red giants. The nuclear fusion reactions occurring within a red giant are H→ He and He→ C. Our Sun will follow this path over the next 5 billion years. This red giant is Aldebaran in the constellation Taurus.

    Acknowledgement: NASA

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