Red Giants红巨星
For stars of less than 4 solar masses, hydrogen burn-up at the center triggers expansion to the red giant phase. 对于质量小于4个太阳质量的恒星，中心的氢燃烧引发膨胀，进入红巨星阶段。
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Red Giant Phase of Our Sun我们的太阳的红巨星阶段
From observations of numerous other stars which appear to be similar to our Sun, it is anticipated that the Sun will eventually move upward and to the right of its current position on the main sequence and enter a red giant phase. The final stage of our Sun is anticipated to be as a white dwarf. . 从观测到许多其他类似太阳的恒星，预计太阳最终会向上和向右移动到主序带上的当前位置之上，并进入红巨星阶段。太阳的最终阶段预计会成为白矮星。
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