As a planet orbits, it pulls a star back and forth.
当一颗行星绕它的轨道运行时，它能来回牵引恒星。
However, this planet, in fact, orbits in what we call the habitable zone.
然而，事实上这颗行星的轨道在我们称之为的可居住的区域。
Planet X orbits between our sun and its dark twin.
X行星轨道与太阳之间的黑暗双胞胎。
Can a planet be as large as the star that it orbits?
行星会和母恒星一样大吗？
Can a planet be as large as the star that it orbits?
行星会和母恒星一样大吗？
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