The standard theory of planet formation holds that no planet that large could be formed so close to a star, leading to the suggestion that the body is a companion star.

行星形成的标准理论认为，没有一颗如此大的行星能在如此靠近恒星的地方形成，因此才有人推测该天体是一颗伴星。

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An unseen companion star, nicknamed "Nemesis," may be sending comets towards Earth.

一颗看不见的伴星，绰号“复仇者(Nemesis)，可能会导致彗星撞击地球。”

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Did the star ignite helium at the core, swallow a planet, or swallow a companion star?

星体燃烧了核内的氦，吞并了行星或伴星吗？

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More than 60% of the stars in the Milky Way have a companion star around which they orbit.

ECONOMIST: Planetary science: When a world is born | The

HR4796A does have one other particularly intriguing feature: a companion star.

ECONOMIST: Dusty genesis

By then, the outer layers of its companion star have been completely torn away and the accretion disc has vanished: millisecond pulsars do not have accretion discs.

ECONOMIST: The dizziest, giddiest stars