There are two main theories concerning massive star formation, accretion and merger.

目前大质量恒星形成的理论主要有两种，即吸积说和并合说。

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Massive star formation and star formation in star clusters will be very important in the future work.

未来的观测和研究重点在于：大质量恒星形成以及星团环境中的恒星形成。

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Star clusters like NGC 3603 provide important clues to understanding the origin of massive star formation in the early, distant universe.

NGC3603星云给了我们一个重要的提示，让我们明白了星团在早期，遥远的宇宙里形成的原始状态。

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Astronomers think the cosmic bullets were ejected from deep within the nebula, likely propelled by strong winds expelling gas at supersonic speeds from a region of massive star formation outside, and below, this image's field-of-view.

MSN: Cosmic 'bullets' slam Orion nebula in dazzling photo

Some astronomers argue that if a star gets too massive, it will disrupt the planetary formation process.

FORBES: Astronomers Locate Massive 'Super-Jupiter' Around Giant Star