There Are Several Mechanisms That Can Trigger Star Formation in a Cold

question 157

Multiple Choice

There are several mechanisms that can trigger star formation in a cold, dark nebula. In each mechanism, the key to star formation is

• A) bathing the cold, dark nebula in ultraviolet radiation and sweeping away some of the colder material.
• B) compressing the gas and dust so that gravitation will overcome the gas pressure.
• C) heating the gas so that gas pressure will overcome gravitation.
• D) subjecting the dark nebula to an intense magnetic field so that supersonic jets will form.

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