A Main-Sequence Star Is Defined as a Star

question 303

Multiple Choice

A main-sequence star is defined as a star:

• A) with a surface temperature equal to that of the Sun.
• B) in which nuclear fusion reactions generate sufficient energy to oppose further condensation of the star.
• C) whose age after birth is about 1 million years.
• D) with a luminosity precisely equal to that of the Sun.

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Definitions:

Penalty

A punishment imposed for breaking a law, rule, or contract.

Zoning Regulations

Local government laws that dictate how property in specific geographic zones can be used, affecting land use, building sizes, and the type of buildings allowed.

Non-Conforming Use Permit

A zoning variance allowing property to be used in a way that does not comply with the current zoning ordinances.

Variance

The measure of dispersion between numbers in a set, indicating how much values differ from the average.