If Vega Is Apparent Magnitude Zero, and Deneb First Magnitude

question 38

Multiple Choice

If Vega is apparent magnitude zero, and Deneb first magnitude, then

• A) Vega must be 2.5× hotter than Deneb.
• B) Deneb must be a main sequence star, and Vega a giant.
• C) Vega is about 100× brighter than Deneb.
• D) Deneb is one magnitude brighter than Vega.
• E) Vega is 2.5× brighter than Deneb.

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Definitions:

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