The Star Named Circini Has the Spectral Type and Luminosity

question 107

Multiple Choice

The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true I.Circini has a surface temperature less than the Sun.
II.Circini has a diameter that is greater than that of the Sun.
III.Circini is more luminous than the Sun.
IV.Circini is located near the upper left-hand corner in the H-R diagram.

• A)I & II
• B)II & IV
• C)II, III, & IV
• D)I, II, & III
• E)I, II, III, & IV

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