The Star Named Circini Has the Spectral Type and Luminosity

question 25

Multiple Choice

The star named Circini has the spectral type and luminosity class of O 8.5 V.Based on this information,how does Circini compare to the Sun?

• A)Circini is cooler and larger than the Sun.
• B)Circini is cooler and smaller than the Sun.
• C)Circini is hotter and more luminous than the Sun.
• D)Circini is hotter and less luminous than the Sun.