Alpha Mensae is a star that has an apparent magnitude m = +5.08 and an absolute magnitude M_V = +5.05. How far away is Alpha Mensae from Earth?
A. Much farther away than 10 parsecs.
B. A little farther away than 10 parsecs.
C. Exactly 10 parsecs away.
D. Closer than 10 parsecs away.
Answer:B
Alpha Mensae is a star that has an apparent magnitude m = +5.08 and an absolute magnitude M_V = +5.05. How far away is Alpha Mensae from Earth?
A. Much farther away than 10 parsecs. B. A little farther away than 10 parsecs. C. Exactly 10 parsecs away. D. Closer than 10 parsecs away.