The absolute magnitude of a star is its brightness as seen from a distance of
a) one million km.
b) one Astronomical Unit.
c) one light-year.
d) ten parsecs.
e) ten light-years.
Answer: d) ten parsecs
The absolute magnitude of a star is its brightness as seen from a distance of
a) one million km.
b) one Astronomical Unit.
c) one light-year.
d) ten parsecs.
e) ten light-years.
Answer: d) ten parsecs