The brightness of a star is called its Absolute magnitude (M). The equation M = a + 5 - 5 log d is used to find the Absolute mag
nitude of a star. a represents the apparent magnitude and d is the distance, measured in a unit called parsecs, from earth. The Absolute magnitude of a star is 0.45 and the apparent magnitude is 0.009, how far is the star from earth?
Step-by-step explanation: First we distribute the -2 to a and -3 to get -2a+6=12, then subtract 6 on both sides, -2a=6, finally divide by -2 on each side to get a = -3.
.
Your answer is:
