You might also like
Star in a Box Explore the lifecycle of stars with this interactive app
Educational Resources Our collection of online activites, print resources, and observing tips.
Use the relationship between an object's apparent magnitude and absolute magnitude m - M = 5 log(d) - 5 to answer the following questions:
1. Suppose you were viewing the Sun from a planet orbiting another star 40 pc away. What would the Sun's apparent magnitude be? (The Sun has absolute magnitude M = +4.8)
2. Star A and star B are both equally bright as seen from Earth, but A is 60 pc away while B is 15 pc away. Which star is intrinsically brighter? By how much?
3. Star C has an absolute magnitude of 0.0, and an apparent magnitude of +14.0. What is the distance to star C?
1. The Sun's apparent magnitude would be +7.8.
2. Star A is 16 times brighter than star B.
3. 6309.6 pc (or 103.8pc)