This Question: 1 pt 4 of 7
This Quiz: 7 pts possible
A boat traveled downstream a distance of 72 mi and then came right back. If the speed of the current was 5 mph and the total trip took 6 hours, find the average speed
of the boat relative to the water.

Although a star might look brighter than the Sun, a comparison of its absolute magnitude might help prove that they have the same real brightness.
Absolute magnitude is a concept that compares the absolute brightness of celestial objects. The absolute magnitude of an object is defined as the apparent magnitude it would have if it were viewed at a standard distance of 10 parsecs (32.6 light-years) with no dimming of its light. The more luminous an object, the smaller the numerical value of its absolute magnitude.