Answer: Two characteristics define brightness: luminosity and magnitude. ... The size of the star and its surface temperature determine its luminosity. Apparent magnitude of a star is its perceived brightness, factoring in size and distance, while absolute magnitude is its true brightness irrespective of its distance from earth.
Explanation:
<u><em>Answer:</em></u>
<u><em>B is the correct answer</em></u>
<u><em>Explanation:</em></u>
<u><em>1- When you are recording what you are seeing it is a process called observation. Observation is used when you want to look at something.</em></u>
<u><em> Tyler is making a plan to test what kind of birdseed the birds at the park eat the fastest. This is called an experiment. Experiment is when you are taking your hypothesis and running tests on your hypothesis</em></u>
<u><em>Hope this helped :)</em></u>
