IMG_4859

Name: The PIeiades 2. Which two stellar properties do we want to observe in order to plot the Pleaides stars in an ‘ HR Diagram? X-axis: Cdo/ Y-axis: W\[/\U\\(\\\(\\\L Some of the stars we will be observing in the Pleiades are so dim that they are not well studied, and the information in the star catalogs does not contain all of their intrinsic properties, but will contain information on how the stars appear to us on Earth. 3. Barring interstellar and atmospheric extinction, what two factors influence the apparent brightness of a star? (Refer to the luminosity lab for a reminder if necessary.) - ST o it Because all of the stars within the Pleiades cluster reside relatively close to one another, we can assume that they all lie the same distance away from us. 4. |If Star A appears brighter than Star B, yet they are both the same distance away from us and in the same direction, what must be true? ,}\m)m i P CloSkr 6nd Sk 115 e, NOYWST e A\prWis Using this assumption, it is acceptable to observe the apparent magnitudes of the stars in the Pleiades and plot them on an HR diagram, rather than their absolute magnitudes, because any difference in apparent magnitudes is due to a difference in their absolute magnitudes and not due to a difference in their distance from us. 70