It’s easy to tell that some stars in the sky are brighter than others.How much brighter are they,though?And why are they brighter?

2-1Astronomy103Lab#5PHOTOMETRYOFSTARSINCLUSTERSIt’seasytotellthatsomestarsintheskyarebrighterthanothers.Howmuchbrighterarethey,though?Andwhyaretheybrighter?Ifyoulookmoreclosely,perhapswithbinocularsoratelescope,differentstarscanalsobedifferentcolors–theycanrangefromwhitetobluetoyellowtored.Whatcreatesthosedifferences?Inthislabexercise,youwilllearnhowtointerpretandanalyzephotometricmeasurementsofstars,firstindividuallyandthenaspopulationsofstarsinclusters.