on this lab worksheet i need to fill out the bottom table (the top one is already filled out). Im having trouble understanding The numbers in the first part of the chart. I know RA is right accession and DEC is declination but what I'm not understanding is why there are two different numbers for the mass and why there are 2 numbers in one column. if someone could help me fill out the first column in the bottom chart for Cygnus X-1 that would be amazing, then if you could, explain. i already know the formula for R(s) is 2GM/c^2, but I'm not quite sure how to get the mass for the above numbers. thank you very much !!(: P.S. sorry for the dark picture. I know i already have numbers in two boxes but I'm 100% sure they are incorrect so please ignore.