hey i need help! We are doing a lab on the above title and I have no idea how to do it. So there are few questions i wanted to know to ace this lab. lol i will really appreciate it if someone can help me. - Describe the differences between the two sets of data. Is the observed speeds explained by the equation v = √Gmg/ r ? Justify your answer -Briefly describe some of the methods astronomers use to estimate the mass of a galaxy, its radius and the value of G. Please, it will be really helpful if someone can help me!