deletions | additions       diff --git a/The_Virgo_cluster_is_so__.tex b/The_Virgo_cluster_is_so__.tex  index 7a37a51..ede5f84 100644  --- a/The_Virgo_cluster_is_so__.tex  +++ b/The_Virgo_cluster_is_so__.tex 
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There isn't really a good answer, the most you can do is be  self-consistent.  What distance do you get? A good estimate is \~ \sim  55 Mpc, but don't worry if your answer is far from this, it is a very difficult measurement.  Each student in the group should do their own measurements and you should compare the   results of each group member.