deletions | additions       diff --git a/subsectionAims__To_u.tex b/subsectionAims__To_u.tex  index 0cd2164..7f80233 100644  --- a/subsectionAims__To_u.tex  +++ b/subsectionAims__To_u.tex 
...
In this practical, you will use observations of two galaxy clusters to  estimate several key cosmological parameters. The observations were  made with the 1.2 metre  UK Schmidt Telescope at Siding Spring Observatory in NSW; photos of this telescope are displayed in the lab.  Galaxies are attracted toward one another due to the force of gravity,