deletions | additions       diff --git a/The_basic_idea_of.tex b/The_basic_idea_of.tex  index 810e9a8..ba5a187 100644  --- a/The_basic_idea_of.tex  +++ b/The_basic_idea_of.tex 
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To find the coordinates of the stars we'll use {\tt rimcurs}. Start the task by  typing   \begin{verbatim} {\color{red}\begin{verbatim}  cl> rimcurs > coord.lst  \end{verbatim} \end{verbatim}}  %{\tt rimcurs > coord.lst}.   This will direct the output to file   {\tt coord.lst}. Place the cursor over the centre of the star and hit