diff --git a/astronomy/sistema_terra-luna/sistema_terra-luna.tex b/astronomy/sistema_terra-luna/sistema_terra-luna.tex
index 4285d29..a4909d8 100755
--- a/astronomy/sistema_terra-luna/sistema_terra-luna.tex
+++ b/astronomy/sistema_terra-luna/sistema_terra-luna.tex
@@ -33,13 +33,14 @@
 		partial ellipse/.style args = {#1:#2:#3}{insert path={+ (#1:#3) arc (#1:#2:#3)}},
 	}
 	\begin{tikzpicture}[background rectangle/.style={fill=space},show background rectangle]
-		\tkzDefPoint(0,0){E}
-		\tkzDefPoint(3,0){Er}
+		\tkzDefPoint(0,0){O}
+		\tkzDefPoint(-7,0){E}
+		\tkzDefPoint(-4,0){Er}
 		\tkzDefPoint(15,0){L}
 		\tkzDefPoint(16,0){Lr}
 		%
 		\begin{scope}[yscale=0.5]
-			\tkzDrawCircle[color=white,ultra thick](E,L)
+			\tkzDrawCircle[color=white,ultra thick](O,L)
 		\end{scope}
 		%
 		\tkzDrawCircle[fill=earth](E,Er)
@@ -58,9 +59,7 @@
 		\tkzDrawCircle[fill=moon](L3,Lr3)
 		%
 		\node at (17.5,0) {\textcolor{white}{\fontsize{20}{21}\selectfont apogeo}};
-		\node at (-17.5,0) {\textcolor{white}{\fontsize{20}{21}\selectfont apogeo}};
-		\node at (0,9) {\textcolor{white}{\fontsize{20}{21}\selectfont perigeo}};
-		\node at (0,-9) {\textcolor{white}{\fontsize{20}{21}\selectfont perigeo}};
+		\node at (-17.5,0) {\textcolor{white}{\fontsize{20}{21}\selectfont perigeo}};
 	\end{tikzpicture}
 %
 \end{document}
\ No newline at end of file