tikzdraw/astronomy/sistema_terra-luna/sistema_inerziale.tex

\documentclass{standalone}
%
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
%
\usepackage{tkz-euclide}
\usetkzobj{all}
%
\usepackage{dsfont}
%
\usepackage{xcolor}
%
\definecolor{space}{HTML}{0A2543}
\definecolor{earth}{HTML}{0089FA}
\definecolor{land}{HTML}{309347}
\definecolor{moon}{HTML}{AFAFAF}
\definecolor{craterm}{HTML}{616060}
\definecolor{linem}{HTML}{DBDBDB}
%
\usepackage{amsmath}
%
\usepackage{fontspec}
\setmainfont{Open Dyslexic}
%
\title{Maree}
\begin{document}
	\tikzset{
		partial ellipse/.style args = {#1:#2:#3}{insert path={+ (#1:#3) arc (#1:#2:#3)}},
	}
	\begin{tikzpicture}[>={[inset=0,angle'=27]Stealth}]
		\node at (12,6.5) {\textcolor{black}{\fontsize{15}{16}\selectfont Sistema di riferimento inerziale}};
		\begin{scope}[scale=0.4]
			\draw [color=craterm, fill=moon, ultra thick] (6.5,0) circle (4.5cm);
			\foreach \x in {1,...,5}
			\draw [color=craterm, ultra thick, rotate around={72*\x:(6.5,0)}] (6.5,0) -- (6.5,2);
			\foreach \x in {1,3,...,20}
			\draw [color=craterm, ultra thick, rotate around={18*\x:(6.5,0)}] (6.5,0) -- (6.5,1.2);
			\foreach \x in {2,6,...,18}
			\draw [color=craterm, ultra thick, rotate around={18*\x:(6.5,0)}] (6.5,0) -- (6.5,0.9);
			\draw[fill=craterm, ultra thick] (6.5,0) circle (0.5cm);
			%down-sx
			\draw (3.3,-2.5) [rotate around={-45:(3.3,-2.5)}, color=linem,ultra thick,partial ellipse=20:160:1.5 and 0.5];
			\foreach \x in {0.01,0.02,...,0.1}
			\draw (3.3+\x,-2.5-\x) [rotate around={-45:(3.3,-2.5)}, color=craterm,ultra thick,partial ellipse=20:160:1.5 and 0.5];
			%down-dx
			\draw (9.7,-2.5) [rotate around={45:(9.7,-2.5)}, color=linem,ultra thick,partial ellipse=20:160:1 and 0.3];
			\foreach \x in {0.01,0.02,...,0.1}
			\draw (9.7+\x,-2.5-\x) [rotate around={45:(9.7,-2.5)}, color=craterm,ultra thick,partial ellipse=20:160:1 and 0.3];
			%up-sx
			\draw (3.5,3.2) [rotate around={45:(3.5,3.2)}, color=linem,ultra thick,partial ellipse=180:360:0.5 and 0.3];
			\foreach \x in {0.01,0.02,...,0.1}
			\draw (3.5+\x,3.2-\x) [rotate around={45:(3.5,3.2)}, color=craterm,ultra thick,partial ellipse=180:360:0.5 and 0.3];
			%up-dx shadow
			\draw (9.5,3) [rotate around={-50:(9.5,3)}, color=linem,ultra thick,partial ellipse=180:360:0.9 and 0.7];
			\foreach \x in {0.01,0.02,...,0.1}
			\draw (9.5+\x,3-\x) [rotate around={-50:(9.5,3)}, color=craterm,ultra thick,partial ellipse=180:360:0.9 and 0.7];
		\end{scope}
		%
		\begin{scope}[shift={(20,0)}]
			\begin{scope}
				\tkzDefPoint(0,0){O}
				\tkzDefPoint(5.5,0){E}
				\tkzDrawCircle[fill = earth](O,E)
				\tkzClipCircle(O,E)
				\tkzDefPoint(0.6,0.4){A}
				\tkzDefPoint(-0.6,0.4){B}
				%
				\tkzDefShiftPoint[A](-0.2,0.3){A1}
				\tkzDefShiftPoint[A1](0,-0.25){A2}
				\tkzDefShiftPoint[B](-0.2,0.3){B1}
				\tkzDefShiftPoint[B1](0,-0.25){B2}
				%
				% lands
				%
				\fill [land] plot [smooth, tension=0.9] coordinates { (5,5) (4,4) (4.5,0) (4.5,-4) (4.3,-5.5) (6,0) (5,5) };
				\begin{scope}[xscale=3]
				\fill [land] (0,-5.5) circle (1cm);
				\end{scope}
				\fill [land] plot [smooth, tension=0.9] coordinates { (-2,0.5) (0,1) (3,0.5) (2.2,-1.2) (0.3,-3) (-0.1,-2) (-2.5,-0.7) (-2,0.5) };
				\fill [land] plot [smooth, tension=0.9] coordinates { (0,4) (2,3.2) (2.2,1.6) (1.8,1) (1.5,1.8) (0.1,2) (-1.2,1.7) (-2.3,2) (-2.4,3.5) (0,4) };
				%
				% clouds
				%
				\draw [line width=5mm, color=white] (-5.5,4.5) -- (-1.5,4.5);
				\draw [line width=5mm, color=white] (-5.5,4.1) -- (-1.2,4.1);
				\fill [white] (-1.5,4.55) circle (0.2cm);
				\fill [white] (-1.2,4.1) circle (0.25cm);
				%
				\draw [line width=5mm, color=white] (-5.5,1.1) -- (-3.5,1.1);
				\draw [line width=5mm, color=white] (-5.5,0.7) -- (-3.2,0.7);
				\fill [white] (-3.5,1.15) circle (0.2cm);
				\fill [white] (-3.2,0.7) circle (0.25cm);
				%
				\draw [line width=5mm, color=white] (-5.5,-4.1) -- (-1.5,-4.1);
				\draw [line width=5mm, color=white] (-5.5,-4.5) -- (-1.2,-4.5);
				\draw [line width=4mm, color=white] (-2.3,-4.8) -- (-1.6,-4.8);
				\fill [white] (-1.5,-4.05) circle (0.2cm);
				\fill [white] (-1.2,-4.5) circle (0.25cm);
				\fill [white] (-1.6,-4.8) circle (0.2cm);
				\fill [white] (-2.3,-4.8) circle (0.2cm);
				%
				\draw [line width=5mm, color=white] (3,-2.5) -- (5.5,-2.5);
				\draw [line width=5mm, color=white] (2.5,-2.9) -- (5.5,-2.9);
				\draw [line width=4mm, color=white] (3.5,-3.2) -- (5,-3.2);
				\fill [white] (3,-2.45) circle (0.2cm);
				\fill [white] (2.5,-2.9) circle (0.25cm);
				\fill [white] (3.5,-3.2) circle (0.2cm);
				%
				\begin{scope}[yscale=0.5]
				\foreach \i in {1,2,...,6}{
					\pgfmathsetmacro{\x}{(rand*0.2 + 1)*12-12}
					\pgfmathsetmacro{\y}{(rand*0.5 + 1)*10-10}
					\pgfmathsetmacro{\opacVal}{rand*0.5+1}
					\fill[white] (\x,\y) circle (0.5cm);
				}
				\end{scope}
			\end{scope}
			\draw [->,ultra thick] (O) -- (-2,0);
			\node at (0,0.4) {\textcolor{black}{\fontsize{15}{16}\selectfont $\vec a_C$}};
			\draw [->,ultra thick] (5.5,0) -- (4.3,0);
			\node at (6,0.4) {\textcolor{black}{\fontsize{15}{16}\selectfont $\vec a_B$}};
			\draw [->,ultra thick] (-5.5,0) -- (-8.2,0);
			\node at (-6.5,0.4) {\textcolor{black}{\fontsize{15}{16}\selectfont $\vec a_A$}};
			%
		\end{scope}
		%
	\end{tikzpicture}
%
\end{document}