\begin{tikzpicture}[sketch]

%TEIL ELLIPSE DEFINIEREN
\tikzset{
    partial ellipse/.style args={#1:#2:#3}{
        insert path={+ (#1:#3) arc (#1:#2:#3)}
    }
}

%DEFINE NODES
\node[inner sep=0pt] (LUE) at (-1.2,1.5){};	%left_upper_ellipse
\node[inner sep=0pt] (RUE) at (1.2,1.5){};	%right_upper_ellipse
\node[inner sep=0pt] (LDE) at (-1.2,-1.5){};	%left_down_ellipse
\node[inner sep=0pt] (RDE) at (1.2,-1.5){};	%right_down_ellipse
 
\node[inner sep=0pt](OLUE) at (-1.5,0.75){};
\node[inner sep=0pt](ORUE) at (1.5,0.75){};
\node[inner sep=0pt](OLDE) at (-1.5,-0.75){};
\node[inner sep=0pt](ORDE) at (1.5,-0.75){};

 
 %DEFINE PATHS
\path[name path=LD](LUE)--(RDE);			%LeftDownDiagonal
\path[name path=RD](RUE)--(LDE);			%RightDownDiagonal

	%innere Ellipse oben
	\path[name path=ellipse1uh](0,1.49) [partial ellipse=180:360:1.2cm and   	.15cm]; %Obere Ellipse, kante untere hälfte
	
	%äußere  Ellipse oben
	\path[name path=ellipse2uh](0,0.75) [partial ellipse=180:360:1.5cm and 0.2cm];
	
	%äußere Ellipse unten
	\path[name path=ellipse2dh](0,-0.75) [partial ellipse=180:360:1.5cm and 0.2cm];
	
	%Äußere ellipse   	oben, kante untere Hälfte
	
	

%INTERSECTION NODES
\path [name intersections={of=RD and LD,by=C}];
\path[name intersections={of=LD and ellipse2uh, by=IsLe2}];
\path[name intersections={of=RD and ellipse2uh, by=IsRe2}];

\path[name intersections={of=LD and ellipse2dh, by=IsLe2d}];

\path[name intersections={of=RD and ellipse2dh, by=IsRe2d}];




%Äußere Volle Ellipse oben
\draw[left color=black, right color=darkgray, middle color=white](0,0.75) ellipse(1.5cm and 0.2cm);

%Weiße Hilfsebene
\fill[white](0,0)--(-1.2,1.5])--(1.2,1.5)--(0,0);



%Gestrichelter bogen oben
\draw[dashed, opacity=0.3](0,0.75)[partial ellipse=180:0:1.5cm and 0.2cm];

%Bogen über weißer Hilfsebene
\draw(0,0.75)[partial ellipse=180:360:1.5cm and 0.2cm];

%Crossed Lines
\draw(LUE)--(RDE);
\draw(RUE)--(LDE);


%Äußerer Zylinder
\draw[bend left=30](OLUE) to (OLDE);
\draw(0,-0.74) [partial ellipse=180:360:1.487cm and 0.2cm];
\draw[dashed, opacity=0.3](0,-0.74) [partial ellipse=180:0:1.487cm and 0.2cm];
\draw[bend right=30](ORUE) to (ORDE);


%Innere volle Ellipse oben
\draw[left color=black, right color=darkgray, middle color=white](0,1.49) ellipse(1.187cm and 0.15cm);

\draw(0,-1.49) [partial ellipse=180:360:1.187cm and 0.15cm]; 

\draw[dashed, opacity=0.3](0,-1.49) [partial ellipse=180:0:1.187cm and 0.15cm]; 

\draw[->, dodgerblue](0,1.35)--(0,2.0)node[label=above: Time]{};
\draw[dodgerblue, dashed, opacity=0.5](0,1.33)--(0,-1.49);
\draw[dodgerblue](0,-1.65)--(0,-1.9);
\draw[dodgerblue](-1.7,0)--(-1.28,0);
\draw[dashed, dodgerblue, opacity=0.5](-1.265,0)--(1.265,0);
\draw[dodgerblue,->](1.28,0)--(1.7,0)node[label=right: Space]{};
\draw[dodgerblue, dashed, opacity=0.5](0,0)--(200:1.25)node(h1){};
\draw[dodgerblue, dashed, opacity=0.5](0,0)--(200:-1.25)node(h2){};
\draw[dodgerblue](200:-1.47)--++(200:-0.4);
\draw[dodgerblue, ->](h1)--++(200:0.75);

\draw[awesome, bend left=40, ->](1.3,0.2)node[label=right:$y$]{}circle(0.03) to (-1.3,-0.2)node[label=left:$-y$]{}circle(0.03);
%\draw[awesome,->, bend left=40](1.3,0.2)to(-1.3,-0.2);
\draw[awesome, opacity=1.0, dashed](1.3,0.2)--(-1.3,-0.2);

\fill(C) circle(0.06);

\node[awesome] at (1.,-0.3){$\Lambda^*$};
\node at (2,1.6){Light cone};
\draw[<->, bend left=20](-1.7,0.7) to (-1.5,0.1)node[label={[label distance=0cm]160:Boosts}]{};
\draw[<->, bend left=20](-1.7,0.8) to (-1.2,1)node[label={[label distance=0cm]120:Rotations}]{};

\end{tikzpicture}