How to use the constellation diagram with border but without colors

Question

I like to draw the below diagram without colours but i need the borders

\documentclass{article}
\usepackage{smartdiagram}

\begin{document}

\smartdiagramset{
  planet size=2cm, 
  distance planet-text=0.1,
  distance planet-satellite=2.5cm,
  /tikz/connection planet satellite/.append style={<-}
} 
\smartdiagram[constellation diagram]{
  MaxWalkSAT,max\_tries,max\_flips,target,p, gew.Klaus
}

\end{document}

Answer 1

Like this?

\documentclass{article}
\usepackage{smartdiagram}
\tikzset{planet/.append style={
 draw=blue,thick
 },
 satellite/.append style={
 draw=red
 },
 }

\begin{document}

\smartdiagramset{
  planet size=2cm,
  planet color = none,
  distance planet-text=0.1,
  distance planet-satellite=2.5cm,
  /tikz/connection planet satellite/.append style={<-},
   satellite fill opacity=0,
}
\smartdiagram[constellation diagram]{
  MaxWalkSAT,max\_tries,max\_flips,target,p, gew.Klaus
}

\end{document}

You can remove the fill with

planet color = none,
satellite fill opacity=0

and then append the styles like

\tikzset{planet/.append style={
 draw=blue,thick
 },
 satellite/.append style={
 draw=red
 },
}

Or add directly to \smartdiagramset:

\documentclass{article}
\usepackage{smartdiagram}

\begin{document}

\smartdiagramset{
  planet size=2cm,
  planet color = none,                                   %%<<-- this 
  distance planet-text=0.1,
  distance planet-satellite=2.5cm,
  /tikz/connection planet satellite/.append style={<-},
  /tikz/planet/.append style={draw=blue,thick},          %%<<-- this 
  /tikz/satellite/.append style={draw=red},              %%<<-- this 
  satellite fill opacity=0,                              %%<<-- this 
}
\smartdiagram[constellation diagram]{
  MaxWalkSAT,max\_tries,max\_flips,target,p, gew.Klaus
}

\end{document}

The following can be done too:

\smartdiagramset{
  planet size=2cm,
  %planet color = none,
  distance planet-text=0.1,
  distance planet-satellite=2.5cm,
  /tikz/connection planet satellite/.append style={<-},
  /tikz/planet/.append style={draw=blue,thick,fill=none},
  /tikz/satellite/.append style={draw=red,fill=none},
  %satellite fill opacity=0,
}

---

One can change the shape of planets and satellites too.

\smartdiagramset{
  planet size=2cm,
  planet color = none,                                   %%<<-- this
  distance planet-text=0.1,
  distance planet-satellite=3.5cm,
  /tikz/connection planet satellite/.append style={<-},
  /tikz/planet/.append style={draw=blue,thick,rectangle,rounded corners=5mm},          %%<<-- this
  /tikz/satellite/.append style={draw=red,rectangle,rounded corners=5mm},              %%<<-- this
  satellite fill opacity=0,                              %%<<-- this
}