diff --git a/src/main/angular/src/app/Unit.ts b/src/main/angular/src/app/Unit.ts
new file mode 100644
index 0000000..9d8e2ba
--- /dev/null
+++ b/src/main/angular/src/app/Unit.ts
@@ -0,0 +1,50 @@
+import {formatNumber} from "@angular/common";
+
+export const PREFIXES_POSITIVE: string[] = ['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y', 'R', 'Q'];
+export const PREFIXES_NEGATIVE: string[] = ['', 'm', 'µ', 'n', 'p', 'f', 'a', 'z', 'y', 'r', 'q'];
+
+export function applyPrefixUnit(value: number, unit: string, divisor: number, prefix: string, digits: number, locale: string) {
+  if (isNaN(value) || isNaN(divisor) || divisor === 0) {
+    return '-';
+  }
+  const format = '0.' + digits + '-' + digits;
+  return formatNumber(value / divisor, locale, format) + ' ' + prefix + unit;
+}
+
+export class Unit {
+
+  private _divisor: number = 1;
+
+  private _prefix: string = "";
+
+  constructor(
+    readonly unit: string,
+    readonly locale: string,
+  ) {
+    // -
+  }
+
+  get divisor(): number {
+    return this._divisor;
+  }
+
+  get prefix(): string {
+    return this._prefix;
+  }
+
+  public update(value: number) {
+    const prefixGroup = Math.floor(Math.floor(Math.log10(value)) / 3);
+    if (prefixGroup <= 0) {
+      this._prefix = PREFIXES_NEGATIVE[-prefixGroup];
+    } else {
+      this._prefix = PREFIXES_POSITIVE[prefixGroup];
+    }
+    const exponentFromGroup = prefixGroup * 3;
+    this._divisor = Math.pow(10, exponentFromGroup);
+  }
+
+  applyPrefixUnit(value: number): string {
+    return applyPrefixUnit(value, this.unit, this.divisor, this.prefix, 2, this.locale);
+  }
+
+}
diff --git a/src/main/angular/src/app/app.config.ts b/src/main/angular/src/app/app.config.ts
index 0460e6a..d143aad 100644
--- a/src/main/angular/src/app/app.config.ts
+++ b/src/main/angular/src/app/app.config.ts
@@ -1,8 +1,17 @@
-import {ApplicationConfig, provideZoneChangeDetection} from '@angular/core';
+import {ApplicationConfig, LOCALE_ID, provideZoneChangeDetection} from '@angular/core';
 import {provideRouter} from '@angular/router';
 
 import {routes} from './app.routes';
+import {registerLocaleData} from "@angular/common";
+import localeDe from '@angular/common/locales/de';
+import localeDeExtra from '@angular/common/locales/extra/de';
+
+registerLocaleData(localeDe, 'de-DE', localeDeExtra);
 
 export const appConfig: ApplicationConfig = {
-  providers: [provideZoneChangeDetection({eventCoalescing: true}), provideRouter(routes)]
+  providers: [
+    {provide: LOCALE_ID, useValue: 'de-DE'},
+    provideZoneChangeDetection({eventCoalescing: true}),
+    provideRouter(routes),
+  ]
 };
diff --git a/src/main/angular/src/app/app.routes.ts b/src/main/angular/src/app/app.routes.ts
index 452fabc..07b9607 100644
--- a/src/main/angular/src/app/app.routes.ts
+++ b/src/main/angular/src/app/app.routes.ts
@@ -1,9 +1,9 @@
 import {Routes} from '@angular/router';
-import {SolarComponent} from './solar/solar.component';
+import {SolarSystemComponent} from './solar-system/solar-system.component';
 import {VoltageDropComponent} from "./voltage-drop/voltage-drop.component";
 
 export const routes: Routes = [
-  {path: 'Solar', component: SolarComponent},
+  {path: 'Solar', component: SolarSystemComponent},
   {path: 'VoltageDrop', component: VoltageDropComponent},
   {path: '**', redirectTo: '/Solar'},
 ];
diff --git a/src/main/angular/src/app/solar-system/SOLAR_SYSTEM.ts b/src/main/angular/src/app/solar-system/SOLAR_SYSTEM.ts
new file mode 100644
index 0000000..1ee354e
--- /dev/null
+++ b/src/main/angular/src/app/solar-system/SOLAR_SYSTEM.ts
@@ -0,0 +1,43 @@
+import {SolarSystemBody} from "./SolarSystemBody";
+
+export const SUN = new SolarSystemBody('Sonne', 1392700000, 0, 1.989e33, []);
+
+export const MERCURY = new SolarSystemBody('Merkur', 4879400, 57.9, 3.285e26, []);
+
+export const VENUS = new SolarSystemBody('Venus', 12104000, 108.2, 4.867e27, []);
+
+export const EARTH = new SolarSystemBody('Erde', 12742000, 149.6, 5.972e27, [
+  new SolarSystemBody('Mond', 3474800, 0, 7.342e25, [])
+]);
+
+export const MARS = new SolarSystemBody('Mars', 6779000, 228, 6.39e26, [
+  new SolarSystemBody('Phobos', 22533, 0, 1.0659e19, []),
+  new SolarSystemBody('Deimos', 12400, 0, 1.4762e18, [])
+]);
+
+export const JUPITER = new SolarSystemBody('Jupiter', 139820000, 778.5, 1.898e30, [
+    new SolarSystemBody('Io', 3643000, 0, 8.932e25, []),
+    new SolarSystemBody('Europa', 3121600, 0, 4.799e25, []),
+    new SolarSystemBody('Ganymede', 5262400, 0, 1.4819e26, []),
+    new SolarSystemBody('Callisto', 4820600, 0, 1.0759e26, [])
+  ]
+);
+
+export const SATURN = new SolarSystemBody('Saturn', 116460000, 1432, 5.683e29, [
+  new SolarSystemBody('Titan', 5149460, 0, 1.3452e26, []),
+  new SolarSystemBody('Enceladus', 504200, 0, 1.08e23, [])
+]);
+
+export const URANUS = new SolarSystemBody('Uranus', 50724000, 2867, 8.681e28, [
+  new SolarSystemBody('Miranda', 471600, 0, 6.59e22, []),
+  new SolarSystemBody('Ariel', 1157800, 0, 1.35e24, []),
+  new SolarSystemBody('Umbriel', 1169400, 0, 1.17e24, []),
+  new SolarSystemBody('Titania', 1576800, 0, 3.42e24, []),
+  new SolarSystemBody('Oberon', 1522800, 0, 3.01e24, [])
+]);
+
+export const NEPTUNE = new SolarSystemBody('Neptun', 49244000, 4515, 1.024e29, [
+  new SolarSystemBody('Triton', 2706800, 0, 2.14e25, [])
+]);
+
+export const BODIES: SolarSystemBody[] = [SUN, MERCURY, VENUS, EARTH, MARS, JUPITER, SATURN, URANUS, NEPTUNE];
diff --git a/src/main/angular/src/app/solar-system/SolarSystemBody.ts b/src/main/angular/src/app/solar-system/SolarSystemBody.ts
new file mode 100644
index 0000000..a13d2bc
--- /dev/null
+++ b/src/main/angular/src/app/solar-system/SolarSystemBody.ts
@@ -0,0 +1,21 @@
+export class SolarSystemBody {
+
+  readonly realDistanceMeters: number;
+
+  modelMeters: number;
+
+  modelDistance: number;
+
+  constructor(
+    readonly name: string,
+    readonly realMeters: number,
+    realDistanceMioKm: number,
+    readonly massKg: number,
+    readonly moons: SolarSystemBody[],
+  ) {
+    this.realDistanceMeters = realDistanceMioKm * 1000 * 1000 * 1000;
+    this.modelMeters = realMeters;
+    this.modelDistance = realDistanceMioKm;
+  }
+
+}
diff --git a/src/main/angular/src/app/solar/solar.component.html b/src/main/angular/src/app/solar-system/solar-system.component.html
similarity index 54%
rename from src/main/angular/src/app/solar/solar.component.html
rename to src/main/angular/src/app/solar-system/solar-system.component.html
index 7e3c997..7d7af58 100644
--- a/src/main/angular/src/app/solar/solar.component.html
+++ b/src/main/angular/src/app/solar-system/solar-system.component.html
@@ -9,23 +9,25 @@
       <div class="tileContent">
         <table>
           <tr>
-            <td class="name">Name</td>
-            <td class="real">Realität</td>
-            <td class="model" colspan="2">Skaliert</td>
+            <th>Name</th>
+            <th>Realität</th>
+            <th>Skaliert</th>
           </tr>
-          <tr *ngFor="let mass of masses">
+          <tr *ngFor="let mass of BODIES">
             <td class="name">{{ mass.name }}</td>
-            <td class="real">{{ doPrefix(mass.realMeters, 'm', 1000, 'k', 0) }}</td>
-            <td class="model" colspan="2">{{ unit(mass.modelMeters, 'm') }}</td>
+            <td class="real">{{ applyPrefixUnit(mass.realMeters, 'm', 1000, 'k', 0, locale) }}</td>
+            <td class="model">{{ diameterUnit.applyPrefixUnit(mass.modelMeters) }}</td>
           </tr>
+        </table>
+        <table>
           <tr>
             <th>
-              <select [(ngModel)]="pivot">
-                <option *ngFor="let mass of masses" [ngValue]="mass">{{ mass.name }}</option>
+              <select [(ngModel)]="pivot" (ngModelChange)="update()">
+                <option *ngFor="let mass of BODIES" [ngValue]="mass">{{ mass.name }}</option>
               </select>
             </th>
-            <td colspan="2">
-              <input type="number" [(ngModel)]="pivot.modelMeters" (ngModelChange)="ngOnInit()">
+            <td>
+              <input type="number" [(ngModel)]="pivot.modelMeters" (ngModelChange)="update()">
             </td>
             <td class="unit">
               &nbsp;m
diff --git a/src/main/angular/src/app/solar/solar.component.less b/src/main/angular/src/app/solar-system/solar-system.component.less
similarity index 86%
rename from src/main/angular/src/app/solar/solar.component.less
rename to src/main/angular/src/app/solar-system/solar-system.component.less
index e41231e..82f7970 100644
--- a/src/main/angular/src/app/solar/solar.component.less
+++ b/src/main/angular/src/app/solar-system/solar-system.component.less
@@ -12,14 +12,17 @@ td {
 .name {
   text-align: left;
   font-weight: bold;
+  width: 33.33%;
 }
 
 .real {
   text-align: right;
+  width: 33.33%;
 }
 
 .model {
   text-align: right;
+  width: 33.33%;
 }
 
 input {
diff --git a/src/main/angular/src/app/solar-system/solar-system.component.ts b/src/main/angular/src/app/solar-system/solar-system.component.ts
new file mode 100644
index 0000000..8e0a7a3
--- /dev/null
+++ b/src/main/angular/src/app/solar-system/solar-system.component.ts
@@ -0,0 +1,46 @@
+import {Component, Inject, LOCALE_ID, OnInit} from '@angular/core';
+import {DecimalPipe, NgForOf} from "@angular/common";
+import {FormsModule} from "@angular/forms";
+import {SolarSystemBody} from "./SolarSystemBody";
+import {BODIES, JUPITER} from "./SOLAR_SYSTEM";
+import {applyPrefixUnit, Unit} from "../Unit";
+
+@Component({
+  selector: 'app-solar-system',
+  standalone: true,
+  imports: [
+    NgForOf,
+    DecimalPipe,
+    FormsModule,
+  ],
+  templateUrl: './solar-system.component.html',
+  styleUrl: './solar-system.component.less'
+})
+export class SolarSystemComponent implements OnInit {
+
+  protected readonly applyPrefixUnit = applyPrefixUnit;
+
+  protected readonly BODIES = BODIES;
+
+  protected pivot: SolarSystemBody = JUPITER;
+
+  protected diameterUnit: Unit;
+
+  constructor(
+    @Inject(LOCALE_ID) readonly locale: string,
+  ) {
+    this.diameterUnit = new Unit('m', this.locale);
+  }
+
+  ngOnInit() {
+    this.pivot.modelMeters = 0.18;
+    this.update();
+  }
+
+  protected update() {
+    const scale = this.pivot.modelMeters / this.pivot.realMeters;
+    BODIES.filter(m => m != this.pivot).forEach(m => m.modelMeters = scale * m.realMeters);
+    this.diameterUnit.update(this.pivot.modelMeters);
+  }
+
+}
diff --git a/src/main/angular/src/app/solar/Mass.ts b/src/main/angular/src/app/solar/Mass.ts
deleted file mode 100644
index 068b66c..0000000
--- a/src/main/angular/src/app/solar/Mass.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-export class Mass {
-
-  modelMeters: number;
-
-  constructor(
-    readonly name: string,
-    readonly realMeters: number,
-    readonly massKg: number,
-    readonly moons: Mass[],
-    modeMeters?: number,
-  ) {
-    this.modelMeters = modeMeters || realMeters;
-  }
-
-}
diff --git a/src/main/angular/src/app/solar/solar.component.ts b/src/main/angular/src/app/solar/solar.component.ts
deleted file mode 100644
index c23691c..0000000
--- a/src/main/angular/src/app/solar/solar.component.ts
+++ /dev/null
@@ -1,90 +0,0 @@
-import {Component, OnInit} from '@angular/core';
-import {DecimalPipe, NgForOf} from "@angular/common";
-import {FormsModule} from "@angular/forms";
-import {Mass} from "./Mass";
-
-const PREFIXES_POSITIVE: string[] = ['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y', 'R', 'Q'];
-
-const PREFIXES_NEGATIVE: string[] = ['', 'm', 'µ', 'n', 'p', 'f', 'a', 'z', 'y', 'r', 'q'];
-
-@Component({
-  selector: 'app-solar',
-  standalone: true,
-  imports: [
-    NgForOf,
-    DecimalPipe,
-    FormsModule
-  ],
-  templateUrl: './solar.component.html',
-  styleUrl: './solar.component.less'
-})
-export class SolarComponent implements OnInit {
-
-  protected readonly jupiter = new Mass('Jupiter', 139820000, 1.898e30, [
-    new Mass('Io', 3643000, 8.932e25, []),
-    new Mass('Europa', 3121600, 4.799e25, []),
-    new Mass('Ganymede', 5262400, 1.4819e26, []),
-    new Mass('Callisto', 4820600, 1.0759e26, [])
-  ], 0.18);
-
-  protected masses: Mass[] = [
-    new Mass('Sonne', 1392700000, 1.989e33, []),
-    new Mass('Merkur', 4879400, 3.285e26, []),
-    new Mass('Venus', 12104000, 4.867e27, []),
-    new Mass('Erde', 12742000, 5.972e27, [
-      new Mass('Mond', 3474800, 7.342e25, [])
-    ]),
-    new Mass('Mars', 6779000, 6.39e26, [
-      new Mass('Phobos', 22533, 1.0659e19, []),
-      new Mass('Deimos', 12400, 1.4762e18, [])
-    ]),
-    this.jupiter,
-    new Mass('Saturn', 116460000, 5.683e29, [
-      new Mass('Titan', 5149460, 1.3452e26, []),
-      new Mass('Enceladus', 504200, 1.08e23, [])
-    ]),
-    new Mass('Uranus', 50724000, 8.681e28, [
-      new Mass('Miranda', 471600, 6.59e22, []),
-      new Mass('Ariel', 1157800, 1.35e24, []),
-      new Mass('Umbriel', 1169400, 1.17e24, []),
-      new Mass('Titania', 1576800, 3.42e24, []),
-      new Mass('Oberon', 1522800, 3.01e24, [])
-    ]),
-    new Mass('Neptun', 49244000, 1.024e29, [
-      new Mass('Triton', 2706800, 2.14e25, [])
-    ])
-  ];
-
-  protected pivot: Mass = this.jupiter;
-
-  protected divisor: number = 1;
-
-  protected prefix = "";
-
-  ngOnInit() {
-    const scale = this.pivot.modelMeters / this.pivot.realMeters;
-    this.masses.filter(m => m != this.pivot).forEach(m => m.modelMeters = scale * m.realMeters);
-    this.updatePrefix();
-  }
-
-  private updatePrefix() {
-    const exponent = Math.floor(Math.log10(this.jupiter.modelMeters));
-    const prefixGroup = Math.floor(exponent / 3);
-    if (prefixGroup <= 0) {
-      this.prefix = PREFIXES_NEGATIVE[-prefixGroup];
-    } else {
-      this.prefix = PREFIXES_POSITIVE[prefixGroup];
-    }
-    const exponentFromGroup = prefixGroup * 3;
-    this.divisor = Math.pow(10, exponentFromGroup);
-  }
-
-  unit(value: number, unit: string) {
-    return this.doPrefix(value, unit, this.divisor, this.prefix, 2);
-  }
-
-  doPrefix(value: number, unit: string, divisor: number, prefix: string, digits: number) {
-    return (value / divisor).toFixed(digits) + ' ' + prefix + unit;
-  }
-
-}
diff --git a/src/main/angular/src/index.html b/src/main/angular/src/index.html
index c42d8f4..270e348 100644
--- a/src/main/angular/src/index.html
+++ b/src/main/angular/src/index.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="en">
+<html lang="de">
   <head>
     <meta charset="utf-8">
     <title>Patrix Tools</title>