diff --git a/public/images/structures/dyson-sphere.jpeg b/public/images/structures/dyson-sphere.jpeg
new file mode 100644
index 0000000..e0ae00f
Binary files /dev/null and b/public/images/structures/dyson-sphere.jpeg differ
diff --git a/public/images/structures/refueling-station.jpeg b/public/images/structures/refueling-station.jpeg
new file mode 100644
index 0000000..ee65cff
Binary files /dev/null and b/public/images/structures/refueling-station.jpeg differ
diff --git a/public/images/structures/storage-station.jpeg b/public/images/structures/storage-station.jpeg
new file mode 100644
index 0000000..cb6fbcd
Binary files /dev/null and b/public/images/structures/storage-station.jpeg differ
diff --git a/src/lib/classes/Structure.ts b/src/lib/classes/Structure.ts
new file mode 100644
index 0000000..d0de7a9
--- /dev/null
+++ b/src/lib/classes/Structure.ts
@@ -0,0 +1,70 @@
+import DBStructure from "../../types/db/DBStructure";
+import StructureManager from "./managers/StructureManager";
+
+export default class Structure {
+    manager: StructureManager
+    data: DBStructure;
+    level: number;
+
+    constructor(manager: StructureManager, data: DBStructure, level: number) {
+        this.manager = manager;
+        this.data = data;
+        this.level = level;
+    }
+
+    // async checkRequiredResources(level: number): Promise<boolean> {
+    //     const resources = await this.manager.planet.resources.calculateCurrentAvailableResources();
+
+    //     const requirements = this.data.requirements.resources;
+
+    //     let canBuild = true;
+
+    //     for(let res of requirements) {
+    //         const resource = resources.find(r => r.id === res.id);
+    //         if(!resource) return false;
+
+    //         const required = Math.pow(this.data.multiplier, level) * res.amount;
+
+    //         if(resource.amount < required) {
+    //             canBuild = false;
+    //             break;
+    //         }
+    //     }
+
+    //     return canBuild;
+    // }
+
+    // async checkRequirements(): Promise<{ canBuild: boolean, error: string }> {
+    //     const playerBuildings = this.manager.buildings;
+    //     let playerBuildingsCanBuild = { canBuild: true, missing: "" };
+    //     this.data.requirements.buildings.forEach((buildingReq: any) => {
+    //         if(playerBuildings.filter((building) => building.data.id === buildingReq.id)[0]?.level ?? 0 < buildingReq.level) {
+    //             playerBuildingsCanBuild = { canBuild: false, missing: `${buildingReq.id} level ${buildingReq.level} required, found ${playerBuildings.filter((building) => building.data.id === buildingReq.id)[0]?.level ?? 0}` };
+    //             return;
+    //         }
+    //     });
+    //     if(!playerBuildingsCanBuild.canBuild) return {
+    //         canBuild: false,
+    //         error: playerBuildingsCanBuild.missing
+    //     }
+
+    //     // research
+    //     const playerResearch = this.manager.planet.manager.owner.research;
+    //     let playerResearchCanBuild = { canBuild: true, missing: "" };
+    //     for(const researchReq of this.data.requirements.research) {
+    //         if((playerResearch.research.find((research) => research.id === researchReq.id)?.level ?? 0) < researchReq.level) {
+    //             playerResearchCanBuild = { canBuild: false, missing: `${researchReq.id} level ${researchReq.level} required, found ${playerResearch.research.find((research) => research.id === researchReq.id)?.level ?? 0}` };
+    //         }
+    //     };
+        
+    //     if(!playerResearchCanBuild.canBuild) return {
+    //         canBuild: false,
+    //         error: playerResearchCanBuild.missing
+    //     }
+
+    //     return {
+    //         canBuild: true,
+    //         error: ""
+    //     }
+    // }
+}
\ No newline at end of file
diff --git a/src/lib/classes/managers/LocationManager.ts b/src/lib/classes/managers/LocationManager.ts
index b115887..edc5f55 100644
--- a/src/lib/classes/managers/LocationManager.ts
+++ b/src/lib/classes/managers/LocationManager.ts
@@ -5,6 +5,7 @@ import { getSectorById } from "../../db/sectors";
 import { getSystemById } from "../../db/systems";
 import { getAllUsers } from "../../db/users";
 import User from "../User";
+import StructureManager from "./StructureManager";
 
 export type Galaxy = {
     _id: ObjectId,
@@ -29,6 +30,7 @@ export type System = {
     sector: Sector,
     name: string,
     ownedBy: User,
+    structures: StructureManager,
     planets: PlanetManager
 }
 
@@ -48,6 +50,9 @@ class LocationManager {
     users: User[] = [];
     
     async init() {
+        this.galaxies = [];
+        this.users = [];
+
         const users = await getAllUsers();
         users.forEach(async user => {
             this.users.push(new User(user._id, user.username, user.email, user.createdAt, user.updatedAt, user.lastLogin));
@@ -86,9 +91,13 @@ class LocationManager {
                         sector: sectorObject,
                         name: systemData.name,
                         ownedBy: user,
+                        //@ts-ignore
+                        structures: null,
                         planets: new PlanetManager(user)
                     };
 
+                    systemObject.structures = await new StructureManager(systemObject).init(systemData.structures);
+
                     await systemObject.planets.fillData(systemObject, systemData.planets);
 
                     sectorObject.systems.push(systemObject);
@@ -176,5 +185,5 @@ class LocationManager {
 }
 
 const locationManager = LocationManager.getInstance();
-locationManager.init();
+await locationManager.init();
 export default locationManager;
\ No newline at end of file
diff --git a/src/lib/classes/managers/StructureManager.ts b/src/lib/classes/managers/StructureManager.ts
new file mode 100644
index 0000000..2fa85a2
--- /dev/null
+++ b/src/lib/classes/managers/StructureManager.ts
@@ -0,0 +1,50 @@
+import { updatePlanetBuildings } from '../../db/planets';
+import Building from '../Building';
+import DBStructure from '../../../types/db/DBStructure';
+import { System } from './LocationManager';
+import { getAllStructures } from '../../db/structures';
+import Structure from '../Structure';
+import { updateSystemStructures } from '../../db/systems';
+
+export default class StructureManager {
+    structures: Array<Structure> = [];
+    structuresDB: Array<DBStructure> = []
+    system: System;
+
+    constructor(system: System) {
+        this.system = system;
+    }
+
+    async init(structureData: { id: string, level: number }[]) {
+        this.structuresDB = await getAllStructures();
+        structureData.forEach(structure => {
+            const structureToFind = this.structuresDB.find(s => s.id === structure.id);
+
+            if(structureToFind) this.structures.push(new Structure(
+                this,
+                structureToFind,
+                structure.level
+            ))
+        })
+
+        return this;
+    }
+
+    getStructureById(id: string) {
+        return this.structures.find(structure => structure.data.id === id);
+    }
+
+    addStructure(structure: Structure) {
+        const findStructure = this.structures.find(s => s.data.id === structure.data.id);
+        if(!findStructure) this.structures.push(structure);
+        else findStructure.level++;
+    }
+
+    removeStructure(id: string) {
+        this.structures = this.structures.filter(structure => structure.data.id !== id);
+    }
+
+    async sync() {
+        await updateSystemStructures(this.system._id, this.structures.map(structure => { return { id: structure.data.id, level: structure.level } }));
+    }
+}
\ No newline at end of file
diff --git a/src/lib/db/lang.ts b/src/lib/db/lang.ts
index d5054d1..7ecbf1c 100644
--- a/src/lib/db/lang.ts
+++ b/src/lib/db/lang.ts
@@ -7,6 +7,7 @@ export const getLang = async (language = "en") => {
         buildings: await lang[1].find({}).toArray(),
         ships: await lang[2].find({}).toArray(),
         resources: await lang[3].find({}).toArray(),
-        research: await lang[4].find({}).toArray()
+        research: await lang[4].find({}).toArray(),
+        structures: await lang[5].find({}).toArray()
     }
 }
\ No newline at end of file
diff --git a/src/lib/db/mongodb.ts b/src/lib/db/mongodb.ts
index 45d82f6..7782473 100644
--- a/src/lib/db/mongodb.ts
+++ b/src/lib/db/mongodb.ts
@@ -76,6 +76,11 @@ export const Fleet = async() => {
     return db.collection('fleet');
 }
 
+export const Structures = async() => {
+    const db = await getDB();
+    return db.collection('structures');
+}
+
 export const Lang = async (language = "en") => {
     const db = await getDB(`${config.MONGODB_DB}_${language}`);
     return [
@@ -83,6 +88,7 @@ export const Lang = async (language = "en") => {
         await db.collection('buildings'),
         await db.collection('ships'),
         await db.collection('resources'),
-        await db.collection('research')
+        await db.collection('research'),
+        await db.collection('structures')
     ]
 }
\ No newline at end of file
diff --git a/src/lib/db/structures.ts b/src/lib/db/structures.ts
new file mode 100644
index 0000000..c1bfd23
--- /dev/null
+++ b/src/lib/db/structures.ts
@@ -0,0 +1,12 @@
+import DBStructure from '../../types/db/DBStructure';
+import { Structures } from '../db/mongodb';
+
+export const getAllStructures = async () => {
+    return (await Structures()).find({}).toArray() as unknown as Array<DBStructure>;
+}
+
+export const getStructureById = async (id: string) => {
+    return (await Structures()).findOne({
+        id
+    }) as unknown as DBStructure;
+}
\ No newline at end of file
diff --git a/src/lib/db/systems.ts b/src/lib/db/systems.ts
index 339b1eb..9b55015 100644
--- a/src/lib/db/systems.ts
+++ b/src/lib/db/systems.ts
@@ -10,4 +10,13 @@ export const getSystemById = async (id: ObjectId) => {
     return await (await Systems()).findOne({
         _id: id
     }) as DBSystem;
+}
+
+export const updateSystemStructures = async (systemId: ObjectId, structures: Array<{ id: string, level: number }>) => {
+    const systems = await Systems();
+    await systems.updateOne({ _id: systemId }, {
+        $set: {
+            structures
+        }
+    });
 }
\ No newline at end of file
diff --git a/src/pages/api/structures/createStructure.ts b/src/pages/api/structures/createStructure.ts
new file mode 100644
index 0000000..6ae2660
--- /dev/null
+++ b/src/pages/api/structures/createStructure.ts
@@ -0,0 +1,110 @@
+import { type APIRoute } from "astro";
+import validateAccessToken from "../../../lib/utils/validateAccessToken";
+import { getUserByAccessToken } from "../../../lib/db/users";
+import { ObjectId } from "mongodb";
+import locationManager from "../../../lib/classes/managers/LocationManager";
+import Building from "../../../lib/classes/Building";
+import { getAllResources } from "../../../lib/db/resources";
+import Structure from "../../../lib/classes/Structure";
+
+export const POST: APIRoute = async({ request }) => {
+    const response = await validateAccessToken(request);
+    if(response instanceof Response) return response;
+
+    const user = await getUserByAccessToken(response);
+    if(user === null) {
+        return new Response(
+            JSON.stringify({
+                code: 401,
+                message: "Unauthorized"
+            }), { status: 401 }
+        )
+    }
+
+    let body;
+    try {
+        body = await request.json()
+    } catch(e) {
+        return new Response(
+            JSON.stringify({
+                code: 400,
+                message: "Bad Request",
+                error: "Invalid JSON body"
+            }), { status: 400 }
+        )
+    }
+
+    const userSystem = locationManager.getSystem(new ObjectId(body.system));
+    
+    if(!userSystem) {
+        return new Response(
+            JSON.stringify({
+                code: 400,
+                message: "Bad Request",
+                error: "Invalid system ID"
+            }), { status: 400 }
+        )
+    }
+
+    const structureId: string = body.structureId;
+
+    const structureObj = userSystem.structures.structuresDB.find(s => s.id === structureId);
+
+    if(!structureObj) return new Response(
+        JSON.stringify({
+            code: 400,
+            message: "Bad Request",
+            error: "Invalid structure ID"
+        }), { status: 400 }
+    )
+
+    const structure = new Structure(userSystem.structures, structureObj, 1);
+
+    // const requirements = await structure.checkRequirements();
+    // const resources = await building.checkRequiredResources((userPlanet.buildings.getBuildingById(buildingId)?.level ?? 0) + 1);
+
+    // if(!requirements.canBuild || !resources) {
+    //     return new Response(
+    //         JSON.stringify({
+    //             code: 400,
+    //             message: "Bad Request",
+    //             error: `${requirements.error} | ${resources ? "" : "Not enough resources"}`
+    //         }), { status: 400 }
+    //     )
+    // }
+
+    // const resourcesDiff = await userPlanet.resources.getDifference(building.data.requirements.resources.map(res => {
+    //     return {
+    //         id: res.id,
+    //         amount: Math.pow(building.data.multiplier, (userPlanet.buildings.getBuildingById(buildingId)?.level ?? 0) + 1) * res.amount
+    //     }
+    // }));
+
+    // const resourceDB = await getAllResources();
+    // const resourcesAfter = resourcesDiff.map(res => {
+    //     const data = resourceDB.find(r => r.id === res.id);
+
+    //     if(!data) throw new Error("Resource not found");
+
+    //     return {
+    //         id: res.id,
+    //         amount: res.amount,
+    //         lastUpdated: res.lastUpdated,
+    //         perHourMiningRate: res.perHourMiningRate,
+    //         data
+    //     }
+    // });
+
+    // userPlanet.resources.update(resourcesAfter);
+    // userSystem.structures.addStructure(structure);
+
+    // await userSystem.structures.sync();
+    // await userPlanet.resources.sync();
+
+    return new Response(
+        JSON.stringify({
+            code: 200,
+            message: "OK"
+        }), { status: 200 }
+    );
+}
\ No newline at end of file
diff --git a/src/pages/game/systemManager/index.astro b/src/pages/game/systemManager/index.astro
index c09d078..8f5ab58 100644
--- a/src/pages/game/systemManager/index.astro
+++ b/src/pages/game/systemManager/index.astro
@@ -41,10 +41,16 @@ if(Astro.request.method === "POST") {
     <NavBar loggedIn="true" active="systemManager" />
     <ResourceBar />
 
-    <h1>Selected system: {currentSystem.name} <a href="/game/systemManager/select">(change)</a></h1>
-    <div class="planetList">
+    <h1>Selected system: {currentSystem.name} in {currentSystem.sector.name} in {currentSystem.sector.galaxy.name} <a href="/game/systemManager/select">(change)</a></h1>
+    <div class="system-links">
+        <a href="/game/systemManager">Overview</a>
+        <a href="/game/systemManager/structures">System-wide structures</a>
+        <a href="/game/systemManager/spaceStations">Space stations</a>
+        <a href="/game/systemManager/asteroids">Asteroids</a>
+    </div>
+    <div class="planet-list">
         {currentSystem.planets.planets.length === 0 ? <span>No planets in this sector</span> : currentSystem.planets.planets.map(planet => (
-            <div class="planetCard">
+            <div class="planet-card">
                 <h2>{planet.name}<div><form method="post"><input type="hidden" name="planetId" value={planet._id.toString()} /><input type="submit" value="Select" /></form></div></h2>
                 <p>Fields: {planet.fields}</p>
                 <h3>Buildings:</h3>
@@ -69,7 +75,27 @@ if(Astro.request.method === "POST") {
         color: white;
     }
 
-    .planetList {
+    h1 a {
+        color: lime;
+    }
+
+    .system-links {
+        display: flex;
+        flex-direction: row;
+        justify-content: center;
+        margin-bottom: 1rem;
+    }
+
+    .system-links a {
+        color: white;
+        background-color: #555;
+        padding: 0.5rem;
+        margin: 0 1rem;
+        border-radius: 5px;
+        text-decoration: none;
+    }
+
+    .planet-list {
         display: flex;
         flex-direction: row;
         flex-wrap: wrap;
diff --git a/src/pages/game/systemManager/structures.astro b/src/pages/game/systemManager/structures.astro
new file mode 100644
index 0000000..8c8d794
--- /dev/null
+++ b/src/pages/game/systemManager/structures.astro
@@ -0,0 +1,223 @@
+---
+import { ObjectId } from "mongodb";
+import NavBar from "../../../components/NavBar.astro";
+import ResourceBar from "../../../components/ResourceBar.astro";
+import Layout from "../../../layouts/Layout.astro";
+import locationManager from "../../../lib/classes/managers/LocationManager";
+import { getUserByAccessToken } from "../../../lib/db/users";
+import { getHighestWeightedLanguage, getLocales, getName, getObj } from "../../../lib/utils/langDriver";
+import ItemCard from "../../../components/ItemCard.astro";
+
+const loggedToken = Astro.cookies.get('sessionToken')?.value ?? null;
+const username = Astro.cookies.get('username')?.value ?? "";
+if(loggedToken === null || username === "") return Astro.redirect('/logout');
+
+const checkUser = await getUserByAccessToken(loggedToken);
+if(checkUser === null || checkUser.username !== username) return Astro.redirect('/logout');
+
+const currentSystemId = Astro.cookies.get('currentSystem')?.value ?? null;
+
+if(currentSystemId === null) return Astro.redirect('/game/systemManager/select');
+
+const currentSystem = locationManager.getSystem(new ObjectId(currentSystemId));
+
+if(currentSystem === undefined) {
+    Astro.cookies.delete('currentSystem');
+    return Astro.redirect('/game/systemManager/select');
+}
+
+if(Astro.request.method === "POST") {
+    const selectedStructureId = (await Astro.request.formData()).get('id') as string | null;
+
+    const request = await (await fetch(Astro.url.origin + '/api/structures/createStructure', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json',
+            'Authorization': 'Bearer ' + loggedToken
+        },
+        body: JSON.stringify({
+            system: currentSystemId,
+            structureId: selectedStructureId
+        })
+    })).json();
+
+    console.log(request);
+}
+
+const lang = await getLocales(Astro.cookies.get('language')?.value ?? await getHighestWeightedLanguage(Astro.request.headers.get('accept-language')));
+
+const modalSet: { [key: string]: { resources: Array<any>, research: Array<any>, buildings: Array<any>, energy: number } } = {};
+
+const structureList = currentSystem.structures.structuresDB;
+for(const structure of structureList) {
+	modalSet[structure.id] = {
+		resources: structure.requirements.resources.map(resource => {
+			return {
+				id: resource.id,
+				amount: Math.pow(structure.multiplier, (currentSystem.structures.getStructureById(structure.id)?.level ?? 0) ) * resource.amount
+			};
+		}),
+		research: structure.requirements.research,
+		buildings: structure.requirements.buildings,
+		energy: structure.energy
+	};
+}
+---
+<Layout title="System Manager">
+    <NavBar loggedIn="true" active="systemManager" />
+    <ResourceBar />
+
+    <h1>Selected system: {currentSystem.name} <a href="/game/systemManager/select">(change)</a></h1>
+    <div class="system-links">
+        <a href="/game/systemManager">Overview</a>
+        <a href="/game/systemManager/structures">System-wide structures</a>
+        <a href="/game/systemManager/spaceStations">Space stations</a>
+        <a href="/game/systemManager/asteroids">Asteroids</a>
+    </div>
+    <div id="structure-modal-background">
+		<div id="structure-modal-details" data-structure-id="">
+			<h3>Required resources</h3>
+			<div class="structure-modal-text" id="structure-modal-req-resources">None</div>
+			<h3>Required buildings</h3>
+			<div class="structure-modal-text" id="structure-modal-req-buildings">None</div>
+			<h3>Required research</h3>
+			<div class="structure-modal-text" id="structure-modal-req-research">None</div>
+		</div>
+	</div>
+    <div class="structure-list">
+        {currentSystem.structures.structuresDB.map(structure => (
+            <ItemCard
+                id={structure.id}
+                name={getName(lang, 'structures', structure.id)}
+                image={`/images/structures/${structure.id}.jpeg`}
+                level={(currentSystem.structures.getStructureById(structure.id)?.level ?? 0).toString()}
+                description={getObj(lang, 'structures', structure.id).description ?? ""}
+                button_type="general"
+                button_name="nav-build"
+            />
+        ))}
+    </div>    
+</Layout>
+<style>
+    * {
+		color: white;
+	}
+
+    h1 {
+        text-align: center;
+        color: white;
+    }
+
+    h1 a {
+        color: lime;
+    }
+
+    #structure-modal-background {
+		display: none;
+		position: fixed;
+		top: 0;
+		left: 0;
+		width: 100%;
+		height: 100%;
+		background: rgba(0, 0, 0, 0.5);
+		z-index: 100;
+	}
+
+	#structure-modal-details {
+		display: none;
+		position: fixed;
+		top: 50%;
+		left: 50%;
+		transform: translate(-50%, -50%);
+		width: 80%;
+		max-width: 800px;
+		background: rgba(0, 0, 0, 0.9);
+		border-radius: 8px;
+		padding: 1rem;
+		z-index: 101;
+	}
+
+	.structure-modal-text {
+		font-size: 1.5rem;
+	}
+
+    .system-links {
+        display: flex;
+        flex-direction: row;
+        justify-content: center;
+        margin-bottom: 1rem;
+    }
+
+    .system-links a {
+        color: white;
+        background-color: #555;
+        padding: 0.5rem;
+        margin: 0 1rem;
+        border-radius: 5px;
+        text-decoration: none;
+    }
+
+    .structure-list {
+        display: flex;
+        flex-direction: row;
+        flex-wrap: wrap;
+        justify-content: space-evenly;
+        color: white;
+		row-gap: 40px;
+		column-gap: 2%;
+    }
+
+    .structure-card div {
+        margin-top: auto;
+        margin-bottom: auto;
+        margin-left: 2rem;
+    }
+</style>
+<script define:vars={{ modalSet, lang }}>
+	const modalResources = document.getElementById("structure-modal-req-resources");
+	const modalBuildings = document.getElementById("structure-modal-req-buildings");
+	const modalResearch = document.getElementById("structure-modal-req-research");
+
+	document.querySelectorAll('.item-card-info-button').forEach((el) => {
+        el.addEventListener('click', () => {
+            // modal
+            const modalDiv = document.getElementById('structure-modal-details');
+            if(!modalDiv) return;
+            modalDiv.style.display = 'block';
+
+			const reqResources = modalSet[el.parentElement.parentElement.dataset.id]?.resources ?? [];
+			const reqBuildings = modalSet[el.parentElement.parentElement.dataset.id]?.buildings ?? [];
+			const reqResearch = modalSet[el.parentElement.parentElement.dataset.id]?.research ?? [];
+
+			modalResources.innerHTML = reqResources.length === 0 ? "None" : reqResources.map(resource => {
+				return `${lang['resources'].find(r => r.id === resource.id).name}: ${resource.amount}`;
+			}).join("<br />");
+
+			modalBuildings.innerHTML = reqBuildings.length === 0 ? "None" : reqBuildings.map(building => {
+				return `${lang['buildings'].find(b => b.id === building.id).name}: ${building.level}`;
+			}).join("<br />");
+
+			modalResearch.innerHTML = reqResearch.length === 0 ? "None" : reqResearch.map(research => {
+				return `${lang['research'].find(r => r.id === research.id).name}: ${research.level}`;
+			}).join("<br />");
+
+            // background
+            const backgroundDiv = document.getElementById('structure-modal-background');
+            if(!backgroundDiv) return;
+            backgroundDiv.style.display = 'block';
+        });
+    });
+
+    // close modal on background click
+    const bg = document.getElementById('structure-modal-background');
+    
+    bg?.addEventListener('click', () => {
+        const modalDiv = document.getElementById('structure-modal-details');
+        if(!modalDiv) return;
+        modalDiv.style.display = 'none';
+
+        const backgroundDiv = document.getElementById('structure-modal-background');
+        if(!backgroundDiv) return;
+        backgroundDiv.style.display = 'none';
+    });
+</script>
\ No newline at end of file
diff --git a/src/types/db/DBStructure.ts b/src/types/db/DBStructure.ts
new file mode 100644
index 0000000..65195b3
--- /dev/null
+++ b/src/types/db/DBStructure.ts
@@ -0,0 +1,15 @@
+import { ObjectId } from "mongodb";
+
+export default interface DBStructure {
+    _id: ObjectId;
+    id: string;
+    description: string;
+    requirements: {
+        buildings: Array<{ id: string, level: number }>,
+        research: Array<{ id: string, level: number }>,
+        resources: Array<{ id: string, amount: number }>,
+    };
+    energy: number;
+    time: number;
+    multiplier: number;
+}
\ No newline at end of file
diff --git a/src/types/db/DBSystem.ts b/src/types/db/DBSystem.ts
index 9b3030d..171ff87 100644
--- a/src/types/db/DBSystem.ts
+++ b/src/types/db/DBSystem.ts
@@ -4,5 +4,9 @@ export default interface DBSystem {
     _id: ObjectId;
     name: string;
     ownedBy: ObjectId;
+    structures: Array<{
+        id: string,
+        level: number
+    }>;
     planets: Array<ObjectId>;
 }
\ No newline at end of file