diff --git a/glc/src/shader.rs b/glc/src/shader.rs
index f532cff..71cdea6 100644
--- a/glc/src/shader.rs
+++ b/glc/src/shader.rs
@@ -8,6 +8,7 @@ use crate::{
     error::Error,
     matrix::Matrix4f,
     misc::{AsEnum, Bindable},
+    vector::Vector4f,
 };
 
 /* Programm */
@@ -76,6 +77,7 @@ impl Program {
     pub fn uniform(&self, location: gl::GLint, uniform: Uniform<'_>) {
         match uniform {
             Uniform::Matrix4f(v) => gl::uniform_matrix_4fv(location, 1, gl::FALSE, v.as_ptr()),
+            Uniform::Vector4f(v) => gl::uniform_4fv(location, 1, v.as_ptr()),
         }
     }
 }
@@ -208,4 +210,5 @@ impl AsEnum for Type {
 
 pub enum Uniform<'a> {
     Matrix4f(&'a Matrix4f),
+    Vector4f(&'a Vector4f),
 }
diff --git a/space-crush-app/resources/shader/planet.frag b/space-crush-app/resources/shader/planet.frag
new file mode 100644
index 0000000..5cd25b0
--- /dev/null
+++ b/space-crush-app/resources/shader/planet.frag
@@ -0,0 +1,35 @@
+#version 450 core
+
+const float GLOW_STEP_0       = 0.480; // inner (min = 0.0)
+const float GLOW_STEP_1       = 0.975; // outer (max = 0.5)
+const float GLOW_PULSE_SIZE_0 = 0.010; // inner (+/-)
+const float GLOW_PULSE_SIZE_1 = 0.025; // outer (+/-)
+const float GLOW_PULSE_TIME   = 2.000;
+
+in FragmentData {
+    vec2 texCoords;
+} data;
+
+layout (std140, binding = 2) uniform Global {
+    float time;
+} global;
+
+layout(location = 3) uniform vec4 glowColor;
+
+uniform sampler2D tex;
+
+out vec4 color;
+
+void main() {
+    vec2  texCoords = data.texCoords - vec2(0.5);
+    float radius    = length(texCoords);
+    float bgPulse   = sin(GLOW_PULSE_TIME * global.time);
+    float alpha     = 1.0 - smoothstep(
+                        GLOW_STEP_0 + GLOW_PULSE_SIZE_0 * bgPulse,
+                        GLOW_STEP_1 + GLOW_PULSE_SIZE_1 * bgPulse,
+                        radius);
+
+    vec4 tex = texture(tex, data.texCoords);
+    vec4 glow = vec4(glowColor.rgb, glowColor.a * alpha);
+    color = tex * tex.a + glow * (1.0 - tex.a);
+}
diff --git a/space-crush-app/resources/shader/planet.vert b/space-crush-app/resources/shader/planet.vert
new file mode 100644
index 0000000..7e755a6
--- /dev/null
+++ b/space-crush-app/resources/shader/planet.vert
@@ -0,0 +1,22 @@
+#version 450 core
+
+const float GLOW_SIZE_FACTOR = 2.00;
+
+layout (location = 0) in vec3 position;
+
+layout (std140, binding = 0) uniform Camera {
+    mat4 projection;
+    mat4 view;
+    vec2 size;
+} camera;
+
+layout (location = 1) uniform mat4 model;
+
+out FragmentData {
+    vec2 texCoords;
+} data;
+
+void main() {
+    data.texCoords = position.xy * GLOW_SIZE_FACTOR + vec2(0.5);
+    gl_Position = camera.projection * camera.view * model * vec4(position * GLOW_SIZE_FACTOR, 1.0);
+}
diff --git a/space-crush-app/resources/shader/quad.frag b/space-crush-app/resources/shader/quad.frag
index 927be7b..8b23549 100644
--- a/space-crush-app/resources/shader/quad.frag
+++ b/space-crush-app/resources/shader/quad.frag
@@ -1,7 +1,7 @@
 #version 450 core
 
 in FragmentData {
-    vec2 tex_coords;
+    vec2 texCoords;
 } data;
 
 uniform sampler2D tex;
@@ -9,5 +9,5 @@ uniform sampler2D tex;
 out vec4 color;
 
 void main() {
-    color = texture(tex, data.tex_coords);
+    color = texture(tex, data.texCoords);
 }
diff --git a/space-crush-app/resources/shader/quad.vert b/space-crush-app/resources/shader/quad.vert
index bb58d6f..8d00085 100644
--- a/space-crush-app/resources/shader/quad.vert
+++ b/space-crush-app/resources/shader/quad.vert
@@ -11,10 +11,10 @@ layout (std140, binding = 0) uniform Camera {
 layout (location = 1) uniform mat4 model;
 
 out FragmentData {
-    vec2 tex_coords;
+    vec2 texCoords;
 } data;
 
 void main() {
-    data.tex_coords = position.xy + vec2(0.5);
+    data.texCoords = position.xy + vec2(0.5);
     gl_Position = camera.projection * camera.view * model * vec4(position, 1.0);
 }
diff --git a/space-crush-app/resources/shader/text.frag b/space-crush-app/resources/shader/text.frag
index b8a952d..3550c3e 100644
--- a/space-crush-app/resources/shader/text.frag
+++ b/space-crush-app/resources/shader/text.frag
@@ -1,7 +1,7 @@
 #version 450 core
 
 in FragmentData {
-    vec2 tex_coord;
+    vec2 texCoords;
     vec4 color;
 } data;
 
@@ -10,7 +10,7 @@ uniform sampler2D tex;
 out vec4 color;
 
 void main() {
-    float alpha = texture(tex, data.tex_coord).r;
+    float alpha = texture(tex, data.texCoords).r;
 
     if (alpha <= 0.0) {
         discard;
diff --git a/space-crush-app/resources/shader/text.vert b/space-crush-app/resources/shader/text.vert
index 41fce6d..28cf3e1 100644
--- a/space-crush-app/resources/shader/text.vert
+++ b/space-crush-app/resources/shader/text.vert
@@ -15,33 +15,33 @@ layout (std140, binding = 0) uniform Camera {
 layout (location = 1) uniform mat4 model;
 
 out FragmentData {
-    vec2 tex_coord;
+    vec2 texCoords;
     vec4 color;
 } data;
 
 void main() {
     vec2 position = vec2(0.0);
-    vec2 tex_coord = vec2(0.0);
+    vec2 texCoords = vec2(0.0);
 
     switch (gl_VertexID) {
         case 0:
             position = vec2(pos_min.x, pos_max.y);
-            tex_coord = vec2(tex_min.x, tex_max.y);
+            texCoords = vec2(tex_min.x, tex_max.y);
             break;
 
         case 1:
             position = vec2(pos_min.x, pos_min.y);
-            tex_coord = vec2(tex_min.x, tex_min.y);
+            texCoords = vec2(tex_min.x, tex_min.y);
             break;
 
         case 2:
             position = vec2(pos_max.x, pos_max.y);
-            tex_coord = vec2(tex_max.x, tex_max.y);
+            texCoords = vec2(tex_max.x, tex_max.y);
             break;
 
         case 3:
             position = vec2(pos_max.x, pos_min.y);
-            tex_coord = vec2(tex_max.x, tex_min.y);
+            texCoords = vec2(tex_max.x, tex_min.y);
             break;
     }
 
@@ -54,6 +54,6 @@ void main() {
 
     gl_Position = ortho * vec4(position, 0.0, 1.0);
 
-    data.tex_coord = tex_coord;
+    data.texCoords = texCoords;
     data.color = color;
 }
diff --git a/space-crush-app/src/lib.rs b/space-crush-app/src/lib.rs
index 945fef3..e238c92 100644
--- a/space-crush-app/src/lib.rs
+++ b/space-crush-app/src/lib.rs
@@ -9,8 +9,8 @@ use specs::{Dispatcher, DispatcherBuilder, World};
 pub use error::Error;
 
 use misc::{Events, TextManager, Window};
-use render::{Debug, Init, Test};
-use resources::{Camera, Config, Geometry, State};
+use render::{Debug, Init, Planets};
+use resources::{Camera, Config, Geometry, State, Uniform};
 use systems::StateUpdate;
 
 pub struct App<'a, 'b> {
@@ -28,6 +28,7 @@ impl<'a, 'b> App<'a, 'b> {
 
         world.insert(config);
         world.insert(Camera::new()?);
+        world.insert(Uniform::new()?);
         world.insert(Geometry::new()?);
         world.insert(State::default());
 
@@ -36,7 +37,7 @@ impl<'a, 'b> App<'a, 'b> {
         let mut dispatcher = DispatcherBuilder::new()
             .with(StateUpdate::new(world)?, "state_update", &[])
             .with_thread_local(Init::new(world)?)
-            .with_thread_local(Test::new(world)?)
+            .with_thread_local(Planets::new(world)?)
             .with_thread_local(Debug::new(&text_manager)?)
             .build();
         dispatcher.setup(world);
diff --git a/space-crush-app/src/main.rs b/space-crush-app/src/main.rs
index e456b0c..efa92dd 100644
--- a/space-crush-app/src/main.rs
+++ b/space-crush-app/src/main.rs
@@ -33,6 +33,8 @@ fn run(vfs: Vfs) -> Result<(), Error> {
     let mut common = Dispatcher::new(&mut world);
     let mut app = App::new(&mut world)?;
 
+    create_test_world(&mut world);
+
     while app.is_running() {
         common.process(&world);
         app.process(&world)?;
@@ -40,3 +42,18 @@ fn run(vfs: Vfs) -> Result<(), Error> {
 
     Ok(())
 }
+
+fn create_test_world(world: &mut World) {
+    use glc::vector::Vector2f;
+    use space_crush_common::components::{Planet, Position};
+    use specs::Builder;
+
+    world
+        .create_entity()
+        .with(Position {
+            pos: Vector2f::default(),
+            size: 500.0,
+        })
+        .with(Planet)
+        .build();
+}
diff --git a/space-crush-app/src/misc/world.rs b/space-crush-app/src/misc/world.rs
index bd17582..178253f 100644
--- a/space-crush-app/src/misc/world.rs
+++ b/space-crush-app/src/misc/world.rs
@@ -42,7 +42,11 @@ impl WorldHelper for World {
         let mut texture = Texture::new(Target::Texture2D)?;
         texture.upload(&data, true)?;
         texture.set_filter(FilterMin::LinearMipmapLinear, FilterMag::Linear)?;
-        texture.set_wrap(Wrap::ClampToEdge, Wrap::ClampToEdge, Wrap::ClampToEdge)?;
+        texture.set_wrap(
+            Wrap::ClampToBorder,
+            Wrap::ClampToBorder,
+            Wrap::ClampToBorder,
+        )?;
 
         Ok(texture)
     }
diff --git a/space-crush-app/src/render/init.rs b/space-crush-app/src/render/init.rs
index 7e666dc..180ab1e 100644
--- a/space-crush-app/src/render/init.rs
+++ b/space-crush-app/src/render/init.rs
@@ -11,7 +11,7 @@ use specs::{prelude::*, ReadExpect, System, World, WriteExpect};
 
 use crate::{
     misc::{MouseEvent, WorldHelper},
-    resources::{Camera, Config, Geometry, State},
+    resources::{Camera, Config, Geometry, State, Uniform},
     Error,
 };
 
@@ -41,6 +41,7 @@ impl Init {
 #[derive(SystemData)]
 pub struct InitData<'a> {
     camera: WriteExpect<'a, Camera>,
+    uniform: WriteExpect<'a, Uniform>,
     state: ReadExpect<'a, State>,
     config: ReadExpect<'a, Config>,
     geometry: ReadExpect<'a, Geometry>,
@@ -53,6 +54,7 @@ impl<'a> System<'a> for Init {
     fn run(&mut self, data: Self::SystemData) {
         let InitData {
             mut camera,
+            mut uniform,
             state,
             config,
             geometry,
@@ -106,6 +108,10 @@ impl<'a> System<'a> for Init {
             }
         }
 
+        if let Err(err) = uniform.update() {
+            error!("Error while updating global uniform data: {}", err);
+        }
+
         /* render background */
         self.program.bind();
         geometry.render_quad();
diff --git a/space-crush-app/src/render/mod.rs b/space-crush-app/src/render/mod.rs
index 6ceaa1b..3e2f46f 100644
--- a/space-crush-app/src/render/mod.rs
+++ b/space-crush-app/src/render/mod.rs
@@ -1,7 +1,7 @@
 mod debug;
 mod init;
-mod test;
+mod planets;
 
 pub use debug::Debug;
 pub use init::Init;
-pub use test::Test;
+pub use planets::Planets;
diff --git a/space-crush-app/src/render/planets.rs b/space-crush-app/src/render/planets.rs
new file mode 100644
index 0000000..f00e82e
--- /dev/null
+++ b/space-crush-app/src/render/planets.rs
@@ -0,0 +1,88 @@
+use glc::{
+    matrix::Matrix4f,
+    misc::Bindable,
+    shader::{Program, Type, Uniform},
+    texture::Texture,
+    vector::Vector4f,
+};
+use space_crush_common::{
+    components::{Planet, Position},
+    misc::WorldHelper as _,
+};
+use specs::{prelude::*, ReadExpect, ReadStorage, System, World};
+
+use crate::{
+    misc::WorldHelper,
+    resources::{Camera, Geometry, Uniform as GlobalUniform},
+    Error,
+};
+
+pub struct Planets {
+    program: Program,
+    texture: Texture,
+}
+
+impl Planets {
+    pub fn new(world: &World) -> Result<Self, Error> {
+        let program = world.load_program(vec![
+            (Type::Vertex, "resources/shader/planet.vert"),
+            (Type::Fragment, "resources/shader/planet.frag"),
+        ])?;
+        program.bind();
+        world.resource::<Camera>()?.bind(0)?;
+        world.resource::<GlobalUniform>()?.bind(2)?;
+        program.uniform(3, Uniform::Vector4f(&Vector4f::new(1.0, 1.0, 1.0, 0.1)));
+        program.unbind();
+
+        let texture = world.load_texture("resources/textures/planet01.png")?;
+
+        Ok(Self { program, texture })
+    }
+}
+
+#[derive(SystemData)]
+pub struct PlanetsData<'a> {
+    geometry: ReadExpect<'a, Geometry>,
+    position: ReadStorage<'a, Position>,
+    planet: ReadStorage<'a, Planet>,
+}
+
+impl<'a> System<'a> for Planets {
+    type SystemData = PlanetsData<'a>;
+
+    fn run(&mut self, data: Self::SystemData) {
+        let PlanetsData {
+            geometry,
+            position,
+            planet,
+        } = data;
+
+        gl::enable(gl::BLEND);
+        gl::blend_func(gl::SRC_ALPHA, gl::ONE_MINUS_SRC_ALPHA);
+
+        self.texture.bind();
+        self.program.bind();
+
+        for (p, _) in (&position, &planet).join() {
+            let x = p.pos.x;
+            let y = p.pos.y;
+            let s = p.size;
+
+            let m = Matrix4f::new(
+                Vector4f::new(s, 0.0, 0.0, 0.0),
+                Vector4f::new(0.0, s, 0.0, 0.0),
+                Vector4f::new(0.0, 0.0, s, 0.0),
+                Vector4f::new(x, y, 0.0, 1.0),
+            );
+
+            self.program.uniform(1, Uniform::Matrix4f(&m));
+
+            geometry.render_quad();
+        }
+
+        self.program.unbind();
+        self.texture.unbind();
+
+        gl::disable(gl::BLEND);
+    }
+}
diff --git a/space-crush-app/src/render/test.rs b/space-crush-app/src/render/test.rs
deleted file mode 100644
index 9313375..0000000
--- a/space-crush-app/src/render/test.rs
+++ /dev/null
@@ -1,69 +0,0 @@
-use glc::{
-    matrix::{Angle, Matrix4f},
-    misc::Bindable,
-    shader::{Program, Type, Uniform},
-    texture::Texture,
-    vector::Vector3f,
-};
-use space_crush_common::{misc::WorldHelper as _, resources::Global};
-use specs::{ReadExpect, System, World};
-
-use crate::{
-    misc::WorldHelper,
-    resources::{Camera, Geometry},
-    Error,
-};
-
-pub struct Test {
-    model: Matrix4f,
-    program: Program,
-    texture: Texture,
-}
-
-impl Test {
-    pub fn new(world: &World) -> Result<Self, Error> {
-        let model = Matrix4f::scale(Vector3f::new(500.0, 500.0, 500.0));
-
-        let program = world.load_program(vec![
-            (Type::Vertex, "resources/shader/quad.vert"),
-            (Type::Fragment, "resources/shader/quad.frag"),
-        ])?;
-        program.bind();
-        world.resource::<Camera>()?.bind(0)?;
-        program.unbind();
-
-        let texture = world.load_texture("resources/textures/planet01.png")?;
-
-        Ok(Self {
-            model,
-            program,
-            texture,
-        })
-    }
-}
-
-impl<'a> System<'a> for Test {
-    type SystemData = (ReadExpect<'a, Global>, ReadExpect<'a, Geometry>);
-
-    fn run(&mut self, (global, geometry): Self::SystemData) {
-        self.model = self.model
-            * Matrix4f::rotate(
-                Vector3f::new(0.0, 0.0, 1.0),
-                Angle::Deg(10.0 * global.delta),
-            );
-
-        gl::enable(gl::BLEND);
-        gl::blend_func(gl::SRC_ALPHA, gl::ONE_MINUS_SRC_ALPHA);
-
-        self.texture.bind();
-        self.program.bind();
-        self.program.uniform(1, Uniform::Matrix4f(&self.model));
-
-        geometry.render_quad();
-
-        self.program.unbind();
-        self.texture.unbind();
-
-        gl::disable(gl::BLEND);
-    }
-}
diff --git a/space-crush-app/src/resources/mod.rs b/space-crush-app/src/resources/mod.rs
index 580cc16..3e78906 100644
--- a/space-crush-app/src/resources/mod.rs
+++ b/space-crush-app/src/resources/mod.rs
@@ -2,8 +2,10 @@ mod camera;
 mod config;
 mod geometry;
 mod state;
+mod uniform;
 
 pub use camera::Camera;
 pub use config::Config;
 pub use geometry::Geometry;
 pub use state::State;
+pub use uniform::Uniform;
diff --git a/space-crush-app/src/resources/uniform.rs b/space-crush-app/src/resources/uniform.rs
new file mode 100644
index 0000000..4572b36
--- /dev/null
+++ b/space-crush-app/src/resources/uniform.rs
@@ -0,0 +1,42 @@
+use std::time::Instant;
+
+use glc::{
+    array_buffer::{ArrayBuffer, Target, Usage},
+    error::Error,
+};
+
+pub struct Uniform {
+    buffer: ArrayBuffer,
+    start_time: Instant,
+}
+
+#[repr(C, packed)]
+struct Data {
+    time: f32,
+}
+
+impl Uniform {
+    pub fn new() -> Result<Self, Error> {
+        let mut buffer = ArrayBuffer::new(Target::UniformBuffer)?;
+        buffer.buffer_data(Usage::StaticDraw, &[Data { time: 0.0 }])?;
+
+        Ok(Self {
+            buffer,
+            start_time: Instant::now(),
+        })
+    }
+
+    pub fn update(&mut self) -> Result<(), Error> {
+        let time = Instant::now().duration_since(self.start_time).as_secs_f32();
+
+        let mut data = self.buffer.map_mut::<Data>(true)?;
+
+        data[0].time = time;
+
+        Ok(())
+    }
+
+    pub fn bind(&self, index: gl::GLuint) -> Result<(), Error> {
+        Error::checked(|| self.buffer.bind_buffer_base(index))
+    }
+}
diff --git a/space-crush-common/src/components/mod.rs b/space-crush-common/src/components/mod.rs
index 2fa936e..0911c30 100644
--- a/space-crush-common/src/components/mod.rs
+++ b/space-crush-common/src/components/mod.rs
@@ -1,3 +1,7 @@
+mod planet;
 mod position;
+mod velocity;
 
+pub use planet::Planet;
 pub use position::Position;
+pub use velocity::Velocity;
diff --git a/space-crush-common/src/components/planet.rs b/space-crush-common/src/components/planet.rs
new file mode 100644
index 0000000..8a9e4e7
--- /dev/null
+++ b/space-crush-common/src/components/planet.rs
@@ -0,0 +1,8 @@
+use specs::{Component, NullStorage};
+
+#[derive(Default)]
+pub struct Planet;
+
+impl Component for Planet {
+    type Storage = NullStorage<Self>;
+}
diff --git a/space-crush-common/src/components/position.rs b/space-crush-common/src/components/position.rs
index 58f2e25..a52ae7f 100644
--- a/space-crush-common/src/components/position.rs
+++ b/space-crush-common/src/components/position.rs
@@ -1,24 +1,11 @@
-use std::ops::{Deref, DerefMut};
-
 use glc::vector::Vector2f;
 use specs::{Component, VecStorage};
 
-pub struct Position(pub Vector2f);
+pub struct Position {
+    pub pos: Vector2f,
+    pub size: f32,
+}
 
 impl Component for Position {
     type Storage = VecStorage<Self>;
 }
-
-impl Deref for Position {
-    type Target = Vector2f;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl DerefMut for Position {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}