Eclipse Sun

   
      

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Path Fill="Gray" Stroke="Black" StrokeThickness="3">
        <Path.Data>
            <GeometryGroup>
                <EllipseGeometry Center="96 300" RadiusX="48" RadiusY="48" />
                <EllipseGeometry Center="300 100" RadiusX="48" RadiusY="48">
                    <EllipseGeometry.Transform>
                        <RotateTransform x:Name="rotate"
                                         CenterX="300" CenterY="300" />
                    </EllipseGeometry.Transform>
                </EllipseGeometry>
            </GeometryGroup>
        </Path.Data>
    </Path>

    <Canvas.Triggers>
        <EventTrigger RoutedEvent="Canvas.Loaded">
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetName="rotate"
                                     Storyboard.TargetProperty="Angle"
                                     From="0" To="360" Duration="0:0:5"
                                     RepeatBehavior="Forever" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </Canvas.Triggers>
</Canvas>