Blender Nodes not Rendering

Hi
I’ve currently been following Andrew Price’s tutorial on creating a realistic earth. Now, this is what I get:



In the video, however, A. Price uses nodes to create a basic “glow” around the earth. And that’s exactly what I’ve been trying to do for the past week…

Here’s my problem: I’ve done my “nodes” but in the final render, the glow isn’t there. However, in the preview of the node window, the glow is there! :mad: :



How come the glow effect isn’t in the final render?
By the way, I am new to blender, and to this forum. So, if I am posting in the wrong place, tell me!

Your composite node is linked to your source image not to the glow output


Thanks for your quick reply!