How to Render Composite layers for timeline video creation Hi and thanks in advance!

I followed the tut to make a planet using Blender 2.8.1.16, https://www.youtube.com/watch?v=oUNfPavsViY which resulted in an image containing 2 layers, Planet and Atmosphere.  I can render each separately using cycles and see them in the compositor.  I can create a simple timeline to spin the planet 360 degrees on Z and play it in timeline.  But when I attempt to render a series of images from the timeline, it ONLY renders the frame playhead images.

How can I instruct blender to create all of the images needed for the timeline rotation? 

In Output I have, Frame Start=1, End=250, Step=1, In Post Processing  I have tried with Compositing on and off and I have Sequencer Checked.
Easy Peasy - I was trying to use Render Image to render my animation sequence, not render animation.  After doing another project I realized I need to render animation either as a series of images (preferred) or as a single video output.  I was thinking that Render Animation was not for the image sequence but for the movie output.  Now I see that is part of the output format for Render Animation. ;-)