In Karaf, when I do a bundle:list, I get:
205 | Active | 80 | 0.9.0.201711202142 | Astro Binding
So it seems I have a higher release. There are some issues in OH 2.1 with Astro, upgrading to 2.2 might solve it.
2017-11-23 18:12:43.042 [ERROR] [core.karaf.internal.FeatureInstaller] - Failed installing 'openhab-binding-astro': Error restarting bundles
You could try this: clear the cache.