Do you have an RSS feed just for the astronomy posts on your blog?
Edit : it seems that I now do have one : https://lucassifoni.info/blog/tag/astronomy/rss.xml
I am not an RSS user myself, I tested it with an online reader and it should be working.I just tried it, the links don't seem to be working. I get sent to https://lucassifoni.info/miniscope-tiny-telescope.mdx for example