If you had a link in your original post, it may have been mistaken for spam. The mods have to take drastic measures to keep spam under control, and sometimes a post is mistakenly considered as spam...or you hit the wrong button and didn't post! I've done that a couple of times

Welcome, and don't take the post thing personally

Pete

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PJE

There's so much I don't know about astrophysics. I wish I had read that book by that wheelchair guy.