Hi everyone! Another newbie here. Have really enjoyed this discussion. It’s taken me 2 years to gain the courage to try my scope again and making slow but significant progress. Having said that, I also see a large black bob of the secondary mirror when I try and look at Jupiter. I’ve got the Skywatcher Heritage 130p. I think I’ve collimated it as I focused on a tree. I saw the full moon last night and it was beautiful! Much less luck with a Jupiter. I have to say I had a good giggle at the suggestion that the black blob I was seeing was the shadow of Jupiter’s moon. How did you resolve your issue!? I don’t have a barlow, not sure if that matters. Maybe won’t be able to see much with the 10mm and 25mm eye pieces I have? I’m based in London so light might not be great…But had a clear view of Jupiter quite high in the sky with no luck. Thanks for your help!