There are gray links in my graph view

Hi I am new to obsidian. For some reason there are random notes called as ‘Pasted image… .png’, and for some reason I cant delete the notes and its stuck in my graph view. It would be nice if someone could explain this to me

Those are images that you have in your vault that are linked to notes.

Does Chemical Energetics have 2 images on it?

You can hide these from the graph view with the settings icon.
The graph view becomes less and less useful as your vault grows and grows so I wouldn’t put much stock in it.

Omg thank you soo much.
It looks a lot better now .