[fluffy]

Diffraction spikes are caused by light interacting with the internal support structure of the telescope. https://en.wikipedia.org/wiki/Diffraction_spike

[dragnet2]

Like this.

[dragnet2]

Btw, with the refractor style scopes, there is no secondary mirror hence no obstruction. So when there are star spikes, it’s generally means it’s been a bit manipulated. But in some cases it looks great!