These are diffraction spikes [0], caused by the support structures that carry the secondary mirror. The shape of the spikes are influenced by the arrangement of

These are diffraction spikes [0], caused by the support structures that carry the secondary mirror. The shape of the spikes are influenced by the arrangement of the struts. Here's a better researched answer of the same: [1] 0: https://en.wikipedia.org/wiki/Diffraction_spike https://en.wikipedia.org/wiki/Diffraction_spike 1: https://www.quora.com/What-will-the-diffraction-spikes-on-stars-imaged-by-the-James-Webb-Space-Telescope-look-like https://www.quora.com/What-will-the-diffraction-spikes-on-st...