you know something similar to this image right here
For simple static lens flare you can try blender Composite nodes:
- Light source very small Object with high Emission like 1000.
- Big star is Glare node > Simple Star (Streaks works too, but I could not get them enough long)
- Central effect is based on Glare node > Ghost Fog "scratched" by Cloud Texture plus Sun Beams node.
For advanced and more flexibility try this https://codeofart.com/flares-wizard/