Y’welcome, happy to help!
I was playing around with the Glare node Streaks type trying to figure it out when I realized that in my entry render I’d left the Color Modulation field on the default of 0.25 – dropping that to zero reduced the red but didn’t get rid of it entirely, so I still can’t tell you what caused it. (But upping the Color Modulation field to 1 yielded an interesting rainbow effect – combined with upping the Fade field to 1 looked kinda techie.)
But it also got me wondering: what if I wanted multi-colored stars? After all, visible stars come in different colors. Came up with this:
not an entry
Starfield Multicolor Test 002.blend (909.7 KB)