In a binary star system with bloom enabled, only one of the stars get the bloom effect. The other one seems faded out and ghostly.
Inside a planet atmosphere you can only see 1 star (the one where bloom works with).
Without bloom:
{F652}
With bloom:
{F654}
How to reproduce:
# find a binary system (system coordinates from screenshots are from the test server port 4242)
# use tab + F4 to switch between bloom enabled or disabled