Very distant objects don't display

[SevenSpheres]

Recently something has caused very distant objects to not display. There's a distance limit beyond which stars aren't rendered, however this affects objects closer than that limit and also affects galaxies. Example dsc:

Galaxy "Star Wars Galaxy"
{
	Type		"Sb"
	RA       0.0873333
	Dec      24.5855555
	Distance<pc>     2.83e8
	Radius   60110.29229635
	AbsMag     -20.38
	Angle     -118.578
	Axis [ -0.5823 -0.7591 -0.2912 ]
}

The galaxy is invisible, but reduce its distance significantly and it becomes visible.