Galaxy Collision

[karaoglan43]

Hey my pc:
Nvidia Geforce 9500 Gt 1 Gb 128kb/s
4 gb ram
Intel qore quad 8300 Ghz 2,5
 but ı am started the universe snadbox sun,planets,moons,black holes normal (50 fps)
but ı am started the galaxy collisions or supernove in galaxies my fps is 3-5 what is problem?

[im4space]

This is a known problem. It has been discussed in two other threads:

http://universesandbox.com/forum/index.php/topic,13812.0.html

http://universesandbox.com/forum/index.php/topic,13636.msg137804.html#msg137804