since sirius has two suns and the blue sun is in the wormhole on the other side and the other sun is on the edge of sirius (orange sun), i think that the temperatures fluctuate a lot from cold to hot to each planet and to the suns itself. sirius also has an optical illusion. If the blue and orange sun meet in the middle at the same time, it looks like we are in another universe (violet sun). the temperatures are not defined in sirius.