Temple is a series of three round, perfectly formed planets that are devoid of life. They orbit their star in exactly circular orbits in the same plane. Temple II contains an ancient temple to the Emperor. It had been a stop for pilgirms for centuries prior to the warp storms that closed off the Expanse.
Temple was only recently discovered by the crew of the Voidwalkers’ Salvation. Whether they will release this information to the public is yet to be determined.