So, I have a species in my story, one of many, called a Baldrethian. They inhabit a planet called Baldreth, which has been moving across the galaxy for eons. It started off closer to the Sun than Venus, and has slowly been drifting away from it due to an unknown force. When it was around the same distance from the Sun as Earth is, Baldrethians appeared.
My question is, as the planet slowly drifted away and got colder and colder, now at an extremely cold temperature, would the species be able to adapt to the temperature or would they die off?