Not all celestial bodies - for instance our Moon is currently in this respect completely out of service, but in the past it might not been. Likewise, the two moons of Mars, Phobos and Deimos. Generally speaking, any "little guy" in the solar system and in space, without higher temperature underground and molten nucleus, like geothermal energy. Objects, that do not hold any atmosphere and do not exhibit a volcanic activity, will appear similarly.
Hindi lahat ng mga celestial katawan - halimbawa aming Buwan ay kasalukuyang sa paggalang na ito ganap out ng serbisyo, ngunit sa nakalipas na ito ay hindi maaaring naging. Gayundin, ang dalawang moons ng Mars, Phobos at Deimos. Pangkalahatan pagsasalita, ang anumang "maliit na tao" sa solar system at sa espasyo, walang mas mataas na temperatura ng nucleus sekreto at tinunaw, tulad ng geothermal enerhiya.