华盛顿大学和亚利桑那大学的天文学家们研究发现,和地球差不多大小的星球,在万有引力的作用下,能通过潮汐加热从而产生足够的热量来防止内部冷却。根据计算机模型显示,这样的原理,也同样适用于太阳系以外的行星。 Astronomers at Washington University and the University of Arizona have found that planets about the size of Earth can be heated by the tides under the force of gravity to generate enough heat to prevent internal cooling. According to computer models, this principle applies equally to planets other than the solar system.