evelite

所谓的“熔岩行星”（或者“岩浆行星”）一共分为三个类型：恒星熔岩星，这类熔岩星的运行轨道比较靠近所在星系中的恒星，受到恒星高温辐射影响，它们的表面无法冷却凝固；第二种是引力熔岩星，它们受到强烈的引力偏移的拉扯而使得表面已经凝固的地壳周期性地大规模破裂；第三种是原发熔岩星，这些行星因为诸多未查明的原因而导致其无法冷却形成稳定的地壳。这三种类型的熔岩行星都有着较为相似的表面特征：巨大的橘红色熔岩区域遍布行星表面，而后两种熔岩行星都可能会在一个时期内出现短暂的凝固期，持续几年或几十年。

So-called "lava planets" (properly "magmatic planets") fall into one of three groups: solar magmatics, which orbit sufficiently close to their star that the surface never cools enough to solidify; gravitational magmatics, which experience gravitational shifts sufficiently strong to regularly and significantly fracture cooling crusts; and magmatoids, which are for largely-unexplained reasons simply incapable of cooling and forming a persistent crust. All three types generally exhibit the same external phenomena - huge red-orange lava fields being a defining feature - but the latter two types are sometimes capable of briefly solidifying for a period measured in years or perhaps decades.