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<blockquote data-quote="Umbran" data-source="post: 6653590" data-attributes="member: 177">Hm.&nbsp; Usually, we assume that life must evolve on a planetary body, because that's the only place where we have matter dense enough, and enough warmth.&nbsp; The basic problem is getting it out of the gravity of the planet after that.&nbsp; Even if you could imagine a system evolving to launch something into space, the energy required to leave a planet is very large.&nbsp; The energy required to leave a solar system is even larger.&nbsp; What you ask is difficult.But then I am reminded of Gregory Benford's book, &quot;Heart of the Comet&quot;, in which researchers land on a comet, and find life.&nbsp; Not *intelligent* life, but something more like fungus.&nbsp; The heat of their station throws the growth patterns of this deep-space-cold adapted life into far overdrive, and wackiness ensues.If you can get life out into the Oort cloud of the star, then maybe some random gravitational interactions with a passing star might break a thing loose and wandering.</blockquote>

[QUOTE="Umbran, post: 6653590, member: 177"] Hm. Usually, we assume that life must evolve on a planetary body, because that's the only place where we have matter dense enough, and enough warmth. The basic problem is getting it out of the gravity of the planet after that. Even if you could imagine a system evolving to launch something into space, the energy required to leave a planet is very large. The energy required to leave a solar system is even larger. What you ask is difficult. But then I am reminded of Gregory Benford's book, "Heart of the Comet", in which researchers land on a comet, and find life. Not *intelligent* life, but something more like fungus. The heat of their station throws the growth patterns of this deep-space-cold adapted life into far overdrive, and wackiness ensues. If you can get life out into the Oort cloud of the star, then maybe some random gravitational interactions with a passing star might break a thing loose and wandering. [/QUOTE]

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