sciencehabit writes: Not too close, but not too far. That’s long been the rule describing how distant a planet should be from its star in order to sustain life. But a new study challenges that adage: A planet can maintain water and other liquids on its surface if it’s heated, not by starlight, but by radioactive decay, researchers calculate. That opens up the possibility for many planets — even free-floating worlds untethered to stars — to host life, they speculate.
of this story at Slashdot.
Source:: Slashdot