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Showing posts from April, 2015

The Fascinating Worlds of the Milky Way

With over 100 billion Earth-like planets now thought to exist in the Milky Way, the possibilities for worlds that escape our imagination seem endless. These are some of the fascinating, naturally occurring and physically possible habitable worlds of our galaxy, some of which writers have imagined and others which scientists have predicted:

1. Rocheworlds
Two planets so close together they share a common atmosphere.






How? Ever seen that scene from The Time Machine movie (2002) in which the lunar demolitions set our Moon off orbit and is it approaches the Earth it starts breaking up? It disintegrates as a result of having reached the Roche limit: the point in which the Moon's gravity (83.3% less than Earth's) is no longer sufficient to make it hold itself together due our planet's stronger gravity exceeding that of the Moon, ripping it off.


However, in theory, if you had two planets with roughly the same gravity (same mass and density), their Roche limit would be sufficiently sma…