Real-life sci-fi worlds #3: the oscillating Earth

Welcome to Real-life Sci-fi worlds.  We are using science to explore life-bearing worlds that are the settings for science fiction stories.  Up today: the oscillating Earth. Setting Earth’s orbit is not fixed.  Gravitational kicks from the other planets change the shape of Earth’s orbit.  Earth’s orbit oscillates between being perfectly circular (having an “eccentricity” of … More Real-life sci-fi worlds #3: the oscillating Earth

Real-life sci-fi worlds #1: the eccentric Earth

Welcome to Real-life Sci-fi worlds.  We are using science to explore life-bearing worlds that are good settings for science fiction. Let’s take the Earth and change just one small characteristic: the shape of its orbit. Setting. Earth’s orbit is nearly a perfect circle.  Earth is always the same distance from the Sun (to within a … More Real-life sci-fi worlds #1: the eccentric Earth