Comments on: The Far Side https://briankoberlein.com/2016/07/09/the-far-side/ Brian Koberlein Tue, 19 Feb 2019 13:26:59 +0000 hourly 1 https://wordpress.org/?v=5.0.3 By: genialityofevil https://briankoberlein.com/2016/07/09/the-far-side/#comment-4258 Sat, 09 Jul 2016 23:52:08 +0000 https://briankoberlein.com/?p=6077#comment-4258 It started fading out almost as soon as the heliocentric model was developed by Copernicus. As with all scientific theories, it wasn’t very useful once a more natural theory was developed. After Galileo confirmed it through observations, heliocentricism made the counter-Earth irrelevant. So it was disproven about 33 years before Newton was born.

]]> By: Jean Tate https://briankoberlein.com/2016/07/09/the-far-side/#comment-4257 Sat, 09 Jul 2016 20:59:00 +0000 https://briankoberlein.com/?p=6077#comment-4257 If I’m not mistaken, a counter-Earth is featured in quite a few sci-fi stories, with few (if any) being consistent with the astronomical and physics knowledge of the day (i.e. makes such a concept impossible).

Which raises this question, for me: when was the earliest that a counter-Earth could have been robustly ruled-out? Certainly some time after Newton’s publication of the universal law of gravitation, but how much afterwards?

]]> By: Tony Dunn https://briankoberlein.com/2016/07/09/the-far-side/#comment-4256 Sat, 09 Jul 2016 17:35:33 +0000 https://briankoberlein.com/?p=6077#comment-4256 Hi Brian,
Here’s a simulation of this.
Anti-Earth is an Earth-mass planet placed exactly opposite Earth. This just places it at the top of a horseshoe orbit, which like you said, makes it like Janus and Epimetheus.
Don’t increase the time step beyond 16768 or the system will fall apart for different reasons.

http://orbitsimulator.com/gravitySimulatorCloud/simulations/1468085020465_anti_Earth.html

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