Space related theories

[Dominatus]

Any theories such as the sister moon, or the cosmic bow-shock... Interesting, cool theories like these that people may not have heard of. This topic will include hypothesis, theory, and law, so long as these things are backed by evidence, be it mathematical, quantum, observed, etcetera. In short, no conjecture. Just pure science theory/hypothesis.

As I mentioned above, despite my adoration for all things space, several theories have blown past me somehow. The sister earth is one I had never even heard of prior to a clip I watched last night, and confirmed earlier today. The cosmic bow shock I remembered hearing about but not enough was mentioned to stick. These examples are interesting and cool, so I'm looking for related stuff here.

Have fun!

[KerikBalm]

By sister earth, you mean a planet orbiting the sun at Earth's L3 point?

I seem to recall hearing that they couldn't really have any condtions in a planetary formation model that would result in such a scenario.

Unstable during planetary formation, or very divergent mass distribution -> much as Earth was ~10x bigger than Theia.

But the mere existence of Theia makes such an idea seem somewhat plausible.

What would also be fun would be something like Rocheworld... Our moon is just too small for that

Edited October 2, 2014 by KerikBalm

[Dominatus]

Yeah, I'm not sure but I believe the sister moon formed in the Lagrange zone, a rare fluke. And it eventually collided with the moon, a slow collision which didn't result in a crater, more of a squash across the moon forming the highlands.

[lajoswinkler]

Vulcan hypothesis. Small planet inside Mercury's orbit.

[Kryten]

Vulcan hypothesis. Small planet inside Mercury's orbit.

First thought up to account for problems with the procession of Mercury, but GR explained it better. Unfortunately the model from GR matches the real orbit well enough it's extremely unlikely Vulcan exists, at least as an object large enough to call a planet.

[peadar1987]

First thought up to account for problems with the procession of Mercury, but GR explained it better. Unfortunately the model from GR matches the real orbit well enough it's extremely unlikely Vulcan exists, at least as an object large enough to call a planet.

Vulcanoids on the other hand... I would love if we discovered some of them eventually