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> Assuming random distribution, there's probably thousand fold amount of off plane planets. For a star like ours with a single Earth-size planet at 1AU, the od
by flashman 11y ago
> Assuming random distribution, there's probably thousand fold amount of off plane planets.
For a star like ours with a single Earth-size planet at 1AU, the odds of observing a transit are 0.47%. There is a page devoted to this question which gives some idea of the variables involved: http://certificate.ulo.ucl.ac.uk/modules/year_one/NASA_Kepler/character.html http://certificate.ulo.ucl.ac.uk/modules/year_one/NASA_Keple...
- Gravityloss 11y agoThanks, that's an excellent response! Assuming a constant density of earth like stars, a density of 200 earth likes in a 1500 light year sphere would mean one earth like in 250 light year sphere. Assuming a disk instead, it would be about 100 light years. Don't know how it relates to the local star neighbourhood... https://en.wikipedia.org/wiki/Orion_Arm https://en.wikipedia.org/wiki/Orion_Arm Of course, sampling from this small amount of data is pretty prone to problems...