Terra's Big Neighbor

[stevebowers]

By increasing the mass, you make it less likely that the planet will lose all its water. You will probably end up with a hot water world - something like To'ul'h, or a hot ocean world. Make it too big, and you have a hydrogen/helium atmosphere, and it becomes a gas giant. It is difficult to get a large planet in Venus' location to support an Earth-like environment, but it might support some interesting lifeforms.