Looking interesting: https://www.nasa.gov/press-release/nasa ... ets-around
All seven planets are in very close orbits around a dwarf star. They're small and dense, so at least some of them are probably rocky. Three of them are in the sweet spot for having liquid water on the surface.
It's interesting that it's a red dwarf star. On the plus side, those things have an estimated lifespan of at least 60 billion years before they burn out, and they're pretty stable in temperature the whole time. On the minus side, they give off huge radioactive solar flares, and the planets are likely to be tidally locked with one side permanently facing the star.
I REALLY like the idea of three habitable planets, in orbits so close to each other that (at the nearest points) maybe even Apollo-level space technology could get you between them. Even if there's no life there in reality, it's a superb SF setting.
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