Red Dwarf with planet orbiting larger star.

[Dartz]

While playing with the Ubox I created a system in which a red dwarf star orbits fairly close to the habitable zone of a 1 solar mass star. A planet then orbits the red dwarf once every 15 days, in the habitable zone.

First, what would the climate on such a planet be like? With one side of the planet being bathed in constant sun-light, with two suns for about 7.5 days at a time, and the other side having a day-night cycle.

Secondly, if life can evolve, how would this set-up effect it, especially plant life? What I've researched suggests that plants near a red dwarf should be black due to the type of light being taken in. What would taking in light from a Sun-like star and a red dwarf do?

[Cosmos]

It would be a humid, and windy place. Likely dry as well. The sky will seem dim even in day, and day and nighttime last months. The prevailing creature is the mysterious land whale, which digests the high winds on the planet like a vacuum, and sticks to the dirt like a sponge.

[Xriqxa]

Ummm anything that close would probably be covered in magma, have it's atmosphere blown away, and possibly even be evaporated by the Roche Limit of the red star.

[Dartz]

Ummm anything that close would probably be covered in magma, have it's atmosphere blown away, and possibly even be evaporated by the Roche Limit of the red star.

The roche limit for a star 16% the mass of the Sun is 1.39 Million Kilometers, for an object less dense than water. That's a 19 hour orbit. A 15-day orbit is 9.92 Million Kilometers, and near the outer edge of the habitable zone.

[Xriqxa]

It would still be covered in lave and have no atmosphere.

[adtdeveloping]

It would still be covered in lave and have no atmosphere.

No. as he said its in teh habitable zone. Of both the stars. Meaning. It could get hotter then on earth. But it wont a ball of lava. Not even close.

[Shriqua]

I think I can see the mistake Xriqxa made. I think he thought that the planet orbits very close to the star that orbits in the habitable zone.

But anyway, for a planet to be in both habitable zones it would have a very unstable orbit, also when it crossed over the intersections of the H-Zones it would get really hot.

I'm afraid to tell you but I don't think such a planet could exist.