Could a binary star system support an earth like planet which is constantly in the habbitable zone?

I am not familiar with binary star systems. Would the second star be able to obscure a planets orbit and keep a planet from staying in the habbitable zone? Or would a planets orbit be constant?





From the binary star systems we have seen what is the average way they form? Do most of them have planets? How many?|||One can think of a few stable scenarios:





- Alpha Centauri: Alpha Centauri A is almost a twin of the Sun. The smaller star Alpha Centauri B is about 20 AU away. This leaves a stable zone close to Alpha Centauri A, that includes the habitable zone.


- A close binary of two stars half the size of the Sun: a planet in orbit around the pair at a distance of 1 AU would be in a stable orbit and in the habitable zone.|||A planet orbiting a binary star system will follow a more eccentric orbit than earth, but it is possible for a planet to still remain in the habitable zone for its entire orbit if the star's masses are just right, the distance between the stars is right, and the planet has the correct distance from the stars. Binary star's can have planets (some have been observed), but they are not as common as planets orbiting single stars (as far as we know).|||In binary star systems the stars have a lot of influence. Mostly the stars are not to close together. The majority has distance from 10 ae (10 times distance earth - sun) to 30.000 ae. There is almost no possible (stable) orbit around 2 stars. Only if the stars are reasonably far away a planet revolving in a stable orbit around 1 star is possible.