Build mighty ships, menacing space stations and vast planetary settlements to explore, conquer or exploit a variety of different planets and the allegedly empty space! Fight human, alien and biological hazards and survive in a hostile galaxy full of hidden dangers - on your own or with your friends. J.Empyrion - Galactic Survival is a 3D open world space sandbox survival adventure. 55 Cancri: a coplanar planetary system that is likely misaligned with its star. Formation and evolution of planetary systems in presence of highly inclined stellar perturbers. The Kozai mechanism and the stability of planetary orbits in binary star systems. HD 80606 b, a planet on an extremely elongated orbit.
High-eccentricity planets from the Anglo-Australian Planet Search. A search for wide visual companions of exoplanet host stars: the Calar Alto survey. Two suns in the sky: stellar multiplicity in exoplanet systems. Observational results of a VLT/NACO search for stellar companions to 130 nearby stars with and without planets. The impact of stellar duplicity on planet occurrence and properties. Unbound or distant planetary mass population detected by gravitational microlensing. The Microlensing Observations in Astrophysics (MOA) Collaboration & The Optical Gravitational Lensing Experiment (OGLE) Collaboration. Images of a fourth planet orbiting HR 8799. Shrinking binary and planetary orbits by Kozai cycles with tidal friction. Planet migration and binary companions: the case of HD 80606b. Chaotic variations in the eccentricity of the planet orbiting 16 Cygni B. Secular perturbations of asteroids with high inclination and eccentricity. Predictions for outer extrasolar planetary systems. Planet-planet scattering in planetesimal disks. On the origin of eccentricities among extrasolar planets. Origins of eccentric extrasolar planets: testing the planet-planet scattering model. Dynamical origin of extrasolar planet eccentricity distribution. Ten new and updated multiplanet systems and a survey of exoplanetary systems. Symplectic integrator algorithms for modeling planetary accretion in binary star systems. Excitation and propagation of eccentricity disturbances in planetary systems. Constraints on the birth aggregate of the Solar System. Reassessing the source of long-period comets. The influence of the galactic tidal field on the Oort comet cloud. The structure of the cloud of comets surrounding the Solar System and a hypothesis concerning its origin.
The effect of encounters on the eccentricity of binaries in clusters. Extrasolar planets in stellar multiple systems. Consequently, our results suggest that although wide binaries eventually remove the most distant planets from many planetary systems, most isolated giant exoplanet systems harbour additional distant, still undetected planets. Both eccentricity distributions are well reproduced when we assume that isolated stars and wide binaries host similar planetary systems whose outermost giant planets are scattered beyond about 10 au from their parent stars by early internal instabilities. Although hitherto not recognized, orbits of giant exoplanets within wide binaries are statistically more eccentric than those around isolated stars. Contrary to previous understanding 2, wide binary companions may often strongly perturb planetary systems, triggering planetary ejections and increasing the orbital eccentricities of surviving planets. Here we report numerical simulations demonstrating that the variable nature of wide binary star orbits dramatically reshapes the planetary systems they host, typically billions of years after formation.
Unlike their tighter counterparts, the stellar orbits of wide binaries continually change under the influence of the Milky Way’s tidal field and impulses from other passing stars. Nearly half the exoplanets found within binary star systems reside 1 in very wide binaries with average stellar separations greater than 1,000 astronomical units (one astronomical unit ( au) being the Earth–Sun distance), yet the influence of such distant binary companions on planetary evolution remains largely unstudied.