Izazi zezinkanyezi zithola amaplanethi amasha nsuku zonke. Kungase kube nezigidigidi zezinhlelo zamaplanethi endaweni yonke. Qhathanisa lezi zinhlelo zamaplanethi ezitholakele nesimiso sethu sonozungezilanga.
Omunye umehluko omkhulu phakathi kohlelo lwethu lwelanga nezinhlelo zeplanethi ezikude kubonakala sengathi yi - eccentricities yemigudu yalawo maplanethi. Amaplanethi asesimisweni sethu sonozungezilanga anemijikelezo eyisiyingi (ene-eccentricities engaphansi kuka-10% kusuka emjikelezweni oyisiyingi ophelele), kanti ama-exoplanets anokufika kwama-50% ama-eccentricities. Ama-exoplanet ane-eccentricity ephezulu angase angabi nokuzinza esikhathini eside. Omunye umehluko wukuthi usayizi ovame kakhulu wama-exoplanet uwusayizi omkhulu womhlaba (okungukuthi usayizi womhlaba ongu-2-3x) kuyilapho isimiso sethu sonozungezilanga singenawo umhlaba omkhulu.