UNogxada
Iplanethi encane ephakathi nendawo elingana nePluto futhi inamandla amakhulu, okutholakele kwayo kwaholela ekucacisweni kweplanethi.
Local Solar System Foundation · Solar System Scope (CC BY 4.0)
Izwe elibangela abacwaningi be-astronomi ukuba bakhethe ukuthi yini iplanethi, kanye nesizathu sokuthi uPluto wahlukaniswa kabusha.
I-Eris yatholakelwa ngo-2005. I-orbit yayo ephakeme kakhulu, ehamba kancane ithatha kusuka ku-38 kuya ku-98 au ukusuka elanga, futhi orbit eyodwa ithatha cishe iminyaka engu-560.
Incane kakhulu kunePluto. Ukuthola isakhiwo esincane kunaso iNeptune kwaholela emphakathini we-International Astronomical Union ukuba acacise igama leplanethi ngo-2006. Inyanga yayo iDysnomia yenza kube lula ukulinganisa inani layo.
Amasu
Amathuluzi nama-lessons asebenzisa amamodeli alula ukufundela kuphela. Akufanele asetshenziswa ukuhlola, ukuhlela umsebenzi noma noma yiluphi ukhetho lokusebenzela. Izitifiketi zimahhala futhi aziqinisekisiwe. Funda isichazamazwi sezinto ezifundiswayo