I-Astronomy

I-Pluto Ezifundweni Zezinkanyezi Iplanethi i-Pluto ingenye yezinto ezithakazelisayo kakhulu emlandweni wezinkanyezi zanamuhla. Yayibhekwa njengeplanethi yesishiyagalolunye ohlelweni lwelanga, yabe "yehliswa" yaba yisimo seplanethi encane. Kodwa-ke, lolu shintsho encazelweni aluzange lunciphise inani lesayensi likaPluto. Ngokuphambene nalokho: I-Pluto isebenza njengendawo ebalulekile yokungena ekuqondeni izifunda zangaphandle zesistimu yelanga, amandla e… Funda kabanzi

Amaplanethi amancane ku-astronomy yanamuhla Igama elithi iplanethi encane lizwakala lilula—njengokungathi lisho nje “iplanethi encane.” Kodwa ku-astronomy yanamuhla, iplanethi encane iyisigaba sesayensi esinencazelo ezalwa yimpikiswano ende, intuthuko kwezobuchwepheshe bokubuka, kanye nezinguquko endleleni abantu abadweba ngayo i-Solar System. Kusukela ekuqaleni kwekhulu lama-21, amaplanethi amancane abe ngelinye lawa… Funda kabanzi

Izinkathi Ezinhlotsheni Zeplanethi Esimisweni Selanga Izinkathi ziyizinguquko ezimweni zezulu ezenzeka ngezikhathi ezithile unyaka wonke. EMhlabeni, sinezinkathi ezine—intwasahlobo, ihlobo, ikwindla, kanye nobusika—ezithonywa kakhulu ukuthambekela kokujikeleza koMhlaba maqondana nendiza yokujikeleza kwawo ezungeze iLanga. Kodwa kuthiwani ngamanye amaplanethi esimisweni selanga? Ingabe nawo abhekana nezinkathi? Impendulo inguyebo, … Funda kabanzi

Ukuthambekela kwe-axis yokujikeleza kweplanethi—okuvame ukubizwa ngokuthi ukuthambekela kwe-axial noma ukungabonakali—kungenye yemingcele ebaluleke kakhulu ekunqumeni "ubuso" beplanethi. Kuthinta ubude bemini nobusuku, amaphethini esizini, ukusatshalaliswa kwamandla elanga ebusweni, ngisho nokuguquguquka kwesimo sezulu sesikhathi eside. Kuhlelo Lwelanga, iplanethi ngayinye inokuthambekela okuhlukile kwe-axial, kusukela cishe ku-… Funda kabanzi

Ukugqama Kwemijikelezo Yeplanethi Uma sicabanga ngamaplanethi ejikeleza inkanyezi, isithombe esivame ukufika engqondweni indlela ehlelekile nezinzile eyindilinga. Eqinisweni, imijikelezo eminingi yamaplanethi ayindilinga ngokuphelele. Ngokuvamile iyiziyingi—njengendilinga “eyeluliwe” ohlangothini olulodwa. Isilinganiso sokuthi i-ellipse “i-elliptical” kangakanani sibizwa ngokuthi ukugqama kwe-orbit. Lo mqondo ubonakala ulula, kodwa… Funda kabanzi

Ukuzinza Kweplanethi Ejikelezayo Ukuzinza kweplanethi ejikelezayo kungenye yezihloko ezibaluleke kakhulu ku-astronomy kanye ne-astronomy dynamics. Uma sibheka uhlelo lwelanga, amaplanethi abonakala ehamba njalo ezungeze iLanga eminyakeni eyizigidigidi. Lokhu kuvumelana akulona iphutha, kodwa kunalokho kuwumphumela wemithetho yamandla adonsela phansi, izimo zokuqala zokwakheka kohlelo lwelanga, kanye nokusebenzisana okuyinkimbinkimbi phakathi kwamaplanethi nezinye izidalwa zasezulwini. … Funda kabanzi

Umsindo We-Orbital Ezinhlelweni Zeplanethi Umsindo we-orbital ungenye "yezilimi ezifihliwe" ezisetshenziswa amandla adonsela phansi ukwakha ukwakheka kwezinhlelo zeplanethi. Kuchaza ukuthi kungani ezinye izinyanga ziboshwe emaphethini athile okunyakaza, ukuthi kungani amasongo eplanethi angaba nezikhala ezihlanzekile, nokuthi kungani ezinye izinhlelo ze-exoplanetary zibonakala zihlelekile njengesikali somculo. Kulesi sihloko, sizoxoxa... Funda kabanzi

Ukusebenzisana Kwamandla Adonsela Phansi Phakathi Kwamaplanethi Amandla adonsela phansi angamandla abonakala "engabonakali", kodwa alawula ukuhleleka endaweni yonke. Ngaphakathi kweSistimu Yelanga, ukusebenzisana kwamandla adonsela phansi phakathi kwamaplanethi kusebenza njengenethiwekhi eqhubekayo yokulwa. Ngaphandle kwamandla adonsela phansi, amaplanethi abengeke azungeze iLanga, izinyanga bezingeke zijikeleze amaplanethi azo ngokwethembeka, futhi izakhiwo zendandatho, ama-asteroid, ngisho nama-comet bekuzohamba… Funda kabanzi

Ithonya Lamandla Adonsela Phansi Lelanga Emaplanethini Amandla adonsela phansi eLanga “yintambo engabonakali” ebamba uhlelo lwelanga ndawonye. Ngaphandle kokudonsa kwamandla adonsela phansi kweLanga, amaplanethi abengeke alondoloze imijikelezo ezinzile, kodwa esikhundleni salokho abezophambuka kakhulu endleleni bese ephonswa esikhaleni sezinkanyezi. Kodwa ithonya lamandla adonsela phansi leLanga aligcini nje “ngokubamba” amaplanethi ndawonye; libumba imijikelezo yawo, linqume... Funda kabanzi

Imithetho KaKepler Yokuhamba Kweplanethi Ukunyakaza kwamaplanethi azungeze iLanga sekuyisikhathi eside kungenye yezinkinga ezinkulu kakhulu kwezesayensi. Sekungamakhulu eminyaka abantu bebona izikhundla ezishintshayo zamaplanethi esibhakabhakeni sasebusuku, bezama ukuqonda amaphethini nemithetho engemuva kwawo. Ingqophamlando ebalulekile emlandweni wezinkanyezi yafika lapho uJohannes Kepler (1571–1630) esungula imithetho emithathu echaza ukunyakaza kwamaplanethi ngendlela ephelele… Funda kabanzi