Nceda uqaphele, kukho umrhumo wokungena entendeni ukuma kwi-Prime Meridian Line.
Ngethuba lezithombe zeklasi: yenza isithunzi sakho sithathwe ngokuma kwi-Prime Meridian Line e-Greenwich. Intloko yeRoyal Observatory kunye nasentendelezo yinqanaba lensimbi apho umele phezu komgca kwaye unakho kwimpuma ye-hemispheres ngasentshonalanga. I-Greenwich yanyulwa emva kwe-1884 njenge-Prime Meridian yehlabathi, i-Longitude Zero (0 ° 0 '0 ").
Zonke indawo emhlabeni zilinganiswa ngokwemigca yayo empuma okanye entshonalanga ukusuka kulo mgca (ubude), njengoko i-Equator ihlula i-hemispheres esenyakatho kunye nezantsi.
Enye i-freebie ejabulisayo ngelixa ukhona ukubukela ibhola eliBomvu phezulu kwi-Flamsteed House yehla ngo-1pm nsuku zonke. Ngo-12.55pm, ibhola lexesha liphakama i-half-way up to the mast. Ngo-12.58pm sifinyelela phezulu, kwaye ngo-1pm impela, ibhola iyawa, kwaye inika umqondiso kwiinqanawa ezidlula kunye nabani na oza kwenzeka.
Jonga uhambo lwe-Greenwich ukuze uthole iinkcukacha ezingaphezulu.
Ukuba ukunyuka kwentaba kwiGreenwich Park ukuya kwiRoyal Observatory akukwanele kuwe kwaye ufuna ukunyuka ngokwenene ukuba kutheni ungaqwalasela ukunyuka kwe-O2 kwi- Up kwi-O2 ?