देशान्तर
deshantar glob par uttar se dakshin ki or khianchi jane vali kalpanik rekhaean hai. ye rekhaean samanantar nahian hoti haian. prithvi ke bicho-bich 0 digri par khianchi gee ye rekhaean 'madhyahn rekha' ya 'grinavich rekha' kahalati haian. duniya ka manak samay bhi isi rekha se nirdharit kiya jata hai. ek deshantar ka antar hone par samay mean 4 minat ka antar hota hai. chooanki prithvi pashchim se poorab ki or ghoomati hai. phalatah poorab ki or badhane par pratyek deshantar par samay 4 minat badhata jata hai tatha pashchim mean jane par pratyek deshantar par samay 4 minat ghatata jata hai.
- deshantar rekhaean uttari tatha dakshini dhruv par ek bindu par mil jati haian.
- dhruvoan se vishuvat rekha ki or badhane par deshantaroan ke bich ki doori badhati jati hai.
- vishuvat rekha par inake bich ki doori adhikatam (111.32 kimi.) hoti hai.
- grinavich vedhashala se gujarane vali rekha ko 0° deshantar mana jata hai.
- isaki bayian ki or ki rekhaean pashchimi deshantar aur dahini or ki rekhaean poorvi deshantar kahalati haian.
- deshantar ke adhar par hi kisi sthan ka samay jnat kiya jata hai.
- do deshantar rekhaoan ke bich ki doori 'gore' nam se jani jati hai.
- duniya ka manak samay bhi isi rekha se nirdharit kiya jata hai.
- landan ka shahar 'grinavich' isi rekha par sthit hai, isaliy ise grinavich rekha kahate hai.
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tika tippani aur sandarbh
sanbandhit lekh
ek deshantar ka antar hone par samay mean 4 minat ka antar hota hai. chooanki prithvi pashchim se poorab ki or ghoomati hai. phalatah poorab ki or badhane par pratyek deshantar par samay 4 minat badhata jata hai tatha pashchim mean jane par pratyek deshantar par samay char minat ghatata jata hai.