cÖeÜ c`v_©| evqy¯—i †f` K‡i Gme nvjKv M¨vmxq c`v‡_©i Af¨š—‡i G‡m †Kv‡bv RxeRš‘i c«vY i¶v Kiv m¤¢e bq| †Kbbv †`‡ni Af¨š—ixY Pvc I ewnf©v‡Mi Pvc m¤ú~Y© c…_K| GB Pv‡ci mgZv i¶v Kiv Rx‡ei c‡¶ KwVb| GQvov EaŸ©vKv‡k i‡q‡Q gnvRvMwZK iwk¥ I Dévcv‡Zi g‡Zv fq¼i I cÖvYniYKvix e¯—y I cÖvYxmg~‡ni fq| wKfv‡e Avjøvn Zvqvjv Zvi wcÖq bex‡K AvKv‡ki jÿ †KvwU M¨vjvw·, Qvqvc_, wbnvwiKvcyÄ, ayg‡KZy, eø¨vK †nvj BZ¨vw` cvi Kwi‡q DaŸ© AvKv‡k me©‡kl ¯’v‡b DcbxZ K‡i‡Qb| weÁv‡bi Rq hvÎvi †Mvovi w`‡K †Kv‡bv †Kv‡bv ‰eÁvwbK wgÕiv‡Ri mZ¨Zv wb‡q KwZcq c«kœ Zy‡j a‡i‡Qb| Zviv e‡j‡Qb : 01. Gravitational force ev gva¨vKl©Y kw³ †f` K‡i †Kv‡bv e¨w³i c‡ÿ Dc‡i DVv m¤¢e bq| 02. Ro RM‡Zi wbqg k…•Ljvq Ave× ¯’~j‡`nx gvby‡li c‡ÿ AvKv‡ki evqy ïb¨¯Íi ågb Kiv Am¤¢e †Kbbv gva¨vKl©Y kw³ ¯’yj‡`n m¤úbœ e¯Íy‡K wb‡Pi w`‡K AvKl©Y K‡i _v‡K| 03. evqy¯Íi cvi nIqvi ci Aw·‡Rb _v‡K bv Avi Aw·‡Rb e¨ZxZ gvby‡li c‡ÿ †e‡Pu _vKv m¤¢e bq| 04. wZwb Kxfv†e AwZ Aí mg†q GZ `xN© c_ AwZµg K†i Avevi wd†i G†jb? GUv Am¤¢e| BZ¨vw`| gnvb Avjvni ¶gZv, m…wói wekvjZv I ‰ewPΨ m¤ú‡K© AÁZv Ges weÁvb m¤ú‡K© mg¨K aviYv bv _vKvi Kvi‡Y Giƒc hyw³i AeZviYv Kiv nq| gva¨vKl©Y kw³i †`vnvB w`‡q wgivR‡K A¯^xKvi Kivi †Póv K‡i‡Q †KD †KD| wKšÍ AvR‡Ki weÁvbxiv Zv c«Z¨vL¨vb K‡i‡Qb| AvR gva¨vKl©Y kw³i Ab¨iƒc e¨vL¨v w`‡”Qb Zviv| Zviv ej‡Qb, k~‡b¨ Aew¯’Z †h †Kv‡bv ¯’~j e¯Íy‡K c…w_ex †h me mgq mgvbfv‡e AvKl©Y Ki‡Z cv‡i bv, Zv AvR cixwÿZ mZ¨| c«‡Z¨K M«‡niB wbR¯^ AvKl©Y kw³ Av‡Q| c…w_exiI AvKl©Y kw³ Av‡Q| Avevi m~h© I Ab¨vb¨ M«‡niI AvKl©Y kw³ i‡q‡Q| m~h© I c…w_ex ci¯úi ci¯úi‡K †U‡b †i‡L‡Q| G UvbvUvwbi d‡j c…w_ex I m~‡h©i gvSLv‡b Ggb GKwU ¯’vb Av‡Q, †hLv‡b †Kv‡bv AvKl©Y I weKl©Y †bB| AZGe, c…w_exi †Kv‡bv e¯Íy hw` G Neutral Zone-G †cŠuQ‡Z cv‡i A_ev G ZiRy gvb 6 gvwmK mxgvbv cvi n‡q m~‡h©i mxgvbvq †h‡Z cv‡i, Zvn‡j Zvi Avi G c…w_ex‡Z wd‡i Avmvi m¤¢vebv †bB| MwZ weÁvb (Dynamics) e‡j, c…w_ex n‡Z †Kv‡bv e¯Íy‡K hw` c«wZ †m‡K‡Û 6.93 A_©vr †gvUvgywU 7 gvBj †e‡M EaŸ©v‡jv‡K Qyu‡o †`qv hvq, Zvn‡j Avi †m c…w_ex‡Z wd‡i Avm‡e bv| Avevi c…w_ex n‡Z †Kv‡bv e¯Íy hZB Dc‡i D‡V hvq, ZZB Zvi IRb K‡g hvq| d‡j AM«MwZ µ‡gB mnR n‡q hv‡e| Arther Clark e‡jb, c…w_ex n‡Z †Kv‡bv e¯Íyi `~iZ¡ hZB ev‡o, ZZB Zvi IRb K‡g| c…w_exi 1 cvDÛ IR‡bi †Kv‡bv e¯Íy 12 nvRvi gvBj E‡aŸ© gvÎ 1 AvDÝ n‡q hvq| G †_‡K ejv hvq †h, c…w_ex n‡Z †h hZ E‡aŸ© Mgb Ki‡e, Zvi ZZB AM«MwZ mnR n‡e| weÁvbxiv c«gvY K‡i‡Qb, NÈvq 25 nvRvi gvBj †e‡M EaŸ©v‡jv‡K QyU‡Z cvi‡j c…w_ex †_‡K gyw³ jvf Kiv hvq| G‡KB gyw³ MwZ (Escape velocity) e‡j| ivm~j mvjøvjøvû AvjvBwn Iqv mvjøvg wgÕivRKvjxb `ywU hv‡b Av‡ivnY K‡ib- gmwR`yj nvivg †_‡K wm`ivZyjgybZvnv (†kl mxgvbv) ch©šÍ Ô †evivKÕ Ges wm`ivZyjgybZvnv †_‡K iveŸyj Avjvgx‡bi mvwbœa¨ ch©šÍ idid| †evivK kãwU ÔeviKybÕ †_‡K D˜MZ, hvi A_©weRwj Ges ÔididÕ A_© Pjgvb wmuwo ev big ZyjZy†j weQvbv, nv`x‡m hvi MwZ Av‡jvi †P‡qI †ewk D†jøL Kiv n†q†Q| Avgiv Rvwb Av‡jvi MwZ c«wZ †m‡K‡Û 1 jÿ 86 nvRvi gvBj| kvwãK A_© we‡ePbvq †eviv‡Ki MwZ AšÍZ Av‡jvi MwZi mgvb wQj| nq†Zv AviI †ewkB wQj| nhiZ gynv¤§` mvjøvjøvû AvjvBwn Iqv mvjøvg †eviv†Ki `ªæZMwZi eY©bv w`†q e‡j‡Qb,Õ †evivK wbR `…wó mxgvi †kl c«v‡šÍ c«wZwU K`g †d†j|Õ BU-Kswµ‡Ui kn‡i gvby‡li `…wó †ewk`~i hvq bv wVKB, wKš‘ `…wói mvg‡b †Kv‡bv AšÍivq bv _vK‡j w`MšÍ †`Lv hvq| Avgiv c…w_ex †_‡K AvKvkI †Zv †`L‡Z cvB| †mUv c«_g AvKvk, mßg AvKv†ki Av‡M wKQy bv _vK‡j c…w_ex †_†KB nq‡Zv mßg AvKvkI †`Lv m¤¢e n‡Zv| Gfv‡e we†kølY Ki†jB ey†S Av‡m †evivK KZ `ªæZMwZi evnb wQj| †eviv‡Ki MwZi c«K…Z Ávb GL‡bv nq‡Zv gvby‡li AR©bB nqwb| Dciš‘ idi‡di MwZ wQj †eviv‡Ki †P‡q K‡qKkZ ¸Y †ewk| Kv†RB ivm~j mvjøvjøvû AvjvBwn Iqv mvjøvg mß b‡fvgÛj, RvbœvZ, Rvnvbœvg me `k©b K‡i G‡mI Ihyi cvwb
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