Kya Kabhi Socha Aapne?
Raat ko aasman ki taraf dekhte hain taare nazar aate hain aur ek ajeeb si feeling aati hai ke yeh sab kitna bada hai. Lekin asal mein universe kitna bada hai yeh sochna bhi mushkil hai.
Aaj hum koshish karenge ke universe ki wusat ko bilkul simple andaz mein samjhein aise numbers aur misaalon ke saath jo shayad aapka dimaag ghuma dein lekin saath mein ek ajeeb khubsoorat feeling bhi paida karein!
Pehle Chhote Se Shuru Karte Hain
Universe ki wusat samajhne ke liye pehle chhoti chhoti distances se shuru karte hain aur phir dheere dheere bade hote jaate hain warna dimaag seedha hi kaam karna band kar dega!
Hamare ghar se school ya office tak ka fasla shayad kuch kilometers hoga. Pakistan ka ek sar se doosre sar tak ka fasla roughly 1800 kilometer hai. Poori Zameen ka diameter roughly 12,742 kilometer hai agar aap Zameen ki surface par chalte jayen toh roughly 40,000 kilometer chalke aap wapas usi jagah pohonchenge. Yeh baat sun kar lagta hai ke Zameen bohat badi hai lekin yeh sirf shuruwaat hai!
Zameen Se Chaand Tak
Zameen se Chaand ki doori roughly 384,000 kilometer hai. Agar aap car mein 100 kilometer per ghante ki speed se chalein toh Chaand tak pohonchne mein roughly 160 din lagenge baghair ruke!
Apollo astronauts ne yeh safar roughly 3 din mein Tay kiya tha kyunke unka spacecraft bohat tezi se ja raha tha. Yeh distance sun kar bohat zyada lagti hai lekin solar system ke scale par yeh bilkul chhoti si doori hai.
Zameen Se Suraj Tak
Zameen se suraj ki doori roughly 150 million kilometer hai yeh itna zyada hai ke ise ek khaas unit mein measure karte hain jise Astronomical Unit yaani AU kehte hain. Zameen suraj se 1 AU door hai.
Suraj ki roshni jo poori kaainaat mein sabse tezi se chalti hai 300,000 kilometer per second ki speed se chalti hai. Phir bhi suraj ki roshni Zameen tak pohonchne mein roughly 8 minutes 20 seconds lagte hain. Matlab jab aap suraj dekhte hain toh aap asal mein suraj ko 8 minute pehle ka dekh rahe hote hain!
Light Year Doori Napne Ka Zabardast Tarika
Jab distances itni zyada ho jaati hain ke kilometers mein likhna mushkil ho jaaye toh scientists ek khaas unit use karte hain light year.
Light year woh doori hai jo roshni ek saal mein tay karti hai. Roshni ek second mein 300,000 kilometer chalti hai toh ek saal mein roughly 9.46 trillion kilometer chalti hai. Yeh ek light year hai.
Hamare sabse qareeb taara suraj ke ilawa Proxima Centauri hai.Yeh Zameen se roughly 4.24 light years door hai. Matlab agar aaj roshni ki speed se safar shuru karein toh 4.24 saal mein wahan pohonch sakte hain. Lekin hamare paas abhi aisi technology nahi hamare fastest spacecraft se wahan pohonchne mein roughly 70,000 saal lagenge!
Hamari Milky Way Galaxy
Hamare solar system ke gird aur bhi bohat saare taare hain yeh sab mil kar hamari Milky Way galaxy banaate hain.
Milky Way mein roughly 200 se 400 billion taare hain aur hamaara suraj in mein se sirf ek hai. Milky Way ka diameter roughly 100,000 light years hai matlab roshni ki speed se ek sar se doosre sar tak pohonchne mein 100,000 saal lagenge.
Hamaara solar system Milky Way ke center se roughly 26,000 light years door hai ek taraf. Milky Way ka ek chakkar lagane mein hamaare solar system ko roughly 225 million saal lagte hain yeh ek Galactic Year kehlata hai.
Agar Milky Way ko ek football field ki tarah sochen aur hamaare solar system ko ek pin ke sar jitna chhota toh hamari pin football field ke roughly aadhe mein kahin hogi!
Andromeda Hamare Sabse Qareeb Galaxy
Hamari Milky Way ke qareeb doosri galaxies bhi hain. Sabse mashoor aur qareebi badi galaxy Andromeda hai jo roughly 2.537 million light years door hai.
Andromeda itna door hai ke roshni ko wahan se Zameen tak pohonchne mein 2.5 million saal lagte hain. Matlab jab hum Andromeda ko dekhte hain toh hum use 2.5 million saal pehle ka dekh rahe hote hain yeh telescope ek tarah ka time machine hai!
Ek hairat angez baat Andromeda aur Milky Way ek doosre ki taraf aa rahe hain. Roughly 4.5 billion saalon mein yeh dono galaxies aapas mein takra jayengi aur merge ho jayengi ek badi nai galaxy ban jayegi. Lekin ghabrana nahi tab tak Zameen bhi wajood mein nahi rahegi kyunke suraj bhi usi waqt apni life khatam kar chuka hoga!
Observable Universe Hum Kitna Dekh Sakte Hain
Yahan ek bohat zaroori concept samajhna zaroori hai observable universe.
Universe shayad infinite hai lekin hum sab kuch nahi dekh sakte kyunke roshni ko door se door tak pohonchne mein waqt lagta hai. Universe roughly 13.8 billion saal pehle bana toh hum sirf usi roshni ko dekh sakte hain jo 13.8 billion saalon mein hamaare paas pohonchi ho.
Isliye hamaare observable universe ka diameter roughly 93 billion light years hai yeh woh area hai jis ke bahar ki roshni abhi tak hamaare paas nahi pohonchi. Is se bahar kya hai woh abhi bhi ek raaz hai.
Is observable universe mein roughly 2 trillion galaxies hain yaani 2,000,000,000,000 galaxies! Aur har galaxy mein average roughly 100 billion taare hain. In numbers ko ek doosre se zarb karein toh taaron ki aisi tadaad nikalti hai jo Zameen ki sari beaches ki ret ke zarron se bhi zyada hai!
Universe Phail Raha Hai Aur Tezi Se
1929 mein scientist Edwin Hubble ne daryaft kiya ke poori galaxies ek doosre se door hoti ja rahi hain matlab universe phail raha hai!
Aur 1998 mein ek aur bohat badi discovery hui universe sirf phail nahi raha yeh tezi se phail raha hai! Yeh expansion rokne ki bajaye aur tez hoti ja rahi hai. Scientists ne is expansion ki wajah ko dark energy ka naam diya lekin asal mein koi nahi jaanta ke dark energy kya hai. Yeh universe ki energy ka roughly 68 percent hai lekin abhi bhi ek raaz hai!
Iska matlab yeh hai ke future mein doosri galaxies aur zyada door hoti jaayengi. Billions of saalon mein galaxies itni door ho jaayengi ke hamari Milky Way se unka koi signal nahi pohonch payega woh observable universe se bahar chali jaayengi.
Dark Matter Ek Aur Raaz
Universe mein jo kuch hum dekh sakte hain taare، galaxies، planets yeh sab poori universe ka sirf 5 percent hai.
Baaki 27 percent dark matter hai jo nazar nahi aata lekin gravity se detect hota hai. Aur 68 percent dark energy hai jo universe ko phailane ki wajah hai. Matlab hum jo kuch bhi jaante hain taare، galaxies، planets، aap aur main yeh sab sirf 5 percent hai!
Yeh ek bohat sochne wali baat hai hum jo kuch bhi jaante hain woh asal universe ka sirf ek chhota sa hissa hai.
Universe Ki Umar Kab Bana
Universe roughly 13.8 billion saal pehle ek bohat bade dhamake se bana jise Big Bang kehte hain. Shuruwaat mein universe bohat chota aur bohat garam tha phir phailna shuru hua.
Pehle atoms bane، phir taare bane، phir galaxies bani aur roughly 4.6 billion saal pehle hamaare suraj aur Zameen ne janam liya.
Zameen ki umar universe ki umar ka roughly ek tehai hai matlab universe aur bhi bohat pehle se maujood tha jab Zameen bhi nahi bani thi!
Comparison Samajhne Ka Ek Tarika
Universe ki wusat ko samajhne ke liye ek comparison karte hain.
Agar poori universe ki umar 13.8 billion saal ko ek saal mein compress karein toh Big Bang 1 January ko hua، Milky Way February mein bani، hamaara solar system September mein bana، Zameen par zindagi shuru hui October mein، dinosaurs December 25 ko aaye، aur poori insani history December 31 ki raat ke aakhri 10 seconds mein hui!
Yeh soch kar ek ajeeb si feeling aati hai ke hum is bohat badi aur purani kaainaat mein ek bilkul chhote se waqt ke liye aaye hain!
Aakhri Baat Chhote Hain Lekin Sochne Wale Hain
Universe itna bada hai ke numbers samajhna bhi mushkil hai 93 billion light years، 2 trillion galaxies، 400 billion taare sirf ek galaxy mein.
Lekin ek bohat dilchasp baat yeh hai ke is poori badi kaainaat mein jahan hum ek chhoti si Zameen par ek chhote se taare ke gird ghoom rahe hain hum aise insaan hain jo kaainaat ko samajhne ki koshish kar rahe hain.
Kaainaat bohat badi hai lekin hamari soch aur hamari curiosity shayad is se bhi badi hai!
Agli baar jab raat ko aasman dekhein aur taare ginen yaad karain ke aap sirf ek choti si Zameen par nahi aap ek 93 billion light years badi kaainaat ka hissa hain aur yeh kaainaat utni hi hairat angez hai jitna aap soch sakte hain!
source: SN COVER
Jab universe itna bada hai 2 trillion galaxies aur har galaxy mein billions of taare toh ek sawaal zaroor zihn mein aata hai ke kya hum is poori kaainaat mein akele hain? Kya koi aur bhi hai wahan bahar? Agar aap is dilchasp sawaal ka jawab jaanna chahte hain toh hamare is article mein zaroor parein Aliens Haqeeqat Ya Afsana science kya kehti hai، kya evidence hai aur Fermi Paradox kya hota hai sab kuch simple aur asan andaz mein samjhaya gaya hai!