EDUCATION

Why do planets stay in their orbit

Earth nine planets me se ek hai jo ki star ke around evolve karta hai.Baki objects sun ke around rocks ke large chunks ki tarah ghumte hai jinhe hum asteroids kehte hai, ice ki balls jise comets kehte hai or dust particles. Yeh sab kuch solar system ko belong karta hai.Hamara solar system milky way galaxy me hai. Hamari galaxy mai or bhi millions of system hai. Milky way ek universe ka part hai. Earth se dekhne par baki sabhi planets flat lagte hain, Par woh ek ball ke shape ki tarah hote hain. Planets do tarah se move karte hai. Woh round position mai spin karte hain jise rotation kehte hain.Har ek planet sun ke around ek path pura karta hai jise hum orbit kehte hain. Solar system ekk force ki wajah se kam karta hai jise hum gravity kehte hain 

Gravity-Sabse greatest force hai earth pe

Jab aap apne hath mein ek pencil pakdte hain,or jab ap usko loose chodte hai woh niche gir jati hai, lekin kya aapne socha hai ki woh hawa mai kyu nahi rehti or niche kyu gir jati hai?

Ek great scientist jiska naam albert einstein tha unhone ise explain kiya ki aisa kyu hota hai, unhone samjhaya ki sab kuch matter ka bana hota hai. Matter ke kuch amount ko hum mass bhi kehte hain. Space mein jin cheezo ka mass zada hota hai woh dusre objects ko apni taraf attract karte hai. Cheezo ko pull krne ki capacity ko hum gravity kehte hai. Kyunki earth ka mass boht zyada hai or uska gravitational pull usse bhi zyada hai. Yeh woh pencil ko earth ke centre ke taraf keechta hai jiski wajah se woh float nahin karti. Aur hume bhi float karne se bachati hai.

sun

Sun jo Earth se million times bada hai us mai enormous amount ka matter hai. Iska mass earth se bahut zyada hai. Sun ka gravitational force bahut hi strong hota hai. Agar sun ka gravitational force zada na hota to sabhi planet straight line mein move karte space mai. Sun ki gravity ki wajah se planets ko sun apni taraf attract krta hai, jo us straight line ki direction ko curve mai badal deta hai. Is hi wajah se planets orbit mai sun ke around move karta hai.

Sun ek bahut badi ball hai jo ki bhot hot gases se bhara hua hai. Sun ke andar ka temperature ek hottest furnace se bhi jyada hota hai. Sun itna zyada hot hota hai ki woh apni heat or light sabhi planets ko solar system mai deta hai.

Planets ke orbits-:

Kuch orbits sun ke pass hote hain baki ke comparatively, aur kuch sun se bahut dur hote hain. jo planets Sun se bahut zyada dur hote hai unhe outer planets kaha jata hai. Planets jo sun ke bahut hi pass hote hain unhen inner planets kaha jata hai. Inner planets khud ke bhi bahut close hote hain jaise ki sun ke. Hamare pass 4 inner planets hai-:

1.     Mercury

2.     Venus

3.     Earth

4.     Mars

Inner planets ke pass hard rocky surface hota hai. Aur yahan per ham spacecrafts ko hard Rocky surface per land karwa sakte hain.5 outer planets jo ki sun se door hi hai woh khud se bhi bahut jyada door hain.

Outer planets mein se 4 planets, inner planets se bahut hi zyada bade Hain-:

●       Jupiter

●       Saturn

●       Uranus

●       Neptune

Scientists ne discover kiya hai ki inn bade planets ka surface solid nahin hota, thoda sa slushy hota hai. Phle ise solar system may discover kiya gaya tha woh Sun se bahut hi zyada door tha jiska name Pluto hai, humein is planet ke bare mein jyada kuch nahi pata par Lekin woh bahut hi jyada cold hai. Pluto outer planets ki tarah nahin Hai, pluto ek mystery hai.

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