Solar system ke planets kaunse hain?
Short mein jawab
Planet ek bada, lagbhag gol object hai jo Sun ke chakkar lagaata hai. Sun se kram mein aath planets hain: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus aur Neptune. Andar ke chaar chhote aur pathreele hain; bahar ke chaar kahin bade, zyaadatar gas aur barf ke aur rings waale hain. Pluto ko ab dwarf planet kehte hain.
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Planet kya hai?
Aasmaan mein sirf taare nahi hain. Dharti aur kuch aur objects, Sun ke saath milkar, hamara Solar System banaate hain, aur inme se zyaadatar Sun ke chaaron taraf ghoomte hain. Kisi object ka Sun ke chaaron taraf ghoomna revolution (parikrama) kehlaata hai. Planet ek bada, lagbhag gol object hai jo Sun ki parikrama karta hai. Dharti ek planet hai: use ek chakkar poora karne mein lagbhag ek saal lagta hai. Parikrama karte hue ye apni dhuri pe bhi ghoomti (rotation) hai, lagbhag 24 ghante mein ek baar, jo ek din hai. Doosre planets bhi parikrama karte hue apni dhuri pe ghoomte hain.
Kram se aath planets
Sun se badhti doori ke kram mein aath planets hain Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus aur Neptune. (Yaad rakhne ka tareeka: My Very Eager Mother Just Served Us Noodles.) Solar System ki tasveerein scale pe nahi hoti: asli size aur dooriyan ek page pe aane ke liye bahut badi hain.
Andar aur bahar ke planets
| Andar ke planets | Bahar ke planets | |
|---|---|---|
| Kaunse | Mercury, Venus, Earth, Mars | Jupiter, Saturn, Uranus, Neptune |
| Size | Chhote | Dharti se kahin bade |
| Kis se bane | Pathreeli, thos satah | Zyaadatar gas aur barf |
| Rings | Nahi | Dhool aur pathreeli cheezon ke bade, chapte rings |
Mars aur Jupiter ke beech asteroid belt hai, jahan kai chhote pathreele objects Sun ke chakkar lagaate hain.
Khaas naam waale planets
- Venus aam taur pe subah-subah aur shaam ko tez chamakta hai, isliye ise Morning Star ya Evening Star kehte hain, halaanki ye taara nahi hai.
- Mars Red Planet hai, kyunki uski mitti laal-si hai.
- Earth Blue Planet hai, kyunki uski satah ka bada hissa paani se dhaka hai aur wo space se neeli dikhti hai.
Nangi aankh se dikhne waale planets ke Bharatiya naam sadiyon se chal rahe hain: Budha (Mercury), Shukra (Venus), Prithvi (Earth), Mangala (Mars), Brihaspati ya Guru (Jupiter) aur Shani (Saturn).
Garam aur thande planets
Planets ko zyaadatar energy Sun se milti hai, isliye aam taur pe jitna door planet, utna thanda. Par atmosphere garmi rok ke planet ka taapmaan bahut badal sakta hai. Isiliye Venus, Mercury se zyaada garam hai, halaanki wo Sun se zyaada door hai.
Pluto ka kya hua?
Pluto, Neptune se bhi aage hai aur Sun ke chakkar lagaata hai, par wo Dharti ke Moon se bhi chhota hai. Jab wo mila tha, use planet kaha gaya. Baad mein uske jaise aur chhote objects mile, isliye 2006 mein IAU ne planet ki paribhasha badli. Pluto aur ye chhote objects ab dwarf planets kehlaate hain.
Aasmaan mein planets dhoondhna
Mercury, Venus, Mars, Jupiter aur Saturn nangi aankh se dikhte hain, par ye bhi taaron jaise chamakte bindu lagte hain. Ek nishaani: taare bahut timtimaate dikhte hain, planets utna nahi. Venus sabse aasaani se milta hai. Sun aur Moon ke baad ye aasmaan ka sabse chamakdaar object hai. Ise sooraj nikalne se pehle east mein ya dhalne ke baad west mein dekho. Binoculars ya telescope se planets zyaada chamakdaar aur bade dikhte hain, aur ve dhundhle objects bhi dikhte hain jo aankh se nahi dikhte; colleges, astronomy clubs, museums aur planetariums ke night sky events mein telescope istemaal karne ka mauka milta hai.
Planets ke moons bhi hote hain, aur Solar System mein kai chhoti cheezein hain. Inke baare mein padho Moon, asteroid aur comet kya hain mein.
Practice karo
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Sun ke sabse paas kaunsa planet hai?
Jawab dekho
Jawab: (c) Mercury
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Kaunsa planet Sun se zyaada door hote hue bhi Mercury se zyaada garam hai?
Jawab dekho
Jawab: (b) Venus Venus ka atmosphere garmi rok leta hai.
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Dharti ko Sun ka ek chakkar lagaane mein kitna samay lagta hai?
Jawab dekho
Jawab: (c) Lagbhag ek saal
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Raat ke aasmaan mein planet aur taare mein fark kaise karoge?
Jawab dekho
Jawab: Taare bahut timtimaate dikhte hain, planets utna nahi. Venus bahut chamakdaar bhi hai aur sooraj nikalne se pehle east mein ya dhalne ke baad west mein dikhta hai.
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Mars ko Red Planet aur Dharti ko Blue Planet kyun kehte hain?
Jawab dekho
Jawab: Mars ki mitti laal-si hai, isliye wo laal dikhta hai. Dharti ki satah ka bada hissa paani se dhaka hai, isliye wo space se neeli dikhti hai.
Students ke sawal
Solar System mein kitne planets hain?
Aath: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus aur Neptune, Sun se doori ke kram mein.
Pluto ko ab planet kyun nahi kehte?
Pluto Dharti ke Moon se bhi chhota hai. Jab uske jaise aur chhote objects mile, to IAU ne 2006 mein planet ki paribhasha badli, aur Pluto aur ye objects dwarf planets kehlaaye.
Kaunse planets nangi aankh se dikhte hain?
Mercury, Venus, Mars, Jupiter aur Saturn. Venus sabse aasaani se dikhta hai: Sun aur Moon ke baad ye aasmaan ka sabse chamakdaar object hai.
Revolution aur rotation mein kya fark hai?
Revolution matlab Sun ke chaaron taraf ghoomna; Dharti ko lagbhag ek saal lagta hai. Rotation matlab apni dhuri pe ghoomna; Dharti ko lagbhag 24 ghante lagte hain, jo ek din hai.
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