Chapter 12: Dharti ke Paar
Raat ko upar dekho, tumhe taare, grah aur shaayad Chaand dikhega. Is chapter mein hum seekhenge taare kya hain, taaramandal aur Dhruva taara dhoondhenge, saur mandal khojenge, aur vishaal Milky Way aur usse aage ke brahmaand ki kalpana karenge.
Is chapter mein tum
- taare aur taaramandal kya hain samjhaana
- Saptarishi se Dhruva taara dhoondhna
- saur mandal ke grah kram mein batana
- Milky Way aur brahmaand ka varnan karna
Topics
- Taare aur Taaramandal NCERT 12.1
Taare chamakti gas ke bade garam gole hain; Suraj sabse paas ka taara hai.
- Raat ka Aasmaan Dekhna NCERT 12.2
Dharti ghoomne ki wajah se taare poorv se paschim chalte lagte hain.
- Hamara Saur Mandal NCERT 12.3
Aath grah Suraj ki parikrama karte hain: Budh, Shukra, Prithvi, Mangal, Brihaspati, Shani, Arun, Varun.
- Milky Way (Aakaashganga) Galaxy NCERT 12.4
Galaxy arabon taaron ka bada samooh hai; hamari Milky Way hai.
- Brahmaand NCERT 12.5
Brahmaand sab kuch hai: arabon galaxies, har ek mein arabon taare.
Key words
- Star
- gas ka bada garam chamakta gola
- Constellation
- pattern banaata taaron ka samooh
- Pole Star
- Uttari Dhruv ke upar ka taara jo uttar dikhaata hai
- Planet
- taare ki parikrama karne wala bada pind jo pariwartit roshni se chamakta hai
- Satellite
- grah ki parikrama karne wala pind, jaise Chaand
- Galaxy
- arabon taaron ka bada samooh
Summary
- Taare door ke suraj hain; Suraj sabse paas ka taara hai.
- Saptarishi aur Orion jaise taaramandal aasmaan mein raasta dikhaate hain; Dhruva taara uttar dikhaata hai.
- Aath grah Suraj ki parikrama karte hain; chaand, asteroids aur dhoomketu ke saath saur mandal banaate hain.
- Saur mandal Milky Way galaxy ka hissa hai, jo brahmaand ki arabon galaxies mein se ek hai.