चन्द्रमा उपग्रह

thumb|250px|chandrama grah
Moon

• is grah ko aangrezi mean Moon kahate haian.
• chandrama prithvi ka ekamatr upagrah hai.
• yah sauramandal ka pachavaan sabase vishal prakritik upagrah hai.
• chandrama ki satah aur usaki antarik satah ka adhyayan karane vala vijnan selenol aauji kahalata hai.
• is par dhool ke maidan ko shantisagar kahate haian. yah chandrama ka pichhala bhag hai, jo aandhakaramay hota hai.
• chandrama ka uchchatam parvat libanitj parvat hai, jo 35000 phut (10,668 mi0) ooancha hai. yah chandrama ke dakshini dhruv par sthit hai.
• chandrama ko jivashm grah bhi kaha jata hai.
• chandrama prithvi ki ek parikrama lagabhag 27 din aur 8 ghante mean poori karata hai aur itane hi samay mean apane aksh par ek ghoornan karata hai. yahi karan hai ki chandrama ka sadaiv ek hi bhag dikhaee p data hai. prithvi se chandrama ka 57% bhag dekha ja sakata hai.
• chandrama ka aksh tal prithvi ke aksh ke sath 58.48º ka aksh kon banata hai. chandrama prithvi ke aksh ke lagabhag samanantar hai.
• chandrama ka vyas 3,480 kimi. tatha dravyaman, prithvi ke dravyaman ka lagabhag 1/8 hai.

thumb|250px|left|chandr grahan
Moon Eclipse

• prithvi ke saman isaka parikraman path bhi dirgh vrittakar hai.
• soory ke sandarbh mean chandrama ki avadhi 29.53 din (29 din, 12 ghante, 44 minat aur 2.8 sekend) hoti hai. is samay ko ek chandramas ya sainodik mas kahate haian.
• nakshatr samay ke drishtikon se chandrama lagabhag 27½ din (27 din, 7 ghante, 43 minat aur 11.6 sekend) mean punah usi sthiti mean hota hai. 27½ din ki yah avadhi ek nakshatr mas kahalati hai.
• jvar uthane ke lie apekshit saur evan chandrama ki shaktiyoan ke anupat 11:5 haian.
• opolo ke aantariksh yatriyoan dvara lae ge chattanoan se pata chala hai ki chandrama bhi utana hi purana hai, jitani ki prithvi (lagabhag 460 karo d varsh). isaki chattanoan mean taiteniyam ki matra atyadhik matra mean payi gayi hai.

panne ki pragati avastha

adhar

prarambhik

madhyamik

poornata

shodh