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Monthly Archives: April 2009
Armillary sphere
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of the celestial sphere. read on…
Posted in Solar System
1 Comment
Sidereal time
As the Earth rotates from west to east around its axis once every 23 hours 56 minutes, the celestial sphere and all objects on it appear to rotate from east to west around the celestial poles in the same time. … Continue reading
Posted in Solar System
2 Comments
WWF Campaign: Deforestation and Lungs
World Wildlife fund (WWF) campaigns are always interesting.There was paper Panda campaign where cute paper Pandas were put in parts of cities to create awareness about the dwindling number of the species. The message was loud and clear.This time again … Continue reading
Posted in BIODIVERSITY, Ecosystem
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Celestial sphere
In astronomy and navigation, the celestial sphere is an imaginary rotating sphere of “gigantic radius”, concentric and coaxial with the Earth. All objects in the sky can be thought of as lying upon the sphere. Projected from their corresponding geographic … Continue reading
Rashid's Blog: A Place for Inquisitive Souls 