Rotation of Earth
Revolution
Solar eclipse
Lunar eclipse
Nickel & Iron
Iron & Copper
Magnesium & Lead
Chromium& Iron
0 hrs
12 hrs
18 hrs
24 hrs
Aryabhatta
Wegener
Galileo
Eratosthenes
Along the Equator
At the North pole
Along the Tropic of Cancer
Along the Arctic Circle
100 Km
111 Km
151 Km
175 Km
Its climate
Its latitude
Its meridian
Its longitude
January 3rd
February 28th
June 21st
December 22nd
The moon
The pole star
The sun
Venus
Geography
Geohistology
Palaeontology
Geochronology