“The Geocentric theory is the obsolete idea that the sun, moon, planets and stars all revolve...Geocentric theory
“The Heliocentric theory was originally the idea that the Sun is at the centre of the Universe...Heliocentric theory
This category has the following 6 subcategories, out of 6 total.
Pages in category "History"
The following 128 pages are in this category, out of 128 total.