Out of them he computed elements giving "Vulcan" a period of about 20 days, or a formula for heliocentric longitude at any time.
There are two centres, heliocentric and geocentric as the scientists say.
Give a woman ten minutes and she will describe a heliocentric parallax of the heavens.
First, then, it came in the form of the heliocentric theory of the planetary system.
It was not to be expected that his mind would be attracted by the heliocentric theory of Aristarchus.
Why then was the heliocentric theory not definitely accepted?
The heliocentric mechanism of the planetary system was introduced, the earth deposed to a subordinate position.
The heliocentric theory, at this stage, was presenting physical evidence of its truth.
Then they were observed not as the experiences of individuals but as instances of planetary order in a heliocentric system.
The importance of this last discovery was of supreme value, for it confirmed the heliocentric theory.