A Ptolemaic view of the Universe has the Earth at it's centre.
The Copernican centres on the sun. Both however have been found to be incorrect.
The difference between a shogun and a samurai is like the difference between a king and a knight.
Before Rome, the two regions that had control of Judea were the Seleucid Empire, which was based in present-day Syria, and the Ptolemaic Kingdom, which was based in present-day Egypt.
there is no difference between this two...
A question about "the difference between" requires two objects!
Explain the difference between the vassals and the serfs
The Ptolemaic system belived that the earth was the center of everything and all the planet and sun traveled around it and the copernican system belived that the sun was the center of everything and the planets and traveled around the sun.
The Ptolemaic theory and the Copernican Theory.
there is no difference. they are both 42.
expansion difference
The heliocentric 'theory' is not really a theory at all, more an assertion that the Sun is at the centre of the solar system. Copernicus's theory assumes that the Sun is at the centre and provides a model of the planets' orbits that uses circles and epicycles to explain the observed orbits. He said it was simpler than the old "geocentric" (Earth centred) Ptolemaic system, but it was not really, it actually had more epicycles. Note: Perhaps the questioner got mixed up. The Copernican theory IS a heliocentric theory. Perhaps the question is about the geocentric theory and the Copernican theory. Anyway, Kepler simplified the heliocentric theory and now we know that his model is correct.
Without the difference between scalars and vectors the Universe doesn't work !
A galaxy contains billions of stars. A universe contains billions of galaxies.
The Universe is much larger, and contains many solar systems.
The difference between Ptolemy's and Copernicus's model was that, Ptolemy's model had the Earth in the middle of the Solar System, with all the other planets (including the Sun and the moons) revolving around it. In Copernicus's model, he had the Sun in the center of the Solar System.
They thought it was a explosion in the universe so they sent astronauts into space.
Geocentric is that the earth is the center of the universe and heliocentric is the sun is the center of the universe. can it be nothing.
the sky is blue amd the unverse is blackish , YOUR WELCOME :]