Scientific theories and models change over time. In the second century, Ptolemy, who lived in the Egyptian town of Alexandria, produced a mathematical representation based on observation of the known solar system, Ptolemy's model
is called geocentric because the Earth was at the centre with the Sun and planets revolving in a series of circular
orbits around the Earth. Copernicus reconstructed Ptolemy's model 1200 years later, producing the heliocentric model,
with the planets orbiting the Sun. This model differs from models we see today thanks to the discoveries of other
astronomers. How has the heliocentric model been amended?
A
Newer models show the speed of each planet as it spins on its axis in
Space
B)
The planets orbits are not modeled as concentric circles around the Sun
but rather as eltipses
The order of the planets as the orbit the Sun has been modified due to
technological advancements
D)
Astronomers have determined that the outermost planets have different
Shaped orbits than the innermost planets