Planets longitude changes continuously in respect of the fixed stars (the dome). They have their own motion on the celestial sphere. Currently a double reason is given for this particular motion: first planets move around the sun on an almost circular trajectory (according to Kepler laws) and, second , the Earth moves around the sun and thus the visual direction Earth-planet that projects the planet on the celestial sphere is continually changing.
What should be the different consequences when considering a fixed and central Earth?
… where land’s semicircle lies, fenced by the azur vault.
Varro’s quotation from the poet Nevio
When talking of a temple people generally imagine a building for the worship of God, but the original meaning of the term is another.
From earliest times temples have been built as scale models of the universe. The first known mention of the latin word templum is by Varro (116-27 B.C.) for whom it designated a sort of cosmic observatory.
This article is under revision.
Consider the picture aside. It represents the celestial sphere. The ecliptic is the maximum circle inclined of about 23°27’ on the celestial equator . It is the projection of the trajectory of the sun (they say the Earth) on the celestial sphere (we say the dome or the firmament).
and are the points where the ecliptic intersects the equator otherwise known as the equinox points.
The angle of 23°27’ is the obliquity of the ecliptic and it is not always constant but it registers in the course of the year some small variation.
In the antiquity astronomers had already understood that the trajectory of the sun in the heavens is inclined.
Surfing the net you often happen to notice images of smoke columns getting out from volcanos and raising up to great altitudes. This is a phenomenon by many considered to be a clear evidence the Earth is not spinning. Many people could get the same impression in relation with high waterfalls: the fact that water falls on a straight line and doesn’t bend would be a clear consequence of the Earth being stationary and not spinning around its axis.
Powerful images, aren’t they? But could these phenomena show a clear evidences that the Earth is not spinning? Let’s make some consideration. Read more
What is Coriolis acceleration? This is a phisical phenomenon happening to an object moving in a rectilinear way on a rotating surface.
Look at the image: in the first picture the ball is moving over a rectilinear line on a stationary platform. The ball doesn’t resent of any lateral acceleration. When the platform starts rotating, the ball starts bending its trajectory and the result will prove to be a non rectilinear movement. This side acceleration is kown as Coriolis acceleration. It is an outstanding phenomenon that can be useful to prove that the Earth is not moving. Read more