Instinctively, the Sphere Observer was convinced that the Earth either is standing still or, in case of an accelerated motion of the Sun, is moving uniformly.

Note 9 Since Einstein, this feeling of the Sphere observers is considered logical. Motion is relative and dependent on the chosen coordinate system. If an object and the selected coordinate system are the same or if no coordinate system has been selected, the object is motionless or moves uniformly with respect to other coordinate systems.
By the ‘feeling’ of the Sphere Observer, the internal sense is meant, a general sensory consciousness, and not tactile sense.

All the more since this feeling is collective, the Sphere Observer has assumed that the motion of the (uniformly rotating) Earth must be a hybrid one; thus both uniform and accelerated. In that case, its accelerated translation can be attributed to the accelerated motion of the Sun, leaving a uniform translation for the Earth.

Note 10 The hybridness of the Earth's motion was already known before Einstein. However, it could not be explained by Newton Mechanics because the gravity of the Sun is far from strong enough to exert a force on Earth. This phenomenon was therefore considered a mistake of nature, a so-called anomaly. Since Einstein this phenomenon is understood: the Earth moves uniformly in a geodesic (= spacetime shell or circle) of the Sun.

If the motion of the sun indeed is an accelerated one, as it is suggested by the wobbling solar arc, the suns drags the Earth along its journey through space. The hybrid motion of the (uniformly rotating) Earth can then only be explained by assuming that it circulates uniformly around the Sun.

To clarify this, one can imagine a scenario as shown in the adjoining image.

What you see here is:

• the path of motion of the sun, where the years follow each other. S '- Sun is the period of exactly one (earth) year (a single winding of the helix)

• the 3D helix, on which the seasons follow each other. This is the hybrid motion of the uniformly rotating Earth.

The displayed image is consistent with current data.

Continue to: 2.5.2. Sensitivity-hypothesis