What proofs are there that the Earth is rotating and that it is revolving around the sun?
foucault pendulum and parallax
foucault pendulum and retrograde motion
albedo and parallax
albedo and precession
- Foucault Pendulum: A Foucault pendulum demonstrates the rotation of the Earth by the fact that its plane of oscillation rotates slowly over time. The direction of the rotation is clockwise in the northern hemisphere and counterclockwise in the southern hemisphere. This phenomenon is a result of the Coriolis effect, which is caused by the rotation of the Earth.
- Parallax: Parallax is the apparent shift in position of an object when viewed from different points. The parallax of stars in the sky changes as the Earth revolves around the sun, providing evidence of the Earth's orbit.
- Retrograde Motion: Retrograde motion is the apparent backward motion of planets in the night sky. This phenomenon can be explained by the fact that Earth is orbiting the sun faster than outer planets, causing them to appear to move backwards briefly.
- Albedo: Albedo is the measure of the reflectivity of a surface. The changing albedo of the Earth throughout the year is a result of its revolution around the sun, causing different regions to receive varying amounts of sunlight.
- Precession: Precession is the gradual change in the orientation of the Earth's axis of rotation. This phenomenon is caused by the gravitational pull of the sun and moon, and it provides evidence that the Earth is revolving around the sun.