in Earth Day rotation should be explained
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Answer:
Earth's rotation is the rotation of Planet Earth around its own axis. ... Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes, and 4 seconds with respect to other, distant, stars (see below). Earth's rotation is slowing slightly with time; thus, a day was shorter in the past.
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Answer:
January 8 is Earth’s Rotation Day. The day commemorates when French Physicist, Leon Foucault, demonstrated the Earth rotates on its axis in 1851.
Dark sky at night with star trails.
The Earth's axis is tilted about 23.5° with respect to its orbital plane around the Sun.
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To prove his theory, Foucault suspended a lead-filled brass sphere, now called the Foucault Pendulum from the top of the Pantheon in Paris.
He showed that the plane of the swing of the pendulum rotated relative to the Earth’s rotation. You can now see the Foucault Pendulum demonstrating the rotation of the Earth in science museums around the world.