Question

Day - night and occurence of seasons are result of Earth's movements . Explain these movements in 3 -4 lines or more .


only answer .​

Answer 1

Answer:

The Earth's Three Motions. The Earth turns (rotation around the polar axis), goes along on its orbit (revolution around the Sun), swings smoothly as un unbalanced spinning top (equinoctial precession).

Explanation:

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Answer 2

Answer:

The gravitational pull of the Sun and Moon on Earth's equatorial bulge causes Earth's rotational axis to gyrate around the vertical, tracing a cone in space over a period of 26,000 years. The pole star to which the axis points today is Polaris. Thirteen thousand years ago Earth's axis pointed to Vega, in the constellation Lyra, as it will again 13,000 years from now. Precession was the third-discovered motion of the Earth, after the far more easily observed daily rotation and annual revolution.An observer on Mercury who has watched the sun rise once (below, 2) is pulled back into darkness (6) when the planet is at perihelion, its closest approach to the Sun. The Sun's gravitational pull causes Mercury's orbital speed to exceed its slow rate of axial rotation. Once the planet is past perihelion, the Sun pulls on Mercury from behind, slowing its orbital speed. The observer travels back across the day­night line to see the sun rise again

Because of its 59-Earth-day rotation and 88-day orbital period, Mercury's days last two years (above). If an observer (flag) sees the Sun come up when Mercury is at aphelion, farthest from the Sun (1), noon occurs at perihelion (3). Sunset (5), at the next aphelion, ends one year and begins the next (6). Midnight occurs at the next perihelion (>8). Dawn (10) begins year three.