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It means in Latin-Greek, "Closest to the Earth" and refers to a position in an orbit. Apogee means "Farthest from the Earth"Another answerAccording to the Free Dictionary by Farlex, "The point in any orbit nearest to the body being orbited."
Earth's eccentricity Eccentricity is defined as the difference in shape between an ellipse and a perfect circle. In a similar fashion to Earth's obliquity, the more uniform Earth's orbit is (more like a perfect circle), the less difference there is in climate change throughout the year.
From Wikipedia: "The Moon's distance varies each month between approximately 357,000 kilometers (222,000 mi) and 406,000 km (252,000 mi) due to its elliptical orbit around the Earth(distances given are center-to-center).[3][4][5] The size and brightness of an object follows an inverse-square law, which means that a full moon at perigee is 12% larger and 30% brighter than an average full moon. However, because the offset of the moon's orbit versus its phases is only two days, this change in appearance is gradual from month to month and therefore is not usually noticeable to a casual observer."
Yes, the Moon does alter in size to an Earth based observer. This is a real effect caused by the fact that the Moon's orbit round the Earth is not a perfect circle but rather it is an ellipse. The elliptical orbit brings the Moon nearer to the Earth at Perihelion and takes it further away at Aphelion thus at Aphelion it is smaller to the eye than at Perihelion. The Moon also APPEARS to be bigger to the eye when it is close to the horizon this is called the Moon illusion. The link I will place below explains this.
what is the difference between a physical change and a physical property
Angular size. When the Moon is at perigee (closest approach to Earth) the Moon looks about 15% bigger than it does at apogee.
It means in Latin-Greek, "Closest to the Earth" and refers to a position in an orbit. Apogee means "Farthest from the Earth"Another answerAccording to the Free Dictionary by Farlex, "The point in any orbit nearest to the body being orbited."
The word "apogee" is used to describe the farthest point away from Earth, while perigee is the closest point to Earth. This is used to describe the parameters of satellite orbits around the Earth. Both values may change due to gravitational variations.The word apogee is the adaptation of the term apsis which is the term for a farthest distance from some object, with gee (geo) meaning Earth.
Several ways: One could increase velocity, which translates into a higher altitude (apogee), or decrease velocity (lower perigee). Changes in Delta-V. If these changes aren't balanced, one will get an eccentric orbit. Rocket inputs perpendicular to travel will change orbital inclination.
The total energy of a satellite doesn't change. At its closest approach to the planet, it has the most kinetic energy and the least potential, whereas at its furthest retreat from the planet, it has the least kinetic energy and the most potential. But their sum ... the satellite's total mechanical energy ... is always the same. (It may gain heat energy when the sun is shining directly on it, and lose it when it's in the planet's cold shadow, but neither of those changes affects its orbit.)
The motion of the Moon would change from an elliptical orbit to a straight line.
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Rate of change AND elliptical orbital paths; nee Newton & Copernicus.
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There is no 'periodic' change in the earths orbit. The orbit is elliptical and over time (a great many years) becomes less so.
Not much would change. Note that the seasons are NOT related to changes in the distance from the Sun.
Variance from mean distance denotes an acceleration as kinetic and potential energies are interchanged.