Aphelion is the farthest point in a planet's orbit from the Sun. It is farthest from which celestial body?

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Multiple Choice

Aphelion is the farthest point in a planet's orbit from the Sun. It is farthest from which celestial body?

Aphelion is the point in a planet’s orbit where it is farthest from the Sun, so the body it is farthest from at that moment is the Sun itself. The distance to the Sun reaches a maximum there because the planet is at the greatest separation from the Sun along its elliptical path. The Moon is a satellite of Earth and its distance to Earth changes as the Moon orbits, but aphelion is defined with respect to the Sun, not to Earth’s satellites or to other planets. So, the correct idea is that at aphelion the planet is farthest from the Sun.

Aphelion is the point in a planet’s orbit where it is farthest from the Sun, so the body it is farthest from at that moment is the Sun itself. The distance to the Sun reaches a maximum there because the planet is at the greatest separation from the Sun along its elliptical path. The Moon is a satellite of Earth and its distance to Earth changes as the Moon orbits, but aphelion is defined with respect to the Sun, not to Earth’s satellites or to other planets. So, the correct idea is that at aphelion the planet is farthest from the Sun.

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