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Know that the Sun's gravitational strength diminishes with distance, leading to decreased orbital speeds of planets as they move further from the Sun.

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Cambridge IGCSE Combined ScienceSpace physicsSupplement content

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Know that the Sun's gravitational strength diminishes with distance, leading to decreased orbital speeds of planets as they move further from the Sun

This point belongs to Stars and the Universe, especially Stars and the Universe outcomes.
You need to be able to know that the Sun's gravitational strength diminishes with distance, leading to decreased orbital speeds of planets as they move further from the Sun.
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Paper 4 structured question: Stars and the Universe

Paper 4Theory (Extended)2 marks

Description

Gravitational Influence in the Solar System

Planets closer to the Sun experience a stronger gravitational pull, while those further away experience a weaker pull. This affects their orbital speeds.

a
Explain how the distance from the Sun affects the orbital speed of planets.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Related learning objectives

Understand that the Sun is the nearest star to Earth and that astronomical distances are measured in light-years, defined as the distance light travels in one year in a vacuum.
Stars and the Universe outcomes
Calculate the duration it takes for light to cover significant distances, such as between celestial bodies in the Solar System.
Stars and the Universe outcomes
Recognize that the Sun holds the majority of the Solar System's mass, which accounts for the planets' orbits around it.
Stars and the Universe outcomes
Define orbital speed using the formula 2 r π v = T, where r represents the orbit's radius and T is the orbital period, and be able to recall and apply this equation.
Stars and the Universe outcomes
Understand that the gravitational pull of the Sun is the force that keeps objects in orbit around it.
Stars and the Universe outcomes

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