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Learning objective

Understand that the Milky Way is one of billions of galaxies in the Universe, with a diameter of about 100,000 light-years.

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Combined ScienceSpace physicsCore content

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Quick explanation

Understand that the Milky Way is one of billions of galaxies in the Universe, with a diameter of about 100,000 light-years

  • This point belongs to Stars and the Universe, especially Stars and the Universe outcomes.
  • You need to be able to understand that the Milky Way is one of billions of galaxies in the Universe, with a diameter of about 100,000 light-years.
  • The key ideas to know are State and Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

StateDescribe

Why it matters

This objective helps connect Stars and the Universe outcomes to exam-style questions, flashcards, and revision notes for Stars and the Universe.

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Paper 3 structured question: Stars and the Universe

Paper 3Theory (Core)2 marks

Description

Characteristics of the Milky Way

The Milky Way has a diameter of about 100,000 light-years and is one of billions of galaxies in the universe.

  1. a

    Describe the size of the Milky Way and its significance in the universe.

    Aim for approximately 2 distinct marking points.

    [2]
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