What is a light-minute?
the time for light to travel 1 million km1\text{ million km}1 million km in space
the time for light to travel from the Sun to the Earth
the distance travelled in space by light in one minute
the distance travelled by light from the Earth to the Moon
104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.