Exam code: 0653
What is a light-year?
the distance travelled by light in a vacuum in 1 year
the distance travelled by light in a vacuum in 100 000 years
the time taken for light to travel across the Universe
the time taken for light to travel across the Milky Way galaxy
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Which sequence is part of the life cycle of a small star (about the same size as the Sun)?
red giant → planetary nebula + white dwarf
red giant → supernova → black hole
red supergiant → planetary nebula + black hole
red supergiant → supernova → white dwarf
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State the name of the galaxy that contains the Sun.
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Billions of years in the future, the Sun will enter the next stage of its life cycle.
(i) State the next stage in the life cycle of the Sun.
[1]
(ii) Explain why the Sun will not become a black hole at the end of its life cycle.
[1]
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