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Why is the sun yellow?

Why is the sun yellow?
Lucy from Cheshire (Age 5-14)
Liam Bennett from Swansea
Bluebell Class from Kent (Age 5-14)

What colour is the sun?
Gabriella Carr from Essex  (age 5-14)


2 Responses

  1. Stars in the universe have a wide range of colours from a nice blues to reds. Ours is yellow.

    From an astronomical perspective, the colour of a star depends on its temperature and composition. Hot stars are bluer and cold stars are redder (the opposite of a bathroom tap !), ours is somewhat in between.
    A diagram can be found here: http://docs.kde.org/kde3/en/kdeedu/kstars/ai-colorandtemp.html

    From a biological point of view, one can argue that we “perceive” the sun yellow because our eyes tell us so. Other animals with different eyes may perceive it completely differently with another colour…the world may look completely alien through the eyes of other species.
    Here are some examples: http://www.colormatters.com/kids/animals.html

  2. All stars give white light. The sun appears to be yellow when viewed from the ground because the Blue Part of the white spectrum of light is filtered out by the oxygen in the atmosphere.
    When we look at the sun from space above our atmosphere it is white and there are no shadows only light and dark.

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