The original cloud from which the Sun and planets formed had a composition rich in hydrogen and helium.

Name: The original cloud from which the Sun and planets formed had a composition rich in hydrogen and helium.
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The original cloud that formed the Sun and planets, known as the solar nebula, had a composition rich in hydrogen and helium, with smaller amounts of heavier elements. This is because hydrogen and helium were the most abundant elements in the early universe, formed in the Big Bang.

The Original Cloud from Which the Sun and Planets Formed