" Not only the iron on Earth, but also the iron in the entire Solar
System, comes from outer space, since the temperature in the Sun is
inadequate for the formation of iron. The Sun has a surface temperature
of 6,000 degrees Celsius (11,000oF), and a core temperature of approximately
20 million degrees (36 million degrees Fahrenheit). Iron can
only be produced in much larger stars than the Sun, where the temperature
reaches a few hundred million degrees. When the amount of iron
exceeds a certain level in a star, the star can no longer accommodate it,
and it eventually explodes in what is called a "nova" or a "supernova."
These explosions make it possible for iron to be given off into space.40
One scientific source provides the following information on this
subject:
There is also evidence for older supernova events: Enhanced levels of
iron-60 in deep-sea sediments have been interpreted as indications that a
supernova explosion occurred within 90 light-years of the sun about 5
million years ago. Iron-60 is a radioactive isotope of iron, formed in
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85
supernova explosions, which decays with a half life of 1.5 million years.
An enhanced presence of this isotope in a geologic layer indicates the
recent nucleosynthesis of elements nearby in space and their subsequent
transport to the earth (perhaps as part of dust grains).41
All this shows that iron did not form on the Earth, but was carried
from supernovas, and was "sent down," as stated in the verse. It is clear
that this fact could not have been known in the 7th century, when the
Qur'an was revealed. Nevertheless, this fact is related in the Qur'an, the
word of Allah, Who encompasses all things in His infinite knowledge. "

― Harun Yahya , Allah's Miracles in the Qur'an