Paragraph 2
The Sun is still
. It is just 4.6 billion years old. This means it is only around one
into its
. A professor explained that: "When a star dies, it ejects a mass of gas and
into space....This reveals the star's core. By this
in the star's life, it is running out of fuel." He said it then turns off and dies. The
was happy that modern
can calculate the age of
and what will happen to them. He said we can work out what stars there are in
galaxies. He said: "We have
found out what the Sun will do when it dies".
