Astronomers have identified a star almost identical to the Sun, except that it is 4 billion years older.
Astronomers have identified a star almost identical to the Sun, except that it is 4 billion years older.
They have dated this old age by the amount of lithium detected in the star.
Astronomers have identified a star almost identical to the Sun, except that it is 4 billion years older.
They have dated this old age by the amount of lithium detected in the star.



