A solar system, similar but much older than ours

L2 Puppis, a solar system about 208 light-years away from Earth. An international team of astronomers is using the ALMA radio telescope to study this solar system.

The L2 Puppis is about 10 billion years old, about twice the age of our Sun. Five billion years ago, the star was an almost perfect twin of our Sun as it is today, with the same mass. One third of this mass was lost during the evolution of the star.

Professor Leen Decin of KY Leuven Institute of Astronomy said that our Sun will become a giant red star and will be 100 times bigger than its current size, in a few billion years. This will probably lead to the destruction of closer planets like Mercury and Venus, though what will happen to the Earth is not yet known.

After that the sun will also experience an intense mass loss, which will reduce it to the size of the Earth but will be much heavier. This will probably happen about 7 billion years from now. Read the full article here!

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