One question that is asked to the astronomers the most is- when the world is going to end. A recent study might have the answer to the question. According to a study published in the Astronomy and Astrophysics journal, our sun will expand as much as 100 times of its current size, burning out the whole of the earth, thereby completely wiping off life on the planet.
It is very obvious that the researchers are talking about very distant future, counting several billions of years. The team from Leuven, Belgium made use of some of the most advanced radio telescopes to study the evolution of stars. They found out that, though, the sun will grow 100 times in size, but it will consume only the first two planets- Mercury and Venus. The immense heat and radiation from the enlarged sun will result in the end of life on the earth.
“Five billion years from now, the sun will have grown into a red giant star, more than a hundred times larger than its current size. It will also experience an intense mass loss through a very strong stellar wind. The end product of its evolution, seven billion years from now, will be a tiny white dwarf star. This will be about the size of the Earth, but much heavier: one teaspoon of white dwarf material weighs about five tons,” wrote Professor Leen Decin of the KU Leuven Institute of Astronomy.
The researchers made use of ALMA telescope that uses 66 radio antennas to create a large virtual telescope having a diameter of 10 miles. L2 Puppis, the star that the team researched on, is situated 208 light-years away from the earth and is similar to the sun in many ways. The L2 Puppis was a perfect twin of the sun about 5 billion years ago, but it has lost one-third of its mass after its expansion. Due to the expansion, all the planets revolving around the star were lost, and only one was left, being located about 186 million miles away from L2 Puppis.
This could probably happen to the earth, it will take at least 5 billion years. There are more chances of humans getting extinct by then of so technologically advanced that they can move to another planet before any such thing happens.