Posted on 12/26/2016 3:17:35 PM PST by ETL
What will happen to Earth when, in a few billion years' time, the Sun is a hundred times bigger than it is today? Using the most powerful radio telescope in the world, an international team of astronomers has set out to look for answers in the star L2 Puppis. Five billion years ago, this star was very similar to the Sun as it is today.
"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," says Professor Leen Decin from the KU Leuven Institute of Astronomy. "It will also experience an intense mass loss through a very strong stellar wind. The end product of its evolution, 7 billion years from now, will be a tiny white dwarf star. This will be about the size of the Earth, but much heavier: one tea spoon of white dwarf material weighs about 5 tons."
This metamorphosis will have a dramatic impact on the planets of our Solar System. Mercury and Venus, for instance, will be engulfed in the giant star and destroyed.
"But the fate of the Earth is still uncertain," continues Decin. "We already know that our Sun will be bigger and brighter, so that it will probably destroy any form of life on our planet. But will the Earth's rocky core survive the red giant phase and continue orbiting the white dwarf?"
To answer this question, an international team of astronomers observed the evolved star L2 Puppis. This star is 208 light years away from Earth -- which, in astronomy terms, means nearby. The researchers used the ALMA radio telescope, which consists of 66 individual radio antennas that together form a giant virtual telescope with a 16-kilometre diameter.
"We discovered that L2 Puppis is about 10 billion years old," says Ward Homan from the KU Leuven Institute of Astronomy. "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. The same will happen with our Sun in the very distant future."
300 million kilometres from L2 Puppis -- or twice the distance between the Sun and the Earth -- the researchers detected an object orbiting the giant star. In all likelihood, this is a planet that offers a unique preview of our Earth five billion years from now.
A deeper understanding of the interactions between L2 Puppis and its planet will yield valuable information on the final evolution of the Sun and its impact on the planets in our Solar System. Whether the Earth will eventually survive the Sun or be destroyed is still uncertain. L2 Puppis may be the key to answering this question.
‘World to end: Women & minorities hardest hit’
My answer is in Ecclesiastes 1:4.
Seriously? Who cares? What are you smoking?
as long as all liberals are dead first, I’m Ok with it..
Eventually, the Sun will explode. When it does, Earth will cease to exist. This will be the ultimate proof of global warming.
On average, species live ten million years and then go extinct. The amount of time there has been complex life on Earth has been relatively brief. In that time it has changed enormously. In another five billion years you probably won’t even find our footprints on the moon.
Bush’s fault
The important question is, will dead democrats still be voting in 5 billion years?
It’s the most important quest that exists. Eventually this planet WILL be uninhabitable, and if we haven’t gotten sustainable humanity somewhere else EVERYTHING we ever accomplished ceases to exist and we will actually have accomplished nothing.
Blather.
“Racist white dwarf star to kill all black people!!!”
Who cares...
Ping me with a day or two advance warning.
The boss told him to “write something, we have a deadline!”...so he did.
The earth will self destruct due to climate change in less than 20 years.
Not too serious. Just thought it would invoke some interesting, if not humorous, discussions.
Who asked you?
That’s the ultimate goal of the left. They despise humanity and wish it destroyed. Overcoming their evil and reaching to the stars must be our goal.
Yep...who cares...well maybe Hillary will be running for the billionth time..she may care
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