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.
The Earth will become Mars-like. I’m sure of it.
Very nicely put! I liked that you crafted the context so well, better than I would have—so I learned something there. I’m just surprised it wasn’t until the 25th reply that someone pointed out the obvious.
Some liberal, Marxist kook living then will blame it on
coal mining and use of "fossil" fuels.
Because focusing exclusively on the near future is how people forget about the long future. If we don’t focus on the long future solving current problems is just wasted effort. Life is won by those who play the long game.
A more relevant question is, “Will Democrats still exist in five years?”
It’s not all knowing. It’s simple logic.
The end is nigh... Run for your lives.
Yes. We could solve every other problem that faces humanity, but if we don’t get off the rock before it become uninhabitable (which is inevitable, ice ages, polar reversals, rocks from the sky, or eventually the sun turns off) then it was all wasted effort.
ZERO F_CKS GIVEN
One can take a moment to give something like the ultimate fate of the planet a thought without worrying about it. Or not caring about anything else going on.
It'll be here before you know it.
Got more important things to worry about...sheesh
Would Harambe care?
Sorry, didn't mean to worry you.
Everything that I've read is that the sun is going to die out. I've even stocked up on booze and thermal underwear.
The only way to end this nonsense is a no holds barred cage match............
You FReepers screaming “who cares”....apparently you cared enough to click on the damn thread.
And it’s really important that human beings exist forever?
Making the most of our lives while we are living them is
pointless unless the species continues on infinitum?
Im setting an iCal event reminder.
It will last as long as the Good Lord lets it.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.