Astronomers solve a mystery surrounding a too-large star

WOH G64 ESO

The enormous star WOH G64 just got a serious weight reduction. The star is almost 2,000 times as large as our Sun, and it hangs out in the Large Magellanic Cloud, some 163,000 light years away from us. Until recently, scientists thought the mass of WOH G64 was 40 times that of the Sun. But that figure didn't make sense, since the star seemed to be way too cold for something packing that much matter.

Now, using the cleverly named Very Large Telescope, astronomers have figured out that WOH G64 is half as bright as they thought, and significantly less massive. The star's shape has also garnered interest: It is surrounded by a dense, donut-shaped collection of gas and dust. The scientists now guess that the star's initial mass was 25 times that of the Sun, and that anywhere from three to 9 solar masses have been siphoned off into this waistband of dust and gas, otherwise known as a torus.

"Everything is huge about this system. The star itself is so big that it would fill almost all the space between the Sun and the orbit of Saturn," says astronomer Keiichi Ohnaka. "And the torus that surrounds it is perhaps a light-year across!"

Via ESO

3 Comments

So I am guessing this is a site of interest for the future as to see the expansion of the torus and possible element grouping forming planets? Size is really irrelevant in this kind of perception as which is the same for, what is actually cold.

If that colour image is right then its a hydrogen nebula, with what appears other common matter. Also a Large system like this only 163kly away definalty poses possible habitat for our decendants. Note with a new excitement in plasma propulsion and technology this looks to be something great.

You fall somewhere in the Balanced Frequency of Nature. Someone Along the Infinite Spectrum of Life.

That's completely ridiculous to say that a large system 163kly away is a valid choice for colonization, even in the distant future. Not only is there closer, and more applicable systems, this is a dying star! Being that the image we receive is 163,000 years old, the star may very well be dead already. And when it DOES die, if it hasn't already, it will burst into supernova, and then form a black hole. How could this be a system for our descendants? This star has depleted its hydrogen core and is rapidly fusing any elements available to it, and once it starts to try and have an iron based core, poof. Goodbye everything even remotely close.

Moving on, its incredibly cold for a star, and not exceptionally bright either. Its not even a main sequence star. Its huge, yeah, but even our sun a mere class M, is more massive. It'd be nearly impossible to sustain life in with this environment. This star is constantly ejected clouds of dust and gas into the nebula around it, so even if there was a planet near it, it would be a gas giant, pulling in all that excess material to develop an excessively dense atmosphere.

Oh and as for "excitement" about plasma propulsion, while they can rocket along for much longer than conventional chemical rockets, they have much less thrust. So it's not like we've developed a warp engine or anything, we can go farther than before but we still do not have interstellar capabilities, especially not someplace 163kly away.

For example, the only celestial body we've sent humankind to is the moon. The moon is only 384,403km away, or 1.2 lightseconds. One lightyear is 9,460,730,472,580.8km. So if you pull out your calculator that's just under 2.5 million travels to our moon. So 163,000 lightyears is 1,542,099,067,030,670,400km, or 4,011,672,820,010.9 trips to the moon. So unless we develop the technology to create and stabilize wormholes, its not going to happen for millenia.

One trip to the moon is 1.2 lightseconds. There are over 31.5 million seconds in a year. So I ask again, how is this system even a thought for colonization? And even setting aside the just ridiculous distance to get there, considering we're still having problems deciding how to send someone to mars safely, this place is a wasteland. Its incredibly interesting and awe-inspiring how huge it is, but just because its big does not mean we should pack some bags for fresh real estate. Mars has for more capabilities to sustain life than that.

Mars may be more desirable at this point in our solar system's existence but what happens when it's time to completely vacate the Earth? Chances are the reason humankind would need to abandon Earth is due to some sort of impending impact from a large celestial body. If this was the case, I don't think that Mars would be the best choice for a new home. The amount of debris generated from a cataclysmic impact on the Earth would no doubt cause problems for anyone living on Mars. I don't have the answer for the question of where humans would go, but I'm pretty sure that Mars wouldn't be the best choice. Hopefully humans won't have to abandon Earth for a few thousand years at the least and again, hopefully our technology will have improved enough to allow us to travel to another star system in a reasonable amount of time. Even if some massive ship needed to be constructed in order to allow humans to live in transit for a couple of centuries, it would be better than extinction.



June 2013: American Energy Independence

Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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