Astronomers Discover Planet-Eating Star

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PostWed Aug 22, 2012 6:57 pm » by *WillEase*


Published on Aug 22, 2012 by NewsyScience

A team of five scientists discover a planet-eating star with the Hobby-Eberly Telescope. Researchers believe Earth could have the same fate.


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(The description of the planet and the brown dwarf it orbits sounds like Nibiru?)

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PostWed Aug 22, 2012 8:18 pm » by Shaggietrip


Very cool topic. Although nothing new to the galaxy. The new is their Direct evidence. I assume.

It is a great item to research. Amazing just to think of what energy or mass things or happenings like this would take. Very hard to comprehend. Would be quite a sight if you could actually witness it happening from start to finish.




It's no fairy tale: Four hungry white dwarfs have been found "snacking" on the shattered remains of Earthlike planets, according to a new study.

Giant Planets Swallowed Whole?

The new planets orbit a subdwarf B star called KIC 05807616, which lies about 4,000 light-years away in the direction of the constellation Cygnus.

Subdwarf B stars are hot, blue stars that fall between red giants and white dwarfs—the final stage in the life cycles of stars like our sun.

When a sunlike star has depleted most of its fuel, it will swell up to become a red giant many hundreds of times its original size.

As the red giant star balloons, any planets closest to the star are completely vaporized in the inferno.

Astronomers think our sun will enter this phase in about five billion years and engulf the solar system's inner planets: Mercury, Venus, Earth, and Mars.


Full read and source: http://news.nationalgeographic.com/news/2011/12/111221-earth-planets-deep-fried-star-evolution-nasa-space-science/




For the first time, astronomers have seen evidence of an aging star consuming its own planet. Such events are not uncommon as aging stars expand in size, engulfing nearby planets. But the events happen relatively quickly on a cosmological time scale and it is considered unlikely for one to be observed directly.

The star in question is known as a red giant. Such stars begin with a mass about the same as that of the Earth's sun. As they age, the hydrogen fusion reactions in their core become less efficient and most of the fusion is transferred to the outer shell of gases. The increased fusion makes the shell hotter and as much as 1,000 times brighter than normal, causing the diameter of the star to expand continually until its radius reaches a size equivalent to the Earth's distance from the sun.


Full Read and Source: http://www.latimes.com/news/science/sciencenow/la-sci-sn-star-eats-planet-20120821,0,1056613.story?track=rss




Now for some older news. Not sure if all here know of how black holes are created. Wich swallow thing also. Here is a snipet.

How Do Black Holes Form?

Scientists think the smallest black holes formed when the universe began.

Stellar black holes are made when the center of a very big star falls in upon itself, or collapses. When this happens, it causes a supernova. A supernova is an exploding star that blasts part of the star into space.

Scientists think supermassive black holes were made at the same time as the galaxy they are in.





Full read and Source3: http://www.nasa.gov/audience/forstudents/k-4/stories/what-is-a-black-hole-k4.html






Now here comes why I am a bit confused on why this is new. Direct evidence? What new data is out there that shows better evidence? This is what bugs me a bit. It is now new? Why not say confirmed?

I know there are some out there that may be able to put me straight.

Stars are known to eat planets. Other galaxies eat others. Like our about to eat another. As I am sure the Milky Way will be absorbed also by Andromeda.


In recent years, a great deal of focus has been put on understanding merger events in the evolution of galaxies. Our own galaxy (the Milky Way) has a tiny satellite galaxy (the Sagittarius Dwarf Elliptical Galaxy) which is currently gradually being ripped up and "eaten" by the Milky Way. It is thought these kinds of events may be quite common in the evolution of large galaxies. The Sagittarius dwarf galaxy is orbiting our galaxy at almost a right angle to the disk. It is currently passing through the disk; stars are being stripped off of it with each pass and joining the halo of our galaxy. There are other examples of these minor accretion events, and it is likely a continual process for many galaxies. Such mergers provide "new" gas, stars, and dark matter to galaxies. Evidence for this process is often observable as warps or streams coming out of galaxies.


Source: http://en.wikipedia.org/wiki/Galaxy_formation_and_evolution





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Stellar Nursery

Stars form in dense clouds of gas and dust such as this one, called the Rho Ophiuchi dark cloud. These clouds are so dense that visible light produced by the stars is blocked by the dust. Astronomers use infrared telescopes in space to detect emissions from new stars.

A star begins its life as a large and comparatively cool mass of gas. The contraction of this gas and the subsequent rise of temperature continue until the interior temperature of the star reaches a value of about 1,000,000° C (about 1,800,000° F).

At this point a nuclear reaction takes place in which the nuclei of hydrogen atoms combine with heavy hydrogen deuterons (nuclei of so-called heavy hydrogen atoms) to form the nucleus of the inert gas helium. The latter reaction liberates large amounts of nuclear energy, and the further contraction of the star probably is halted.

When the release of energy from the deuteron-hydrogen nucleus reaction ends, contraction begins anew, and the temperature of the star increases again until it reaches a point at which a nuclear reaction can occur between hydrogen and lithium and other light metals present in the body of the star.

Again energy is released and contraction stops.

When the lithium and other light materials are consumed, contraction resumes, and the star enters the final stage of development in which hydrogen is transformed into helium at extremely high temperatures through the catalytic action of carbon and nitrogen.


Source and full read: http://www.cartage.org.lb/en/themes/sciences/astronomy/thestars/evolutionstars/evolutionstars.html


Sarastarlight


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Great post. The evolution of a star and galaxies may be a cool video. :think:



Thanks again Will666 for the post it got me thinking.




:cheers:
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Star watchers,Sun,Moon or just space in interest. https://www.darkskywatcher.com/dsw74.html

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PostThu Aug 23, 2012 6:25 am » by Aragajag


It makes you wonder with all the light and love stuff then look around at the physical universe. Everything is dog eat dog, something survives by consuming something else whether animal or stella.
So is the way we have been taught morals etc really the wrong thing, maybe to be really true and free yourself have no mercy consuming anything that will make you bigger and stronger or just be in your way. To crush your enemies and hear the lamentation of their women.
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