Alien star system buzzed the Sun....Aprox 70 000 years ago

[Cidersomerset]

http://static.bbci.co.uk/frameworks/barlesque/2.83.4/desktop/3.5/img/blq-blocks_grey_alpha.png

18 February 2015 Last updated at 13:06

Alien star system buzzed the SunBy Paul Rincon

Science editor, BBC News website


http://news.bbcimg.co.uk/media/images/81084000/jpg/_81084773_81084664.jpg
Scholz's star - artist's impression Scholz's star - shown in this artist's impression - is
currently 20 light-years away. But it once came much closer

An alien star passed through our Solar System just 70,000 years ago, astronomers have
discovered. No other star is known to have approached this close to us.An international
team of researchers says it came five times closer than our current nearest neighbour -
Proxima Centauri.

The object, a red dwarf known as Scholz's star, cruised through the outer reaches of the
Solar System - a region known as the Oort Cloud.

Scholz's star was not alone; it was accompanied on its travels by an object known as a
brown dwarf. These are essentially failed stars that lacked the necessary mass to get
fusion going in their cores.

The findings are published in Astrophysical Journal Letters.

Observations of the dim star's trajectory suggest that 70,000 years ago this cosmic
infiltrator passed within 0.8 light years of the Sun. By comparison, Proxima Centauri is
4.2 light years away.

Close encounter

In the paper, astronomers led by Eric Mamajek at the University of Rochester, New
York, say they are 98% certain that Scholz's star travelled through what is known as
the "outer Oort Cloud" - a region at the edge of the Solar System filled with trillions of
comets a mile or more across.This region is like a spherical shell around the Solar
System and may extend out to as much as 100,000 Astronomical Units, or AU (one AU
is the distance between the Earth and the Sun).

The Oort Cloud is thought to give rise to long-period comets that can swing past the
Sun when their orbits are disturbed.

http://news.bbcimg.co.uk/media/images/81085000/jpg/_81085674_81085672.jpg
Oort Cloud The Oort Cloud in perspective: 1 Astronomical Unit (AU) represents the
distance from the Earth to the Sun

To determine the trajectory of the star, the researchers needed two pieces of
information: the change in distance from the Sun to the star (its radial velocity) and the
star's motion across the sky (its tangential velocity).

Scholz's star currently lies 20 light years away - making it a fairly nearby system. But it
showed very slow tangential motion for a star this close. This indicated that it was
either moving away from us or towards a future close encounter with the Solar System.

The radial velocity measurements confirmed that the binary star system was actually
speeding away from us. By tracing its movements back in time, they found its close
shave with the Sun occurred some 70,000 years ago.

Grand theft Oort-o?

A star passing through the Oort Cloud could potentially play gravitational havoc with the
orbits of comets there, sending them on trajectories into the inner Solar System. But Dr
Mamajek believes the effects of Scholz's star on our cosmic neighbourhood
were "negligible".

"There are trillions of comets in the Oort cloud and likely some of them were perturbed
by this object," he told BBC News.

"But so far it seems unlikely that this star actually triggered a significant 'comet
shower'."

The effect of a passing star on the Oort Cloud is a function of the star's mass, speed and
proximity. The worst case scenario for stirring up comets would be a slow-moving,
massive star that came close to the Sun.

Scholz's star came relatively close, but the binary system (the red dwarf and its brown
dwarf companion) has a low mass and it was speeding by. These factors conspired to
make its effect on the Oort Cloud very small.

While this is the closest flyby detected so far, Dr Mamajek thinks it's not uncommon for
alien stars to buzz the Sun. He says a star probably passes through the Oort Cloud
every 100,000 years, or so.

But he suggests an approach as close - or closer - than that made by Scholz's star is
somewhat rarer. Dr Mamajek said mathematical simulations show such an event occurs
on average about once every nine million years.

"So it is a bit of a strange coincidence that we happen to have caught one that passed
so close within the past 100,000 years or so," he said.

Follow Paul on Twitter.

http://www.bbc.co.uk/news/science-environment-31519875




Sensation! Alien star system buzzed the Sun


R2BydlXEdkA

Published on 18 Feb 2015


An alien star passed through our Solar System just 70,000 years ago, astronomers have announced.

[Tesla_WTC_Solution]

Beautiful :)

[Nick Matkin]

Nibiru? A bit early?

No, probably not.

[Cidersomerset]

Nibiru? A bit early?

No, probably not.

Yeah 70,000 years ago does ring a bell so I'll have a look..LOL

Coincidence...


THE TELEGRAPH....

Humans 'almost became extinct in 70,000 BC'



Stone Age man numbers may have dropped as low as 2,000 about 70,000 years ago

8:27AM BST 25 Apr 2008

The number of early humans may have shrunk to as low as just 2,000 before it began
to rise again in the early Stone Age, an extensive new genetic study suggested yesterday.

Men age faster 'because of Stone Age sex'
Undersea settlement reveals Stone Age skills
Stone Age babies buried with love

The close brush with extinction for human beings came around 70,000 years ago,
according to the report published in the American Journal of Human Genetics.


The new study looked at the mitochondrial DNA - which is passed down through
mothers - of the Khoi and San people in South Africa which appear to have
diverged from other people between 90,000 and 150,000 years ago.

The researchers led by Doron Behar of Rambam Medical Center in Haifa,
Israel and Saharon Rosset of IBM TJ Watson Research Center in Yorktown
Heights, New York, and Tel Aviv University concluded that humans separated
into small populations prior to the stone age, when they came back together
and began to increase in numbers and spread to other areas.


Eastern Africa experienced a series of severe droughts between 135,000 and
90,000 years ago and the researchers said this climatological shift may have
contributed to the population changes, dividing into small, isolated groups
which developed independently of one another.


Meave Leakey, a palaeontologist and Genographic adviser, said: "Who would
have thought that as recently as 70,000 years ago, extremes of climate had
reduced our population to such small numbers that we were on the very
edge of extinction."


Spencer Wells, National Geographic Society explorer in residence, said in a
statement: "This study illustrates the extraordinary power of genetics to
reveal insights into some of the key events in our species' history.

"Tiny bands of early humans, forced apart by harsh environmental conditions,
coming back from the brink to reunite and populate the world. Truly an epic
drama, written in our DNA."

Wells is director of the Genographic Project, launched in 2005 to study
anthropology using genetics.

Previous studies using mitochondrial DNA have traced modern humans
to a single "mitochondrial Eve," who lived in Africa about 200,000 years ago.

The migrations of humans out of Africa to populate the rest of the world
appear to have begun about 60,000 years ago, but little has been known
about humans between Eve and that dispersal.

Today more than 6.6 billion people inhabit the globe, according to the US Census Bureau.

http://www.telegraph.co.uk/news/science/science-news/3340777/Humans-almost-became-extinct-in-70000-BC.html

[Cidersomerset]

Slight variation in predicted date but a giant volcanic eruption almost caused a
extinction event......



WHOA: How Humans Almost Went Extinct 72,000 Years Ago

-kPsxcG-qBw

Published on 25 Oct 2012


Find out how humans almost became extinct 72,000 years ago.

The population of human beings on the planet reached over 7 billion in October of 2011.

But scientists believe that at one point, human beings almost went extinct.

After the eruption of a supervolcano called Toba, the number of people in the world
dwindled severely, and we were almost completely annihilated from existence.

The supervolvano erupted around 70 thousand BC, on the island of Sumatra in
Indonesia, and is the largest volcanic eruption that we know of in geological history.

The effects of the eruption reportedly lowered the global temperature dramatically.

Geneticists have noted the devastation to the human population of this time, and
in 1998 University of Illinois anthropology professor Stanley Ambrose wrote his
theories about Toba and the effects of the eruption being the cause of the lack
of genetic diversity in people.
His work was published in the Journal of Human Evolution.

The supervolcano also devastated wildlife, including deforesting parts of India 3
thousand miles away from the location of Toba.

Science writer Sam Kean, says the dust, ash and vapor that was created by Toba's
eruption "dimmed the sun for six years, disrupted seasonal rains, choked off streams
and scattered whole cubic miles of hot ash across acres and acres of plants."


======================================================
======================================================


Near Extinction of Humans 74,000 Years Ago The Toba SuperEruption

XS8ipDsee0s

Published on 5 May 2013


Near Extinction of Humans 74,000 Years Ago The Toba SuperEruption


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Advanced Stone Blades Discovered from 70,000 Years Ago

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Published on 7 Nov 2012


Researchers in South Africa have discovered multiple sharpened stone blades that date back to roughly 70,000 years ago - and some believe early human

[Nick Matkin]

Yeah 70,000 years ago does ring a bell so I'll have a look..LOL

Coincidence...


Oh yes, that's right. I remember reading about some sort of human genetic 'pinch point' in the not too distant past.

If that is true, and the timings are accurate, I wonder if there's any causation? The BBC piece suggested the encounter was too far way and their masses too small to significantly disturb the Ort cloud to push lots of comets into the inner solar system. Even if it did, space is Very Big and comets and the Earth by comparison are Very Small, so I guess collisions with us are unlikely, although there might have been comets visible much more frequently.

Any serious amateur astronomers like add some informed comment here rather than just read my speculation?

[Gatita]

Interesting stuff. As far as volcanoes, I keep waiting for Ranier to speak up. And of course there's Yellowstone. I would prefer that Yellowstone not erupt, as that would take out my home state in the process. I don't think the SyFy channel can actually do justice to that particular possibility.

Cat

[Cidersomerset]

Oh yes, that's right. I remember reading about some sort of human genetic 'pinch point' in the not too distant past.

If that is true, and the timings are accurate, I wonder if there's any causation? The BBC piece suggested the encounter was too far way and their masses too small to significantly disturb the Ort cloud to push lots of comets into the inner solar system. Even if it did, space is Very Big and comets and the Earth by comparison are Very Small, so I guess collisions with us are unlikely, although there might have been comets visible much more frequently.

Any serious amateur astronomers like add some informed comment here rather than just read my speculation?




Yeah I did not look straight away as the article did say it was to far away , but it is interesting,
and could of it had a seismic effect on that volcano ?

[Cidersomerset]

Interesting stuff. As far as volcanoes, I keep waiting for Ranier to speak up.
And of course there's Yellowstone. I would prefer that Yellowstone not erupt, as that
would take out my home state in the process. I don't think the SyFy channel can
actually do justice to that particular possibility.
Cat

That is the scary one..............

Old Faithful Geyser Erupts, Yellowstone National Park


LWrklFuYnb0

Uploaded on 21 Feb 2007


America's most famous geyser, a segment from "Dances With National Parks", a free
video featuring Mt. Rushmore, Grand Teton, Yellowstone, Bryce Canyon, Zion, the
Grand Canyon, Monument Valley, Arches, and other national parks/monuments in
South Dakota, Wyoming, Utah, and Arizona. With buffalo, moose, beaver, and
many more animals.

===================================================

Heres a scary bedtime story.......and could it be effected if the Sun passes again ?


Yellowstone Caldera : The Biggest Volcanic Eruption Ever Awaits Mankind

-iGJlYgp43s


Published on 12 Jan 2014


Yellowstone National Park lies on top of a magma chamber that is 35-miles wide, waiting to erupt.

The Yellowstone Caldera is the volcanic caldera and supervolcano located in Yellowstone National
Park in the United States, sometimes referred to as the Yellowstone Supervolcano. The caldera is
located in the northwest corner of Wyoming, in which the vast majority of the park is contained.
The major features of the caldera measure about 34 by 45 miles (55 by 72 km). The caldera
formed during the last of three supereruptions over the past 2.1 million years. First came the
Huckleberry Ridge eruption 2.1 million years ago, which created the Island Park Caldera and the
Huckleberry Ridge Tuff. Next came the Mesa Falls eruption 1.3 million years ago, which created
the Henry's Fork Caldera and the Mesa Falls Tuff. Finally came the Lava Creek eruption 640,000
years ago, which created the Yellowstone Caldera and the Lava Creek Tuff.

The last full-scale eruption of the Yellowstone Supervolcano, the Lava Creek eruption which happened
nearly 640,000 years ago, ejected approximately 240 cubic miles (1,000 km3) of rock, dust and
volcanic ash into the sky.

Geologists are closely monitoring the rise and fall of the Yellowstone Plateau, which measures on
average 0.6 inches (1.5 cm) yearly, as an indication of changes in magma chamber pressure.

The upward movement of the Yellowstone caldera floor between 2004 and 2008 — almost 3 inches
(7.6 cm) each year — was more than three times greater than ever observed since such measurements
began in 1923. From mid-summer 2004 through mid-summer 2008, the land surface within the caldera
moved upward as much as 8 inches (20 cm) at the White Lake GPS station. By the end of 2009, the
uplift had slowed significantly and appeared to have stopped. In January 2010, the USGS stated that
"uplift of the Yellowstone Caldera has slowed significantly" and that uplift continues but at a slower pace.
The U.S. Geological Survey, University of Utah and National Park Service scientists with the Yellowstone
Volcano Observatory maintain that they "see no evidence that another such cataclysmic eruption will
occur at Yellowstone in the foreseeable future. Recurrence intervals of these events are neither regular
nor predictable." This conclusion was reiterated in December 2013 in the aftermath of the publication
of a study by University of Utah scientists finding that the "size of the magma body beneath Yellowstone
is significantly larger than had been thought." The Yellowstone Volcano Observatory issued a statement
on its website stating,

" Although fascinating, the new findings do not imply increased geologic hazards at Yellowstone, and
certainly do not increase the chances of a 'supereruption' in the near future. Contrary to some media
reports, Yellowstone is not 'overdue' for a supereruption. "

Other media reports were more hyperbolic in their coverage.

A study published in GSA Today identified three fault zones that future eruptions are most likely to be
centered on. Two of those areas are associated with lava flows aged 174,000--70,000 years, and the
third area is a focus of present-day seismicity.

[Nick Matkin]

Yeah I did not look straight away as the article did say it was to far away , but it is interesting,
and could of it had a seismic effect on that volcano ?

I'm not a geologist, but if it was unable to have a gravitational effect on tiny comets relatively close as it passed, I doubt it could have any gravitational effects in the inner solar system a light year away.

The Moon is extremely close astronomically speaking (1.3 light seconds), but I'm not aware of any correlation between the position of the moon and volcanoes/earthquakes. And god knows, there's been enough research into the predication of earthquakes for planetary gravitational effects to have been recognised by now.