Tag: permanently (page 1 of 3)

The Portal 2019-08-28 14:54:00

Security breach at 310, project permanently aborted

View Article Here Read More

Antidepressants May be Worsening Depression, Not Treating It

Julie Fidler, Natural SocietyCould it all be based on a myth?For years we’ve been told that depression is caused by low serotonin levels in the brain.Now, a leading professor of psychiatry is warning that belief is little more than a dangerous miscommunication, saying the marketing of selective serotonin reuptake inhibitor (SSRI) drugs is “based on a myth.”SSRI use began to skyrocket in the early 1990’s. The drugs were seen as a safer alternative to [...]

View Article Here Read More

Spring Cleaning Tips for Body, Mind and Spirit

Excerpt from huffingtonpost.comAn extended winter throughout much of the U.S. and Canada really cut into the enjoyment of the spring season this year for many. One of our coaching students sent me photos of over a foot of snow this past May weekend...

View Article Here Read More

Desperately Seeking ET: Fermi’s Paradox Turns 65 ~ Part 2

Excerpt from huffingtonpost.comIntroductionWhy is it so hard to find ET? After 50 years of searching, the SETI project has so far found nothing. In the latest development, on April 14, 2015 Penn State researchers announced that after searching through...

View Article Here Read More

Shortest Total Lunar Eclipse of the Century Visible Early Saturday


 


Excerpt from space.com 
By Calia Cofield 

Don't forget to look skyward in the early hours of Saturday morning (April 4), to catch a glimpse of the shortest total lunar eclipse of the century.

The moon will be completely swallowed by Earth's shadow for just 4 minutes and 43 seconds on Saturday morning, according to NASA officials. During that time, the moon may change from its normal grayish hue to a deep, blood red. The total eclipse begins at 6:16 a.m. EDT (1016 GMT). You can watch a live webcast of the eclipse on the Slooh Observatory website, Slooh.com, or here at Space.com courtesy of Slooh, starting at 6 a.m. EDT (1000 GMT).
That color change can make for a dramatic display, especially for humans in the distant past, NASA officials said. 


"For early humans, [a lunar eclipse] was a time when they were concerned that life might end, because the moon became blood red and the light that the moon provided at night might have been taken away permanently," Mitzi Adams, an astronomer at NASA's Marshall Space Flight Center in Huntsville, Alabama, said during a news conference today (April 3). "But fortunately, [the light] always returned." 

The April 4 eclipse is the third in a series of four total lunar eclipses — known as a lunar tetrad — visible in the United States. Each of the eclipses is separated by about 6 months. The final installment of this four-eclipse series will occur on Sept. 28. Saturday's lunar eclipse follows closely behind the total solar eclipse that took place on March 20.

Earth's shadow has an outer ring, called the penumbra, and an inner core, called the umbra. Where the moon passes into the penumbra, it appears dark, as if a bite had been taken out of it. When the moon passes though the umbra, it turns a deep, red color.

A total lunar eclipse occurs when the moon is totally submerged in the umbra. On Saturday, the moon will begin to enter the umbra at about 6:16 a.m. EDT (1016 GMT) but will not be completely covered by the shadow until about 7:57 EDT (1157 GMT), after the moon has set in most locations east of the Mississippi River.

While the total eclipse will last less than five minutes, the moon will be partially submerged in the umbra for about one hour and 40 minutes. The dark shadow of the penumbra will first be visible on the moon's surface starting at about 5:35 a.m. EDT (0935 GMT), according to Sky and Telescope magazine.

Viewers west of the Mississippi River will be able to see the total lunar eclipse, starting at about 4:57 a.m. PDT (1157 GMT). Skywatchers in Hawaii and western Alaska will be able to watch the entire eclipse, from the moon's entrance to its exit from the penumbra.

Viewing Guide for Total Lunar Eclipse, April 4, 2015
This world maps shows the regions where the April 4 total lunar eclipse will be visible. The best viewing locations are in the Pacific Ocean.

This weekend's eclipse is extremely short because the moon is only passing through the outskirts of the umbra. (The shortest total lunar eclipse in recorded history, according to Adams, was in 1529 and lasted only 1 minute and 41 seconds).

The eclipse will not be visible in Europe or most of Africa. The partial eclipse will be visible in all except the easternmost parts of South America. The best viewing locations for the total eclipse will be in the Pacific region, including eastern Australia, New Zealand and other parts of Oceania.

View Article Here Read More

Why the U.S. Gave Up on the Moon

Moon nearside



Excerpt from spacenews.com


Recently, several space advocacy groups joined forces to form the Alliance for Space Development. Their published objectives include a mention of obvious near-term goals such as supporting the commercial crew program, transitioning from use of the International Space Station to future private space stations and finding ways to reduce the cost of access to space.  What is notably missing from these objectives and those of many other space agencies, companies and advocacy groups is any mention of building a permanent settlement on the moon. It’s as if the lunar surface has become our crazy uncle that we all acknowledge exists but we’d prefer not to mention (or visit).  What made the next logical step in mankind’s progression beyond the bounds of Earth such a taboo subject?  If, as the Alliance for Space Development suggests, our nation wishes to move toward a path of permanent space settlements, the most logical step is our own planet’s satellite.

Lunar base conception
A 2006 NASA conception of a lunar base. Credit: NASA


A base on the lunar surface is a better place to study space settlement than a space station or Mars for many reasons. Unlike a space station, the base does not have to contend with aerodynamic drag, attitude control issues or contamination and impingement from its own thrusters. Unlike a space station, which exists in a total vacuum and resource void, a lunar base has access to at least some surface resources in the forms of minerals, albeit fewer than might be available on Mars.  Many people naturally want to go directly to Mars as our next step. Even SpaceX has publicly stated this as its ultimate goal, with SpaceX President Gwynne Shotwell noting that “we’re not moon people.” However, Mars makes sense only if we think the technology is ready to safely support humans on another surface for long periods of time. Furthermore, budget restrictions make an ambitious goal like going immediately to Mars an unlikely prospect. Why are we afraid to take the seemingly necessary baby steps of developing the technology for a long-term base on a surface that can be reached in mere days instead of months?  The tendency to want to skip a lunar settlement is not a new phenomenon. Even before the first landing on the moon, U.S. and NASA political leadership was contemplating the future of manned space, and few of the visions involved a lunar base. The early space program was driven by Cold War competition with Moscow, and the kinds of ideas that circulated at the time involved milestones that seemed novel such as reusable spaceplanes, nuclear-powered rockets, space stations and missions to Mars. 

When the United States was on the verge of a series of landings on the moon, building a permanent base just didn’t seem like much of a new giant leap. NASA's ConstellationNASA’s Constellation program, featuring the Orion manned capsule set atop the Ares 1 launch vehicle, was meant to send astronauts back to the moon. Credit: NASA  The idea of a lunar landing mission was not reintroduced seriously until the George W. Bush administration and the introduction of the Constellation program. This program came at a complex time for NASA: The space shuttle was recovering from the Columbia disaster, the space station was in the midst of construction and the United States found itself with large budget deficits. However, despite its budgetary and schedule problems, which are common in any serious aerospace development project from space programs to jumbo-jet development, it provided NASA with a vision and a goal that were reasonable and sensible as next steps toward a long-term future of exploration beyond Earth. 

Constellation was nevertheless canceled, and we have since returned to a most uncommon sense.  The decision to avoid any sort of lunar activity in current space policy may have been biased by the Obama administration’s desire to move as far away as possible from the policies of the previous administration. 

Regardless of the cause, discussion of returning to the moon is no longer on the table.  Without the moon, the only feasible mission that NASA could come up with that is within reach given the current technology and budget is the Asteroid Redirect Mission.  
Even planetary scientists have spoken out against the mission, finding that it will provide little scientific value. It will also provide limited engineering and technology value, if we assume that our long-term goal is to permanently settle space. The experience gained from this sort of flight has little applicability to planetary resource utilization, long-term life support or other technologies needed for settlement.  

If we are to have a program of manned space exploration, we must decide what the long-term goals of such a program should be, and we should align our actions with those goals. When resources such as funding are limited, space agencies and political leaders should not squander these limited resources on missions that make no sense. Instead, the limited funding should be used to continue toward our long-term goals, accepting a slower pace or slight scale-back in mission scope.  Establishing a permanent human settlement in space is a noble goal, one that will eventually redefine humanity. Like explorers before us, it is also not a goal that will be achieved in a short period of time. We would be wise to keep our eyes on that goal and the road needed to get us there. And the next likely stop on that road is a permanent home just above our heads, on the surface of the brightest light in the night sky.  

Paul Brower is an aerospace systems engineer on the operations team for the O3b Networks satellite fleet. He previously worked in mission control at NASA for 10 years.
Recently, several space advocacy groups joined forces to form the Alliance for Space Development. Their published objectives include a mention of obvious near-term goals such as supporting the commercial crew program, transitioning from use of the International Space Station to future private space stations and finding ways to reduce the cost of access to space.
What is notably missing from these objectives and those of many other space agencies, companies and advocacy groups is any mention of building a permanent settlement on the moon. It’s as if the lunar surface has become our crazy uncle that we all acknowledge exists but we’d prefer not to mention (or visit).
What made the next logical step in mankind’s progression beyond the bounds of Earth such a taboo subject?
If, as the Alliance for Space Development suggests, our nation wishes to move toward a path of permanent space settlements, the most logical step is our own planet’s satellite.
Lunar base conception
A 2006 NASA conception of a lunar base. Credit: NASA
A base on the lunar surface is a better place to study space settlement than a space station or Mars for many reasons. Unlike a space station, the base does not have to contend with aerodynamic drag, attitude control issues or contamination and impingement from its own thrusters. Unlike a space station, which exists in a total vacuum and resource void, a lunar base has access to at least some surface resources in the forms of minerals, albeit fewer than might be available on Mars.
Many people naturally want to go directly to Mars as our next step. Even SpaceX has publicly stated this as its ultimate goal, with SpaceX President Gwynne Shotwell noting that “we’re not moon people.” However, Mars makes sense only if we think the technology is ready to safely support humans on another surface for long periods of time. Furthermore, budget restrictions make an ambitious goal like going immediately to Mars an unlikely prospect. Why are we afraid to take the seemingly necessary baby steps of developing the technology for a long-term base on a surface that can be reached in mere days instead of months?
The tendency to want to skip a lunar settlement is not a new phenomenon. Even before the first landing on the moon, U.S. and NASA political leadership was contemplating the future of manned space, and few of the visions involved a lunar base. The early space program was driven by Cold War competition with Moscow, and the kinds of ideas that circulated at the time involved milestones that seemed novel such as reusable spaceplanes, nuclear-powered rockets, space stations and missions to Mars. When the United States was on the verge of a series of landings on the moon, building a permanent base just didn’t seem like much of a new giant leap.
NASA's Constellation
NASA’s Constellation program, featuring the Orion manned capsule set atop the Ares 1 launch vehicle, was meant to send astronauts back to the moon. Credit: NASA
The idea of a lunar landing mission was not reintroduced seriously until the George W. Bush administration and the introduction of the Constellation program. This program came at a complex time for NASA: The space shuttle was recovering from the Columbia disaster, the space station was in the midst of construction and the United States found itself with large budget deficits. However, despite its budgetary and schedule problems, which are common in any serious aerospace development project from space programs to jumbo-jet development, it provided NASA with a vision and a goal that were reasonable and sensible as next steps toward a long-term future of exploration beyond Earth.
Constellation was nevertheless canceled, and we have since returned to a most uncommon sense.
The decision to avoid any sort of lunar activity in current space policy may have been biased by the Obama administration’s desire to move as far away as possible from the policies of the previous administration. Regardless of the cause, discussion of returning to the moon is no longer on the table.
Without the moon, the only feasible mission that NASA could come up with that is within reach given the current technology and budget is the Asteroid Redirect Mission.
Even planetary scientists have spoken out against the mission, finding that it will provide little scientific value. It will also provide limited engineering and technology value, if we assume that our long-term goal is to permanently settle space. The experience gained from this sort of flight has little applicability to planetary resource utilization, long-term life support or other technologies needed for settlement.
Advertisement
If we are to have a program of manned space exploration, we must decide what the long-term goals of such a program should be, and we should align our actions with those goals. When resources such as funding are limited, space agencies and political leaders should not squander these limited resources on missions that make no sense. Instead, the limited funding should be used to continue toward our long-term goals, accepting a slower pace or slight scale-back in mission scope.
Establishing a permanent human settlement in space is a noble goal, one that will eventually redefine humanity. Like explorers before us, it is also not a goal that will be achieved in a short period of time. We would be wise to keep our eyes on that goal and the road needed to get us there. And the next likely stop on that road is a permanent home just above our heads, on the surface of the brightest light in the night sky.

Paul Brower is an aerospace systems engineer on the operations team for the O3b Networks satellite fleet. He previously worked in mission control at NASA for 10 years.
- See more at: http://spacenews.com/op-ed-why-the-u-s-gave-up-on-the-moon/#sthash.czfTscvg.dpuf

View Article Here Read More

What Would It Be Like to Live on Mercury?


Mercury With Subtle Colors
Mercury's extreme temperatures and lack of an atmosphere would make it very difficult, if not impossible, for people to live on the planet. Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington


Excerpt from  space.com
By Joseph Castro, Space.com Contributor


Have you ever wondered what it might be like to homestead on Mars or walk on the moons of Saturn? So did we. This is the first in Space.com's 12-part series on what it might be like to live on or near planets in our solar system, and beyond. Check back each week for the next space destination.
With its extreme temperature fluctuations, Mercury is not likely a planet that humans would ever want to colonize. But if we had the technology to survive on the planet closest to the sun, what would it be like to live there?

To date, only two spacecraft have visited Mercury. The first, Mariner 10, conducted a series of Mercury flybys in 1974, but the spacecraft only saw the lit half of the planet. NASA's MESSENGER spacecraft, on the other hand, conducted flybys and then entered Mercury's orbit — in March of 2013, images from the spacecraft allowed scientists to completely map the planet for the first time.



MESSENGER photos of Mercury show that the planet has water ice at its poles, which sit in permanent darkness. Mining this ice would be a good way to live off the land, but setting up bases at the poles might not be a good idea, said David Blewett, a participating scientist with the Messenger program.

"The polar regions would give you some respite from the strength of the sun on Mercury," Blewett told Space.com. "But, of course, it's really cold in those permanently shadowed areas where the ice is, and that presents its own challenge."

A better option, he said, would probably be to set up a home base not far from one of the ice caps, perhaps on a crater rim, and have a water mining operation at the pole.

Still, dealing with extreme temperatures on Mercury would likely be unavoidable: Daytime temperatures on the planet can reach 800 degrees Fahrenheit (430 degrees Celsius), while nighttime temperatures can drop down to minus 290 degrees Fahrenheit (minus 180 degrees Celsius).

Scientists once believed Mercury was tidally locked with the sun, meaning that one side of the planet always faces the sun because it takes the same amount of time to rotate around its axis as it does to revolve around the star. But we now know that Mercury's day lasts almost 59 Earth days and its year stretches for about 88 Earth days.

Interestingly, the sun has an odd path through the planet's sky over the course of Mercury's long day, because of the interaction between Mercury's spin rate and its highly elliptical orbit around the sun.

"It [the sun] rises in the east and moves across the sky, and then it pauses and moves backwards just a tad. It then resumes its motion towards the west and sunset," said Blewett, adding that the sun appears 2.5 times larger in Mercury's sky than it does in Earth's sky.

And during the day, Mercury's sky would appear black, not blue, because the planet has virtually no atmosphere to scatter the sun's light. "Here on Earth at sea level, the molecules of air are colliding billions of times per second," Blewett said. "But on Mercury, the atmosphere, or 'exosphere,' is so very rarefied that the atoms essentially never collide with other exosphere atoms." This lack of atmosphere also means that the stars wouldn't twinkle at night.



Without an atmosphere, Mercury doesn't have any weather; so while living on the planet, you wouldn't have to worry about devastating storms. And since the planet has no bodies of liquid water or active volcanoes, you'd be safe from tsunamis and eruptions.

But Mercury isn't devoid of natural disasters. "The surface is exposed to impacts of all sizes," Blewett said. It also may suffer from earthquakes due to compressive forces that are shrinking the planet (unlike Earth, Mercury doesn't have tectonic activity).

Mercury is about two-fifths the size of Earth, with a similar gravity to Mars, or about 38 percent of Earth's gravity. This means that you could jump three times as high on Mercury, and heavy objects would be easier to pick up, Blewett said. However, everything would still have the same mass and inertia, so you could be knocked over if someone threw a heavy object at you, he added.

Finally, you can forget about a smooth Skype call home: It takes at least 5 minutes for signals from Mercury to reach Earth, and vice versa.

View Article Here Read More

An Astronomical First: Ground Telescope Spots Transiting Habitable Planet

The exoplanet 55 Cancri e has been observed passing in front of its star for the first time by a ground-based telescope. What do we know about this strange planet?Excerpt from techtimes.comThe exoplanet 55 Cancri e has been seen transiting, or passin...

View Article Here Read More

Rosetta mission: Philae lander bounces twice, lands on side ~ Cliff face blocking solar power


How Esa scientists believe Philae has landed on the comet – on its side
How Esa scientists believe Philae has landed on the comet – on its side. Photograph: European Space Agency/Reuters


Excerpt from
theguardian.com


Rosetta mission controllers must decide whether to risk making lander hop from shadow of cliff blocking sunlight to its solar panels.


The robotic lander that touched down on a comet on Wednesday came to rest on its side in the shadow of a cliff, according to the first data beamed home from the probe.

Pictures from cameras on board the European Space Agency’s Philae lander show the machine with one foot in the sky and lodged against a high cliff face that is blocking sunlight to its solar panels.
The precarious resting place means mission controllers are faced with some tough decisions over whether to try and nudge the spacecraft into a sunnier spot. If successful, that would allow Philae to fully recharge its batteries and do more science on the comet, but any sudden move could risk toppling the lander over, or worse, knock it off the comet completely.

The washing machine-sized lander was released by its Rosetta mother ship at 0835am GMT on Wednesday morning and touched down at a perfect spot on the comet’s surface. But when anchoring harpoons failed to fire, the probe bounced back off into space. So weak is the gravitational pull of the comet that Philae soared 1km into the sky and did not come down again until two hours later. “We made quite a leap,” said Stephan Ulamec, the Philae lander manager.

In the time it took the probe to land for the second time, the comet had rotated, bringing more treacherous terrain underneath. The spacecraft bounced a second time and finally came to a standstill on its side at what may be the rim of an enormous crater.

“We bounced twice and stopped in a place we’ve not entirely located,” said Jean-Pierre Bibring, Philae’s lead scientist. Teams of scientists are now trying to work out where the probe is. What mission controllers do know is that they are not where they hoped to be. “We are exactly below a cliff, so we are in a shadow permanently,” Bibring added.

With most of Philae in the dark, the lander will receive only a fraction of the solar energy that Esa had hoped for. The spacecraft needs six or seven hours of sunlight a day but is expected to receive just one and a half. Though it can operate for 60 hours on primary batteries, the probe must then switch to its main batteries which need to be recharged through its solar arrays. If Philae’s batteries run out it will go into a hibernation mode until they have more power.

The spacecraft was designed with landing gear that could hop the probe around, but from its awkward position on its side the option is considered too risky.

Though caught in a tight spot, the Philae lander’s systems appear to be working well. The Rosetta spacecraft picked up the lander’s signal on Thursday morning and received the first images and more instrument data from the surface of the comet.

One of Philae’s major scientific goals is to analyse the comet for organic molecules. To do that, the lander must get samples from the comet into several different instruments, named Ptolemy, Cosac and Civa. There are two ways to do this: sniffing and drilling. Sniffing involves opening the instruments to allow molecules from the surface to drift inside. The instruments are already doing this and returning data.

Panoramic view around the point of Philae's final touchdown on the surface of comet 67P, taken when Rosetta was about 18km from centre of comet. Parts of Philae's landing gear can be seen in this picture.
Panoramic view around the point of Philae’s final touchdown on the surface of comet 67P, taken when Rosetta was about 18km from centre of comet. Parts of Philae’s landing gear can be seen in this picture.Photograph: European Space Agency/AFP/Getty Images

Drilling is much riskier because it could make the lander topple over... Pushing down into the surface will push the lander off again. “We don’t want to start drilling and end the mission,” said Bibring.
But the team has decided to operate another moving instrument, named Mupus, on Thursday evening. This could cause Philae to shift, but calculations show that it would be in a direction that could improve the amount of sunlight falling on the probe. A change in angle of only a few degrees could help. A new panoramic image will be taken after the Mupus deployment to see if there has been any movement.

Meanwhile, the Rosetta orbiter team will continue to try to pinpoint Philae’s position.

View Article Here Read More

How can there be ice on Scorching Mercury? NASA Report

NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washingtonnasa.govMESSENGER Finds New Evidence for Water Ice at Mercury's Poles Mercury's North Polar Region Acquired By The Arecibo Observatory A Mosaic of MESSEN...

View Article Here Read More

THERE ARE NO BLACK HOLES, ONLY GREY HOLES, CLAIMS STEPHEN HAWKING




dailymail.co.uk

Earlier this year Professor Stephen Hawking shocked physicists by saying 'there are no black holes'.
In a paper published online, Professor Hawking instead argues there are 'grey holes'
'The absence of event horizons means that there are no black holes - in the sense of regimes from which light can't escape to infinity,' he says in the paper, called Information Preservation and Weather Forecasting For Black Holes.
He says that the idea of an event horizon, from which light cannot escape, is flawed.
He suggests that instead light rays attempting to rush away from the black hole’s core will be held as though stuck on a treadmill and that they can slowly shrink by spewing out radiation.  
One of the reasons black holes are so bizarre is that they pit two fundamental theories of the universe against each other.
Namely, Einstein’s theory of gravity predicts the formation of black holes. But a fundamental law of quantum theory states that no information from the universe can ever disappear.
Efforts to combine these two theories proved problematic, and has become known as the black hole information paradox - how can matter permanently disappear in a black hole as predicted?
Professor Mersini-Houghton’s new theory does manage to mathematically combine the two fundamental theories, but with unwanted effects for people expecting black holes to exist.
‘Physicists have been trying to merge these two theories - Einstein’s theory of gravity and quantum mechanics - for decades, but this scenario brings these two theories together, into harmony,’ said Professor Mersini-Houghton.
‘And that’s a big deal.’

View Article Here Read More

7 Types of Non-Believers Who Don’t Need Religion

Valerie Tarico, AlterNetReligious labels help shore up identity. So what are some of the things non-believers can call themselves?Catholic, born-again, Reformed, Jew, Muslim, Shiite, Sunni, Hindu, Sikh, Buddhist…religions give people labels. The downside can be tribalism, an assumption that insiders are better than outsiders, that they merit more compassion, integrity and generosity or even that violence toward “infidels” is acceptable. But the upside is that religious o [...]

View Article Here Read More

Black holes do NOT exist and the Big Bang Theory is wrong, claims scientist – and she has the maths to prove it




dailymail.co.uk

By Jonathan O’Callaghan

  • Scientist claims she has mathematical proof black holes cannot exist
  • She said it is impossible for stars to collapse and form a singularity
  • Professor Laura Mersini-Houghton said she is still in 'shock' from the find
  • Previously, scientists thought stars much larger than the sun collapsed under their own gravity and formed black holes when they died
  • During this process they release a type of radiation called Hawking radiation
  • But new research claims the star would lose too much mass and wouldn't be able to form a black hole
  • If true, the theory that the universe began as a singularity, followed by the Big Bang, could also be wrong

  • When a huge star many times the mass of the sun comes to the end of its life it collapses in on itself and forms a singularity – creating a black hole where gravity is so strong that not even light itself can escape.
    At least, that’s what we thought.
    A scientist has sensationally said that it is impossible for black holes to exist – and she even has mathematical proof to back up her claims.
    If true, her research could force physicists to scrap their theories of how the universe began.
    A scientist from University of North Carolina states she has mathematical proof that black holes (illustrated) can't exist. She said it is impossible for stars to collapse and form a singularity. Previously, scientists thought stars  larger than the sun collapsed under their own gravity and formed black holes as they died

    A scientist from University of North Carolina states she has mathematical proof that black holes (illustrated) can’t exist. She said it is impossible for stars to collapse and form a singularity. Previously, scientists thought stars larger than the sun collapsed under their own gravity and formed black holes as they died
    The research was conducted by Professor Laura Mersini-Houghton from the University of North Carolina at Chapel Hill in the College of Arts and Scientists.

    She claims that as a star dies, it releases a type of radiation known as Hawking radiation – predicted by Professor Stephen Hawking.

    THE BLACK HOLE INFORMATION PARADOX

    One of the biggest unanswered questions about black holes is the so-called information paradox.
    Under current theories for black holes it is thought that nothing can escape from the event horizon around a black hole – not even light itself.
    Inside the black hole is thought to be a singularity where matter is crushed to an infinitesimally small point as predicted by Einstein’s theory of gravity.
    However, a fundamental law of quantum theory states that no information from the universe can ever disappear.
    This creates a paradox; how can a black hole make matter and information ‘disappear’?
    Professor Mersini-Houghton’s new theory manages to explain why this might be so – namely because black holes as we know them cannot exist.
    However in this process, Professor Mersini-Houghton believes the star also sheds mass, so much so that it no longer has the density to become a black hole.
    Before the black hole can form, she said, the dying star swells and explodes.
    The singularity as predicted never forms, and neither does the event horizon – the boundary of the black hole where not even light can escape.
    ‘I’m still not over the shock,’ said Professor Mersini-Houghton.
    ‘We’ve been studying this problem for a more than 50 years and this solution gives us a lot to think about.’
    Experimental evidence may one day provide physical proof as to whether or not black holes exist in the universe.
    But for now, Mersini-Houghton says the mathematics are conclusive.
    What’s more, the research could apparently even call into question the veracity of the Big Bang theory.
    Most physicists think the universe originated from a singularity that began expanding with the Big Bang about 13.8 billion years ago.
    If it is impossible for singularities to exist, however, as partially predicted by Professor Mersini-Houghton, then that theory would also be brought into question.

    THIS is what a black hole looks like – simulation shows disc…
    During the collapse process stars release a type of radiation called Hawking radiation (shown). But Professor Mersini-Houghton claims this process means the star loses too much mass and can't form a black hole. And this also apparently means the Big Bang theory, that the universe began as a singularity, may not be correct
    During the collapse process stars release a type of radiation called Hawking radiation (shown). But Professor Mersini-Houghton claims this process means the star loses too much mass and can’t form a black hole. And this also apparently means the Big Bang theory, that the universe began as a singularity, may not be correct

    THERE ARE NO BLACK HOLES, ONLY GREY HOLES, CLAIMS HAWKING

    Earlier this year Professor Stephen Hawking shocked physicists by saying ‘there are no black holes’.
    In a paper published online, Professor Hawking instead argues there are ‘grey holes’
    ‘The absence of event horizons means that there are no black holes – in the sense of regimes from which light can’t escape to infinity,’ he says in the paper, called Information Preservation and Weather Forecasting For Black Holes.
    He says that the idea of an event horizon, from which light cannot escape, is flawed.
    He suggests that instead light rays attempting to rush away from the black hole’s core will be held as though stuck on a treadmill and that they can slowly shrink by spewing out radiation.
    One of the reasons black holes are so bizarre is that they pit two fundamental theories of the universe against each other.
    Namely, Einstein’s theory of gravity predicts the formation of black holes. But a fundamental law of quantum theory states that no information from the universe can ever disappear.
    Efforts to combine these two theories proved problematic, and has become known as the black hole information paradox – how can matter permanently disappear in a black hole as predicted?
    Professor Mersini-Houghton’s new theory does manage to mathematically combine the two fundamental theories, but with unwanted effects for people expecting black holes to exist.
    ‘Physicists have been trying to merge these two theories – Einstein’s theory of gravity and quantum mechanics – for decades, but this scenario brings these two theories together, into harmony,’ said Professor Mersini-Houghton.
    ‘And that’s a big deal.’

View Article Here Read More
Older posts

Creative Commons License
This work is licensed under a
Creative Commons Attribution 4.0
International License
.
unless otherwise marked.

Terms of Use | Privacy Policy



Up ↑