"For sure, there are regions of space with far less matter — stars, gas, dust, and even dark matter — than average. In fact, there are other voids that are of comparable magnitude that have been discovered since. One could cause this effect by a large region that was completely empty of galaxies, which is the “hole in the Universe” option that many reporters (and, ahem, press releases) flock to. But it could also be caused by something far less spectacular: a minor underdensity over a larger volume/longer slice of the Universe. Until we do a dedicated, 3D cosmic map (using spectroscopy to verify the redshift of the observed galaxies) over the region of interest, we won’t know for certain how these galaxies are distributed. But as far as what you’ve heard, there may not be an interesting void there at all, much less a region with no matter of any type." (Is This Actually A Hole In The Universe?-ForbesCom)
Why all the galaxies and stars near the hole do not follow the curved path of the hole? A hole in the universe as proof that in reality there is no such thing as warped space. A very big hole in the universe truly a confirmation by the universe itself / self-proving that the general relativity theory and big bang theory was wrong.
There’s basically a hole in the universe -- a region where there’s much less matter than there should be. And we don’t know why it’s there.
http://www.forbes.com/sites/startswithabang/2016/03/15/10-quantum-truths-about-our-universe/#55f85ceb4642
http://www.forbes.com/sites/startswithabang/2016/03/18/ask-ethan-could-dark-energy-recycle-the-universe/#66d6e361cd24
http://www.alternativephysics.org/book/GRexperiments.htm
http://www.telegraph.co.uk/news/science/space/12194757/Black-hole-emitted-red-flashes-with-power-of-1000-suns-study-reveals.html
http://scienceblogs.com/startswithabang/2011/04/20/how-gravitational-lensing-show/
In the beginning .......
In 1916, Albert Einstein published a paper using general relativity to predict gravitatinal waves - a ripples in the fabric of space-time resulting from the most violent phenomena in our distant universe. ......
The present ,,,,,
At this point in our NSF strongly I thing most of us know what happened, and I do not want to dwell on the discovery here. I leave it to my colleagues to discuss the events of Sebtember 14, 2015, a mere four days after the start-up of AdvLIGO. That date marks the first direct detection of a gravitational waves, resulting, remarkably, from the collision and merger of two black holes approxiamately 1.3 billion years ago. It has taken that long for the signal to propagate to the detectors in Livingston, Lousiana and Hanford, Washington and produce "chirp", at 100 millisecond transient signal that opened a new window on the universe.
The Future .....
The discovery in Sebtember is a beginning, not an end. ......
In summary ...
Mr.Chairman, this historic detection of gravitational waves by LIGO illustrates the importance and singular role of NSF. ....
This conclude my testimony and I will be pleased to answer any question.
(Testimony of Dr.F.Fleming Crim, Assistant Director Math and Physical Sciences - Directorate National Science Foundation, on Unlocking the Secrets of the Universe Gravitational Waves, February 24, 2016, http://science.house.gov)
LIGO Team Testifies at US Congress on the Discovery
24 February 2016 -- As a follow-up to the announcement of LIGO's first observation of gravitational waves,
the House Committee on Science, Space, and Technology has asked LIGO Scientific Collaboration members
to testify on the discovery, its meaning for science and society, and what the future may hold.
LSC members to testify at the Full House Committee Hearing were the LIGO Lab Executive Director David
Reitze, the LSC Spokesperson Gabriela Gonzalez, and the LIGO MIT Director David Shoemaker.
Details
at house.gov.
Watch the hearing below:
- See more at: http://ligo.org/news/#sthash.f2NPd2Jy.dpuf
On Feb 24, 2016, LIGO members testified at US Congress on the discovery of gravitational waves. Left to right: Assistant Director of the NSF's Directorate of Mathematical and Physical Sciences Dr. Fleming Crim, LIGO Lab Director Dr. David Reitze, LSC Spokesperson Dr. Gabriela Gonzalez, LIGO MIT Director Dr. David Shoemaker. Image credit: Caltech/MIT/LIGO Lab. - See more at: http://ligo.org/news/#sthash.f2NPd2Jy.dpuf
LIGO Team Testifies at US Congress on the Discovery
24 February 2016 -- As a follow-up to the announcement of LIGO's first observation of gravitational waves, the House Committee on Science, Space, and Technology has asked LIGO Scientific Collaboration members to testify on the discovery, its meaning for science and society, and what the future may hold. LSC members to testify at the Full House Committee Hearing were the LIGO Lab Executive Director David Reitze, the LSC Spokesperson Gabriela Gonzalez, and the LIGO MIT Director David Shoemaker. Details at house.gov.
(http://ligo.org/news/)
LIGO Team Testifies at US Congress on the Discovery
24 February 2016 -- As a follow-up to the announcement of LIGO's first observation of gravitational waves,
the House Committee on Science, Space, and Technology has asked LIGO Scientific Collaboration members
to testify on the discovery, its meaning for science and society, and what the future may hold.
LSC members to testify at the Full House Committee Hearing were the LIGO Lab Executive Director David
Reitze, the LSC Spokesperson Gabriela Gonzalez, and the LIGO MIT Director David Shoemaker.
Details
at house.gov.
Watch the hearing below:
- See more at: http://ligo.org/news/#sthash.f2NPd2Jy.dpuf
"When Einstein predicted general relativity, who would have predicted that we'd use it every day when we use our cellphones?" he said. (General relativity provides an understanding how gravity influences the passing of time, and this information is necessary for GPS technology, which uses satellites that orbit further away from the gravitational pull of the Earth than people on the surface)
. - See more at: http://www.space.com/31922-gravitational-waves-detection-what-it-means.html#sthash.A1JNvkme.dpuf
My Comment in: http://www.space.com/32232-big-breakthroughs-cannot-be-rushed.html
"
The gravitational wave
discovery is a beginning, not an end. It marks the birth of the new era
in physics : the end of the 9 biggest unsolved mysteries in physics.
Black holes do not exist, the Expanding Universe and Big Bang theory are
not correct. Isaac Newton was right and Albert Einstein was wrong.
1.Einstein's
proving method for his hypothesis the deflection of light by the Sun is
not scientific and deeply wrong. The evidence in print on the book
'Universe and Dr.Einstein', Lincoln Barnett, London 1949,page 78-79,
this book preface by Albert Einstein himself.
2.Einstein's thought experiments incomprehensive, illogical, and misleading.
3.The Equivalence Principle is false.
4.The
truth of the deflection of light : is caused by refraction
(astronomical refraction and terrestrial refraction), not by gravity
field of massive object /the Sun.
In astronomy, deflection of starlight is something very common cause by refraction.
5.Lensing cause by refraction, not gravity.
What
is gravity? Gravity is the force that attracts two bodies toward each
other, the force that causes apples to fall toward the ground and the
planets to orbit the sun. The more massive an object is, the stronger
its gravitational pull.(livescience).
In reality, the precise strength of Earth's gravity varies depending on location (wikipedia).
In
general, gravity is the force due to the effects of well balance
universe. There is no such thing as spacetime or warped space. Warped
space do not make sense and misleading.Gravity is the real force to
maintain the well balanced universe.
Where does Earth's gravity come from?
It
is not impossible energy for Earth's gravity come from Earth's
Radiation. In fact, Earth received energy in the form of radiation from
the Sun. For the Earth to remain in balance the energy coming into and
leaving the Earth must equal.
The new era of physics is the era to be honest in science."
My comment in:http://www.space.com/31922-gravitational-waves-detection-what-it-means.html
"
Isaac Newton was right and Albert Einstein was wrong. Gravity is force. Where does the energy for earth's gravity come from? It is not impossible energy for Earth's gravity come from Earth's Radiation. In fact, Earth received energy in the form of radiation from the Sun, and for the Earth to remain in balance the energy coming into and leaving the Earth must equal.
Einstein's proving method for his hypothesis the deflection of light by the Sun is not scientific and deeply wrong. Please see on the book 'Unverse and Dr.Einstein', Lincoln Barnett, London 1949, page 78-79.
In Astronomy, the deflection of starlight is something very common cause by refraction - astronomical refraction and terrestrial refraction -, not by gravity. Also in the case of lensing (gravity lensing?), lensing by refraction, not gravity.
In reality,there is no such as spacetime or warped space. Gravity is the force to maintain the well balance of the universe "
My comment in :http://www.space.com/31916-what-gravitational-waves-sound-like-video.html
"
Einstein's manuscript 1916 predicted that two celestial bodies in orbit will generate invisible ripples in spacetime, not two celestial bodies collide. And not two black holes collide, the fact that Einstein is The Reluctant Father of Black Holes.
We can hear gravitational waves. We can hear the universe ? That sounds could not transmit through vacuum.
Can not accept the fact that general relativity was wrong, and always looking for arguments that are often inconsistent and funny,"
My comment in:http://www.nature.com/news/young-scientists-poised-to-ride-the-gravitational-wave-1.19383
"According Einstein's manuscript 1916, Einstein predicted that if two
celestial bodies in orbit will generate invisible ripples in spacetime,
not two objects/black holes collide. Two celestial bodies in orbit can
not be assumed as two objects/black holes collide.
I think a new
era of physics is the era to get the answers what wrong with modern
physics, and why we still found the 9 biggest unsolved mysteries in
physics. A new era is the era 'to be honest in science'.
I am
author of ' Eclipse 1919 and the general relativity theory' and I found
the evidence in print that says Einstein' proving method on his
hypothesis the deflection of light by the Sun isn't scientific and
deeply wrong. Please read decription of the evidence in :
http://oejicoba.blogspot.co.id...
Please
read more :Einstein's thought experiments and the equivalence principle
is false, the end of the 9 biggest unsolved mysteries in physics, where
does gravity come from, and about the truth of deflection of light."
https://www.quantamagazine.org/20160218-gravitational-waves-kennefick-interview/
gravity as the effect of curves in “space-time”
In 1955, Nathan Rosen tried to argue that gravitational waves don’t carry any energy, so they’re just a formal mathematical construct with no real physical meaning.
Science isn't consensus, if it's concensus, it isn't science.
If gravitational waves are not affected by gravity lensing, then under some lines of sight the associated gamma ray bursts would arrive with different delays potentially smoothing the signal, or producing multiple signals if the paths are significantly different in length.
Have short gravity lensed gamma ray bursts been detected in the past, via signal smoothing or multiple signals?
Also what does the 0.4 second delay of the gamma ray burst provide in the way of information about the location/distance of the event?
Based on this thought experiment, Einstein concluded that gravity is not a force of attraction, for no such force is required. Instead, it is something quite different — a curvature in the fabric of space-time.( http://www.thestar.com/news/insight/2012/08/18/einstein_discovered_that_gravity_is_not_a_force_but_a_curvature)
In general relativity, clocks at a position with lower gravitational potential – such as in closer proximity to a planet – are found to be running more slowly.
So my point is that it isn't meaningful to ask how a gravitational force affects time, because there isn't any such thing as a gravitational force. What does affect time, or more precisely spacetime, is the presence of matter, and that produces the appearance of a gravitation force. Your question should really be "How can (the curvature of) time affect gravity?" i.e. exactly the reverse of what you asked!
Gravity is currently understood to be curvature of spacetime, so mathematically it's unambiguous why gravity should affect time. But to leave it at that would be cheating, no? So I'll try to give an explanation of why you'd intuitively expect gravity to affect time. This is called the Einstein Tower thought experiment. If you've seen the phenomenon of time dilation in special relativity before, you'll notice that the way time behaves depends a lot on how light behaves. It's not crucial you know this but the spirit of the following explanation is the same.
Let's assume for a moment that gravity doesn't affect light in any way. Suppose you create a photon with energy $E$ on the ground and fire it up to the top of a tower where this photon is converted into an equivalent mass $m=E/c^2$. This mass will fall back to the ground and once it reaches the ground it will have gained extra energy $mgh$ because it fell through the gravitational field. If you started with energy $E$, you end up with energy $$E'=E+mgh=E(1+gh/c^2)$$ So every time you do this, you create energy! Surely something is wrong -- it must've been our assumption that gravity doesn't affect light. The most obvious fix then is to assume that the photon lost energy as it climbed up the gravitational field and that its energy at the top is $$E_{top}=E(1+gh/c^2)^{-1}$$ This is (a first approximation to) the phenomenon of gravitational red shift where photons lose energy as they climb out of a gravitational field.
Now, if you remember that the photon frequency is related to its energy by $E=h\nu$, you'll see that the frequency (~$1/T$ which is the "internal clock" of a photon) obeys the same relation as above. This is indicative of gravity affecting time -- in fact it's immediately obvious that any clock based on the frequency of light will run at a slower rate higher up in the gravitational field.( )
Gravitational time dilation has been experimentally measured using atomic clocks on airplanes. The clocks aboard the airplanes were slightly faster than clocks on the ground. The effect is significant enough that the Global Positioning System's artificial satellites need to have their clocks corrected.
Additionally, time dilations due to height differences of less than 1 meter have been experimentally verified in the laboratory.
Gravitational time dilation has also been confirmed by the Pound–Rebka experiment, observations of the spectra of the white dwarf Sirius B, and experiments with time signals sent to and from Viking 1 Mars lander.(wikipedia)
“Different parts of the universe are moving at different rates,” deGrasse Tyson said, “and time has some relative aspects to it. For example, the GPS satellites, the clocks on them tick at a different rate than clocks on Earth’s surface because when you move far away from the source of gravity, your time speeds up.” (http://www.rawstory.com/2013/09/neil-degrasse-tyson-explains-how-gravity-affects-the-flow-of-time/ )
Clocks in a gravitational force.
When comparing a clock under the influence of gravitational forces with one very far from such influences it is found that the first clock is slow compared to the second. To see this consider the same clock we used in the Special Theory of Relativity. For this experiment, however, imagine that the clock is being accelerated upward, being pulled by a crane. The clock gives off a short light pulse which moves towards the mirror at the top of the box, at the same time the mirror recedes from the pulse with even increasing speed (since the box accelerates). Still the pulse eventually gets to the mirror where it is reflected, now it travels downward where the floor of the box is moving up also with ever increasing velocity.
On the trip up the distance covered by light is larger than the height of the box at rest, on the trip down the distance is smaller. A calculation shows that the whole distance covered in the trip by the pulse is larger than twice the height of the box, which is the distance covered by a light pulse when the clock is at rest.
Since light always travels at the same speed, it follows that the time it takes for the pulse to go the round trip is longer when accelerating than when at rest: clocks slow down whenever gravitational forces are present.
This has an amazing consequence: imagine a laser on the surface of a very massive and compact planet (so that the gravitational field is very strong). An experimenter on the planet times the interval between two crests of the laser light waves and gets, say, a millionth of a second. His clock , however, is slow with respect to the clock of an observer far away in deep space, this observer will find that the time between two crests is larger. This implies that the frequency of the laser is larger on the planet than in deep space: light leaving a region where gravity is strong reddens. This is called the gravitational red-shift
( http://physics.ucr.edu/~wudka/Physics7/Notes_www/node89.html)
The Speed of Light and the Index of Refraction
"Nothing can travel faster than the speed of light."
"Light always travels at the same speed."
Have you heard these statements before? They are often quoted as results of Einstein's theory of relativity. Unfortunately, these statements are somewhat misleading. Let's add a few words to them to clarify. "Nothing can travel faster than the speed of light in a vacuum." "Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles). (http://www.rpi.edu/dept/phys/Dept2/APPhys1/optics/optics/node4.html )
Remember, it is not curved space, but the human mind which cannot comprehend infinity and eternity! ( http://www.freedomtek.org/en/texts/nikola_tesla_interview_1899.php)
In science fiction, space and time warps are a commonplace. They are used for rapid journeys around the galaxy, or for travel through time. But today's science fiction, is often tomorrow's science fact. So what are the chances for space and time warps. (http://www.hawking.org.uk/space-and-time-warps.html ).
Another piece of evidence is known as the time-delay experiment. The mass of the Sun warps space near it, therefore light passing near the Sun is doesn’t travel in a perfectly straight line. Instead it travels along a slightly curved path that is a bit longer. This means light from a planet on the other side of the solar system from Earth reaches us a tiny bit later than we would otherwise expect. The first measurement of this time delay was in the late 1960s by Irwin Shapiro. Radio signals were bounced off Venus from Earth when the two planets were almost on opposite sides of the sun. The measured delay of the signals’ round trip was about 200 microseconds, just as predicted by general relativity. This effect is now known as the Shapiro time delay, and it means the average speed of light (as determined by the travel time) is slightly slower than the (always constant) instantaneous speed of light. (http://www.universetoday.com/108740/how-we-know-gravity-is-not-just-a-force/ )