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Gravitational waves

Simulation of the collision of two small but compact neutron stars. Such a rare event is expected to create both gravitational waves and a gamma-ray burst, both of which were observed on August 17, 2017. Source: University of Warwick/Mark Garlick.

For the first time, gravitational waves and light waves were discovered from the same event - the merger of two neutron stars

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Imaging a kilonova: the merger and collision of two tiny but highly compressed neutron stars. Source: ESO/L. Calçada/M. Kornmesser.

Observed for the first time: collision and merger of two neutron stars

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Simulation of the merger of two black holes, the existence of which was indicated by the gravitational waves recorded by LIGO in 2017. Source: The SXS (Simulating eXtreme Spacetimes) Project.

Is dark matter made of black holes?

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What is the matrix we live in? Image: pixabay.

Einstein - the man who started to take us out of the matrix (part 3): there are gravitational waves!

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The LIGO facility in Hanford, Washington. Photo: CALTECH

"The winners of the Nobel Prize in Physics were themselves surprised by the strength of the signal of the first gravitational wave event"

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From right to left: Prof. Emeritus Rainer Weiss, Ian Driver (brother of Prof. Emeritus Ronald Driver), Technion President Prof. Peretz Lavie and Prof. Emeritus Kip Stefan Thorn. Photo: Nitzan Zohar, Technion Spokesperson.

From the Harvey Prize at the Technion - to the Nobel Prize in Stockholm

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Simulation of the merger of two black holes, the existence of which was indicated by the gravitational waves recorded by LIGO in 2017. Source: The SXS (Simulating eXtreme Spacetimes) Project.

Nobel Prize in Physics for the discovery of gravitational waves

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An artist's illustration of two merging black holes that are theorized to be the source of gravitational waves. Illustration: Bohn, Throwe, Hébert, Henriksson, Bunandar, Taylor, Scheel / SXS

A collaboration between three observatories resulted in another discovery of gravitational waves

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The 2016 Harvey Awards ceremony. Photo: Nitzan Zohar, Technion spokesperson.

The 2016 Harvey Prize was awarded for the discovery of gravitational waves and the development of optogenetics

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Illustration illustrating what two merging black holes look like similar to those detected by LIGO. The black holes rotate misaligned meaning they have different orientations relative to the general motion of the binary orbit. LIGO has found clues that the orbit of at least one black hole in the GW170104 system was previously undetected through its orbital motion before it merged with its partner. Image: LIGO/Caltech/MIT/Aurore Simonnet

A third gravitational wave event has been discovered; Confirms the existence of a new type of black holes

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The Wirgo gravitational wave detector near Pisa in Italy is supposed to return to operation in the spring of 2017, and thus it is possible that three detectors of this type will operate together, in three different places in the world, for at least a month. Source: The Virgo collaboration.

A new detector will determine the origin of gravitational waves

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The second discovery of gravitational waves in June 2016. The first ever was in February - illustration: from Wikipedia

Gravitational waves: the most important discovery of 2016 according to the editors of Science magazine

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Einstein's mistakes

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A laser beam that travels 1,600 km in a tube. LIGO detector | Photo: NASA

First evidence for the discovery of gravitational waves

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Gravitational waves emanating from the merger of two black holes. Image: NASA/JPL

Proof of Einstein's theory of general relativity: "The discovery of gravitational waves opens a new window to the universe"

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Gravitational waves. Illustration: shutterstock

Have gravitational waves been found?

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suds. Illustration: shutterstock

Genesis was empty - how was our universe created? - The fifth and last part

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In this image you see real photographs of the cosmic background radiation as it is measured in the sky (right side). Above you see the cosmic radiation as it was first detected in 1965, the image is colored and the colors indicate the temperature (or frequency) of the radiation. Notice how uniform it is in temperature (there is only one green color). Middle image - in 1992 the Kobe satellite finds tiny differences in temperature (six digits after the decimal point). In the lower image you see a similar image with better spatial resolution taken in 2003. The red band in the middle is not related to the cosmic background radiation, it is micro radiation emitted from the plane of our galaxy

Genesis was empty - how was our universe created? - Part IV

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Wilson (left) and Penzias (right) against the background of the shofar antenna they used when discovering the cosmic background radiation. Source: Wikipedia

Genesis was empty - how was our universe created? - Part III

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An approximate model of the hydrogen atom, the simplest and most common atom in the universe consisting of a proton in the center and an electron around it. All the hydrogen in the universe was created about 380,000 years after the big bang.

Genesis was empty - how was our universe created? - Part II'

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the expanding universe. Illustration: from Wikipedia

Genesis was empty - how was our universe created? - Part a'

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Mark Kamionkowski. From his home page on the Johns Hopkins University website

"We received an important message from the first fractions of a second of the universe after the Big Bang"

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expansion of the universe. Illustration: shutterstock

Inflation, Gravitational Waves and the Cosmic Background Radiation: Theory and Experimental Verification

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the big Bang. Illustration: shutterstock

An attentive ear to the echoes of the big bang / Ross D. Andersen

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In the yellow circle you see a normal form of polarization (E-mode) and in the blue circle you see the form of polarization and the size of the polarization that must have created only gravitational waves during inflation. You can see the same special polarization in the background radiation in the top image as well. The black lines mark the direction and polarization of the radiation. Once the team measured this polarization shape they were able to confirm both the gravitational waves and the inflation phase. In the bottom picture you see a drawing starting on the left side where the big bang happened and immediately after it the inflation (the yellow part). After the end of inflation the universe expands much more slowly (the black part) until the present day. Today we measure the cosmic background radiation that came out when the universe was 380,000 years old and pass it through polarizers to measure the polarization of the radiation (the blue part). Image: Harvard Smithsonian Center for Astrophysics

First direct evidence of the existence of gravitational waves that caused the universe to swell immediately after the big bang

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