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Topic: Gravitational Waves
Pairs of black holes billions of times more massive than the Sun may be circling one another, generating ripples in space itself. The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has spent more than a decade using ground-based radio telescopes to look for evidence of these space-time ripples created by behemoth black holes. ![]() This illustration shows the NANOGrav project observing cosmic objects called pulsars in an effort detect gravitational waves – ripples in the fabric of space. The project is seeking a low-level gravitational wave background signal that is thought to be present throughout the universe. (NANOGrav/T. Klein) «Read the rest of this article» Sections: Technology | No Comments
NASA reports astronomers may have seen light from the merger of Two Black Holes
Since black holes and black hole mergers are completely dark, these events are invisible to telescopes and other light-detecting instruments used by astronomers. However, theorists have come up with ideas about how a black hole merger could produce a light signal by causing nearby material to radiate. ![]() This artist’s concept shows a supermassive black hole surrounded by a disk of gas. Embedded in this disk are two smaller black holes that may have merged together to form a new black hole. (Caltech/R. Hurt (IPAC)) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Spitzer Telescope observes orbit of one Black Hole around Larger Black Hole
The OJ 287 galaxy hosts one of the largest black holes ever found, with over 18 billion times the mass of our Sun. Orbiting this behemoth is another black hole with about 150 million times the Sun’s mass. ![]() This image shows two massive black holes in the OJ 287 galaxy. The smaller black hole orbits the larger one, which is also surrounded by a disk of gas. When the smaller black hole crashes through the disk, it produces a flare brighter than 1 trillion stars. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA Telescopes discover Electromagnetic waves from a Gravitational Wave SourceNASA’s Goddard Space Flight Center
The discovery was made using data from telescopes including NASA’s Chandra X-ray Observatory, Fermi Gamma-ray Space Telescope, Neil Gehrels Swift Observatory, the NASA/ESA Hubble Space Telescope, and the Discovery Channel Telescope (DCT). ![]() A distant cosmic relative to the first source that astronomers detected in both gravitational waves and light may have been discovered. This object, called GRB150101B, was first detected by identified as a gamma ray burst (GRB) by the NASA’s Fermi satellite in January 2015. (X-ray: NASA/CXC/GSFC/UMC/E. Troja et al.; Optical and infrared: NASA/STScI) «Read the rest of this article» Sections: Technology | No Comments
NASA Model gives new information on Spiraling Supermassive Black HolesWritten by Jeanette Kazmierczak
Just about every galaxy the size of our own Milky Way or larger contains a monster black hole at its center. Observations show galaxy mergers occur frequently in the universe, but so far no one has seen a merger of these giant black holes. ![]() This photo shows a frozen version of the simulation in the plane of the disk. (NASA’s Goddard Space Flight Center) «Read the rest of this article» Sections: Technology | No Comments
NASA uses Pulsars to detect Gravitational WavesWritten by Elizabeth Landau
So far, there have been five detections of gravitational waves, thanks to the Laser Interferometer Gravitational-Wave Observatory (LIGO) and, more recently, the European Virgo gravitational-wave detector. Using these facilities, scientists have been able to pin down the extremely subtle signals from relatively small black holes and, as of October, neutron stars. ![]() This computer simulation shows the collision of two black holes, which produces gravitational waves. (SXS) «Read the rest of this article» Sections: Technology | No Comments
NASA detects Gravitational Waves from Two merging Neutron StarsNASA Headquarters
Shortly after 5:41am PDT (8:41am EDT) on August 17th, 2017, NASA’s Fermi Gamma-ray Space Telescope picked up a pulse of high-energy light from a powerful explosion, which was immediately reported to astronomers around the globe as a short gamma-ray burst. The scientists at the National Science Foundation’s Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves dubbed GW170817 from a pair of smashing stars tied to the gamma-ray burst, encouraging astronomers to look for the aftermath of the explosion. ![]() An artist’s impression of gravitational waves generated by binary neutron stars. (R. Hurt/Caltech-JPL) «Read the rest of this article» Sections: Technology | No Comments
NASA discovers Dual Supermassive Black HolesWritten by Molly Porter
The new evidence reveals five pairs of supermassive black holes, each containing millions of times the mass of the Sun. These black hole couples formed when two galaxies collided and merged with each other, forcing their supermassive black holes close together. «Read the rest of this article» Sections: Technology | No Comments
NASA reports Radio Telescopes could soon detect Low-Frequency Gravitational WavesWritten by Elizabeth Ferrara
A new study from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has shown that low-frequency gravitational waves could soon be detectable by existing radio telescopes. ![]() Gravitational waves are ripples in space-time, represented by the green grid, produced by accelerating bodies such as interacting supermassive black holes. These waves affect the time it takes for radio signals from pulsars to arrive at Earth. (David Champion) «Read the rest of this article» Sections: Technology | No Comments
NASA Thruster system aboard LISA Pathfinder spacecraftWritten by Elizabeth Landau
LISA Pathfinder, led by the European Space Agency (ESA), is designed to test technologies that could one day detect gravitational waves. Gravitational waves, predicted by Einstein’s theory of general relativity, are ripples in spacetime produced by any accelerating body. ![]() The LISA Pathfinder spacecraft, which launched on Dec. 3, 2015, from Kourou, French Guiana, will help pave the way for a mission to detect gravitational waves. (ESA) «Read the rest of this article» Sections: Technology | No Comments
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