Johns Hopkins University (JHU) continues to pad its space community résumé with their interactive map, “The map of the observable Universe”, that takes viewers on a 13.7-billion-year-old tour of the cosmos from the present to the moments after the Big Bang. While JHU is responsible for creating the site, additional contributions were made by NASA, the European Space Agency, the National Science Foundation, and the Sloan Foundation.
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In this video we will talk about two of the most spectacular categories of astrophysical objects: what are magnetars and what are quasars. - - Subscribe for more videos ► Business Enquiries ► We have Another Channel ► "Down The Rabbit Hole" - -
This artist's concept shows the most distant supermassive black hole ever discovered. It is part of a quasar from just 690 million years after the Big Bang. Credit: Robin Dienel/Carnegie Institution for Science
Artist’s impression of ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun. Credit: ESO/M. Kornmesser
This illustration shows the evolution of the Universe, from the Big Bang on the left, to modern times on the right. Credit: NASA
Swift’s Hard X-ray Survey offers the first unbiased census of active galactic nuclei in decades. Dense clouds of dust and gas, illustrated here, can obscure less energetic radiation from an active galaxy’s central black hole. High-energy X-rays, however, easily pass through. Credit: ESA/NASA/AVO/Paolo Padovani
A billion years after the big bang, hydrogen atoms were mysteriously torn apart into a soup of ions. Credit: NASA/ESA/A. Felid (STScI)).
We puny humans think we can accelerate particles? Look how proud we are of the Large Hadron Collider. But any particle accelerator we build will pale in comparison to Quasars, nature’s champion accelerators. Those things are beasts. The term quasar is a contraction—albeit a clumsy one—of “quasi-stellar radio source.” When they were first discovered in the 1950s, it was because of their unexplained radio emissions. In images, they were just star-like points of light. So they were tagged as quasi-stellar radio sources.
A Hubble Space Telescope image of the disk of dust obscuring Centaurus A’s central region. Image Credit: NASA/ESA/Hubble
This is a Chandra X-ray Observatory image of Centaurus A. It shows a relativistic jet extending 30,000 light years from the central black hole. Image Credit: By R.Kraft (SAO) et al., CXO, NASA – http://apod.nasa.gov/apod/ap030705.html (image link)http://chandra.harvard.edu/photo/2001/0157blue/index.html (image link), Public Domain, https://commons.wikimedia.org/w/index.php?curid=536971
Colour composite image of Centaurus A, revealing the lobes and jets emanating from the active galaxy’s central black hole. This is a composite of images obtained with three instruments, operating at very different wavelengths. The 870-micron submillimetre data, from LABOCA on APEX, are shown in orange. X-ray data from the Chandra X-ray Observatory are shown in blue. Visible light data from the Wide Field Imager (WFI) on the MPG/ESO 2.2 m telescope located at La Silla, Chile, show the stars and the galaxy’s characteristic dust lane in close to “true colour”. By ESO/WFI (Optical); MPIfR/ESO/APEX/A.Weiss et al. (Submillimetre); NASA/CXC/CfA/R.Kraft et al. (X-ray) – http://www.eso.org/public/images/eso0903a/, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=5821706
The large central telescope in the HESS array. It was responsible for the first detection a a gamma ray burst in very high energy gamma rays. Image Credit: MPIK / Christian Föhr
This image from the study shows Centaurus A’s very high energy gamma emitting region in the white dashed line. Image Credit: HESS Collaboration.
Quasars are the most powerful sources of light in the universe, but sometimes they’re hard to find. A team of astronomers used the Chandra X-ray Space Telescope to find some diamonds in the rough. When gas finds itself in the center of a galaxy, it must come toe-to-toe with a truly terrible monster: a supermassive black hole. These black holes can devour entire stars whole, and they don’t mess around. As material falls towards the event horizon, it crams together into a small volume. The friction of that trek generates heat and light. When this happens, the galaxy is known as a quasar.
What’s better than a quasar? That’s right, two quasars. Astronomers have spotted for the first time two rare double-quasars, and the results show us the dynamic, messy consequences of galaxy formation. Every galaxy is thought to host a supermassive black hole in its center. When galaxies merge, their black holes merge along with them. During the height of the merger process, huge volumes of gas and dust swirl down to the center of the galaxy. As all that gas and dust compresses down into the black hole, it heats up. The forces are so intense that the cores of these galaxies become “quasars”, blazing brighter than millions of normal galaxies put together and beaming massive jets of radiation thousands of lightyears into space.
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What powers a quasar? Just how strong is a blazar? What’s the connection to giant black holes? I discuss these questions and more in today’s Ask a Spaceman! Full podcast episodes: Support: Follow: Follow: on twitter Follow:on Facebook Watch on YouTube: Go on an adventure: Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G., Matthew K., Kevin O., Justin R., Chris C., Helge B., Tim R., Nick T., Lars H., Ray S., John F., , Anilavadhanula, Mark R., and David B.! Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars
In the 1950’s radio astronomers got quite a surprise. They thought they were looking for interesting radio sources within the Milky Way galaxy, but instead they found points of super-intense radio emission apparently coming from deep space. They didn’t quite know what to make of them, but they did note that they were a) kind of star-like, and b) definitely some sort of object. A quasi-stellar object. A QSO. A Quasar.
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What powers a quasar? Just how strong is a blazar? What’s the connection to giant black holes? I discuss these questions and more in today’s Ask a Spaceman! Full podcast episodes: Support: Follow: Follow: on twitter Follow:on Facebook Watch on YouTube: Go on an adventure: Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G., Matthew K., Kevin O., Justin R., Chris C., Helge B., Tim R., Nick T., Lars H., Ray S., John F., , Anilavadhanula, Mark R., and David B.! Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars
The massive, hyper-luminous galaxy W0410-0913 and its surroundings, seen 12 billion years back in time. Credit: M. Ginolfi & G. Jones / VLT / ESO.
In this short video explainer, Universe Today publisher Fraser Cain investigates the most powerful objects in the Universe: quasars. In just the last few decades, our understanding of quasars has developed in leaps and bounds. . We now know what they are. And so will you
Artist’s impression of a distant quasar powered by a black hole with a mass two billion times that of the Sun. Credit: ESO/M. Kornmesser
A three-dimensional stereographic view of W0410-0913 (blue sphere) and its galactic neighbors (red spheres). Credit: Peter Laursen/NBI
Concept image of a galactic quasar. Such objects in the early Universe offer clues to conditions when they existed. Credit: ParallelVision, Pixabay
The quasar SDSS J165202.64+172852.3. On the left is a wide-field Hubble view of multiple galaxies in the field. In the center is a JWST NIRSpec composite of four narrow-band images together, which appears as a blurry rainbow of colors. On the right are the four individual narrow-band images of the quasar in red, orange, teal, and blue. ESA/Webb, NASA, CSA, D. Wylezalek, A. Vayner & the Q3D Team, N. Zakamska.
Concept image of a galactic quasar. Astronomers used the Event Horizon Telescope to study details at the heart of one like this called NRAO 530. Credit: ParallelVision, Pixabay
Light is an oscillating electromagnetic wave. If the waves have a preferred direction of oscillation, they are polarized. In space, moving hot gas, or ‘plasma’, threaded by a magnetic field emits polarized light. The polarized light rays that manage to escape the pull of the black hole travel to a distant camera. The intensity of those light rays and their direction are what we observe with the Event Horizon Telescope. Today, we reveal a breakthrough discovery: the Event Horizon Telescope has imaged polarized light close to the shadow of M87* for the very first time. Using this knowledge, we can map out the magnetic fields that surround the black hole, and connect them to the powerful jet of plasma it ejects. The Event Horizon Telescope (EHT) is an international collaboration that captured the first image of a black hole by creating a virtual Earth-sized telescope. To learn more, you can check out our website at Follow us on Twitter: Follow us on Facebook: Or follow us on Instagram: If you enjoyed this video, please like, comment, and subscribe! Credit: Producers: Radboud University, Goethe University Frankfurt Director: Sara Issaoun Writers: Sara Issaoun, Monika Moscibrodzka, Raquel Fraga Encinas, Christiaan Brinkerink, Hector Olivares, Freek Roelofs Editors: Sara Issaoun, Raquel Fraga Encinas, RU EHT Group, Polarimetry Working Group, and Outreach Working Group Narrator: Nicola Barber Animation: Fiks Film Animation Director: Nelis Claassen Funded with support from the European Research Council, Radboud University Nijmegen, and Goethe University Frankfurt. Realised under the auspices of the Event Horizon Telescope.
3D animations explaining circularly polarized, linearly polarized, and unpolarized electromagnetic waves.
EHT’s Polarized View of the Quasar Jet Images of NRAO 530 were obtained by the EHT Collaboration using several different imaging methods with the quasar core located toward the bottom-left part of the image, and the jet extending upwards (north). The contours show the structure in total (solid black) and polarized (dotted) light; dashes represent the direction of the observed polarization (Courtesy: EVPA).
Quasar 3C 273, 2003 in an HST image. (Credit: NASA/J.Bahcall(IAS))
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Full podcast episodes: Support: Follow: Follow: on twitter Follow:on Facebook Watch on YouTube: Go on an adventure: What powers a quasar? Just how strong is a blazar? What’s the connection to giant black holes? I discuss these questions and more in today’s Ask a Spaceman! Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G., Matthew K., Kevin O., Justin R., Chris C., Helge B., Tim R., Nick T., Lars H., Ray S., John F., , Anilavadhanula, Mark R., and David B.! Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars
Centaurus A is a giant elliptical active galaxy 12 million light years away. Radio and X-ray images reveal features associated with jets emanating from near the galaxy's central supermassive black hole, which has a mass of 55 million suns. Now, the TANAMI project has provided the best-ever view of these jets. In the radio image of the galaxy's core, the black hole is invisible but the jets show in great detail. Features as small as 15 light-days across can be resolved. The powerful jets feed vast lobes of radio-emitting gas that reach far beyond the visible galaxy. This video is public domain and can be downloaded at: If you liked this video, subscribe to the NASA Goddard YouTube channel: Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: Follow NASA’s Goddard Space Flight Center · Instagram · Twitter NASA GODDARD · Twitter NASA GODDARD PICTURES · Facebook: · Flickr
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