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It's #BlackFriday, but for us, it's the 2nd annual #BlackHoleFriday. Today, we'll post pics & info about black holes. Do black holes come in size medium? Black holes can be petite, with masses only about 10 times that of our sun -- or monstrous, boasting the equivalent in mass up to 10 billion suns. Do black holes also come in size medium? NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, is busy scrutinizing a class of black holes that may fall into the proposed medium-sized category. The largest black holes, referred to as supermassive, dominate the hearts of galaxies. The immense gravity of these black holes drags material toward them, forcing the material to heat up and release powerful X-rays. Small black holes dot the rest of the galactic landscape. They form under the crush of collapsing, dying stars bigger than our sun. Evidence for medium-sized black holes lying somewhere between these two extremes might come from objects called ultraluminous X-ray sources, or ULXs. These are pairs of objects in which a black hole ravenously feeds off a normal star. The feeding process is somewhat similar to what happens around supermassive black holes, but isn't as big and messy. In addition, ULXs are located throughout galaxies, not at the cores. In this image, the magenta spots show two black holes in the spiral galaxy called NGC 1313, or the Topsy Turvy galaxy. Both black holes belong to a class called ultraluminous X-ray sources, or ULXs. The magenta X-ray data come from NuSTAR, and are overlaid on a visible image from the Digitized Sky Survey. Image credit: NASA/JPL-Caltech/IRAP; -
It's #BlackFriday, but for us, it's the 2nd annual #BlackHoleFriday. Today, we'll post pics & info about black holes. Not the right #BlackFriday shopping weather? In this artist's illustration, turbulent winds of gas swirl around a black hole. Some of the gas is spiraling inward toward the black hole, but another part is blown away. A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars. Artwork Credit: NASA, and M. Weiss (Chandra X -ray Center); -
It's #BlackFriday, but for us, it's the 2nd annual #BlackHoleFriday. Today, we'll post pics & info about black holes. Tired from shopping? Maybe it's time to devour some snacks. Here's a black hole snacking on a star. On March 28, 2011, NASA's Swift detected intense X-ray flares thought to be caused by a black hole devouring a star. In one model, illustrated here, a sun-like star on an eccentric orbit plunges too close to its galaxy's central black hole. About half of the star's mass feeds an accretion disk around the black hole, which in turn powers a particle jet that beams radiation toward Earth. Video credit: NASA/Goddard Space Flight Center/CI Lab; -
It's #BlackFriday, but for us, it's the 2nd annual #BlackHoleFriday. Today, we'll post pics & info about black holes. Here's a 2 for 1 special showing two black holes merging into one. A black hole is a massive object whose gravitational field is so intense that no light (electromagnetic radiation) can escape it. When two orbiting black holes merge, a massive amount of energy is released in the form of jets. Meanwhile, the movement of these massive bodies disturbs the fabric of space-time around them, sending ripples of gravitational waves radiating outward. These waves are predicted by Einstein's theory of general relativity, but have yet to be directly detected. In this video, we see a closer look at the center of a spiral galaxy reveals a pair of black holes locked in a death spiral. When they merge, the massive amount of energy is released in the form of jets. Credit: NASA; -
It's #BlackFriday, but for us, it's the second annual #BlackHoleFriday. Today, we'll post pics & info about black holes. What Is a Black Hole? A black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape. The strong gravity occurs because matter has been pressed into a tiny space. This compression can take place at the end of a star's life. Some black holes are a result of dying stars. Because no light can escape, black holes are invisible. However, space telescopes with special instruments can help find black holes. They can observe the behavior of material and stars that are very close to black holes. Pictured here is an artist's drawing a black hole named Cygnus X-1. It formed when a large star caved in. This black hole pulls matter from blue star beside it. Image Credit: NASA/CXC/M.Weiss #NASA #Space #Blackhole #blackholes;
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Circling Saturn: Saturn is circled by its rings (seen nearly edge-on in this image), as well as by the moons Tethys (the large bright body near the lower right hand corner of this image) and Mimas (seen as a slight crescent against Saturn's disk above the rings, at about 4 o'clock). The shadows of the rings, each ringlet delicately recorded across Saturn's face, also circle around Saturn's south pole. Although the rings and larger moons of Saturn mostly orbit very near the planet's equatorial plane, this image shows that they do not all lie precisely in the orbital plane. Part of the reason that Mimas (246 miles, or 396 kilometers across) and Tethys (660 miles, or 1062 kilometers across) appear above and below the ring plane because their orbits are slightly inclined (about 1 to 1.5 degrees) relative to the rings. Credit: NASA/JPL-Caltech/Space Science Institute #nasa #space #saturn #cassini #moons #tethys #mimas #solarsystem #astronomy #science 6269E672-78E5-41E3-A30D-B08074F37E21; -
Supercomputer Simulation of Magnetic Field Loops on the Sun: Magnetic fields emerging from below the surface of the sun influence the solar wind—a stream of particles that blows continuously from the sun’s atmosphere through the solar system. Our researchers and university partners are using high-fidelity computer simulations to learn how these magnetic fields emerge, heat the sun’s outer atmosphere and produce sunspots and flares. This visualization shows magnetic field loops in a portion of the sun, with colors representing magnetic field strength from weak (blue) to strong (red). Image Credit: Robert Stein, Michigan State University; Timothy Sandstrom, NASA/Ames #nasa #computer #sun #solarwind #sunspot #supercomputer #solarsystem #science; -
Moon Transiting the Sun: The moon partially obscured the view of the sun from our Solar Dynamics Observatory, or SDO, on Nov. 22, 2014. This lunar transit was visible only from SDO's point of view. Image Credit: NASA/SDO #nasa #space #sun #sdo #moon #transit #science; -
Europa's Stunning Surface: The puzzling, fascinating surface of Jupiter’s icy moon Europa looms large in this newly-reprocessed color view, made from images taken by NASA's Galileo spacecraft in the late 1990s. This is the color view of Europa from Galileo that shows the largest portion of the moon's surface at the highest resolution. The view was previously released as a mosaic with lower resolution and strongly enhanced color. To create this new version, the images were assembled into a realistic color view of the surface that approximates how Europa would appear to the human eye. The scene shows the stunning diversity of Europa’s surface geology. Long, linear cracks and ridges crisscross the surface, interrupted by regions of disrupted terrain where the surface ice crust has been broken up and re-frozen into new patterns. Image Credit: NASA/JPL-Caltech/SETI Institute #nasa #space #europa #jupiter #galileo #science #moon #ice; -
And liftoff! The Soyuz TMA-15M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Monday, Nov. 24, 2014, carrying Expedition 42 Soyuz Commander Anton Shkaplerov of the Russian Federal Space Agency (Roscosmos), Flight Engineer Terry Virts of NASA, and Flight Engineer Samantha Cristoforetti of the European Space Agency (ESA) into orbit to begin their five and a half month mission on the International Space Station. Photo Credit: NASA/Aubrey Gemignani #exp42 #iss #spacestation #space #nasa #launch #roscosmos #soyuz;
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Mixing Paints: Nature is an artist, and this time she seems to have let her paints swirl together a bit. What the viewer might perceive to be Saturn's surface is really just the tops of its uppermost cloud layers. Everything we see is the result of fluid dynamics. Astronomers study Saturn's cloud dynamics in part to test and improve our understanding of fluid flows. Hopefully, what we learn will be useful for understanding our own atmosphere and that of other planetary bodies. This view looks toward the sunlit side of the rings from about 25 degrees above the ringplane. The image was taken in red light with the Cassini spacecraft narrow-angle camera on Aug. 23, 2014. Credit: NASA/JPL-Caltech/Space Science Institute #nasa #space #saturn #planets #solarsystem #cassini #astronomy #science; -
Temperatures are dropping, the leaves are falling, and the countdown is on to the busiest time of year for air travel around the nation. The industry association Airlines for America predicts 24.6 million passengers will take off to visit friends and family during the upcoming Thanksgiving holiday weekend, up 1.5 percent from 2013. Sunday, Nov. 30, will be the busiest day of the year at U.S. airports. Even if you won’t be taking to the sky anytime soon, it’s a good bet something you're using today– your cell phone, flat-screen TV – or the holiday gifts you're buying online arrived as part of the billions of tons of cargo shipped on airplanes every year in the U.S. The holidays reinforce how much we rely on aviation. And thanks to advancements in aeronautics developed by NASA, today’s aviation industry is better equipped than ever to safely and efficiently transport all those passengers and packages to their destinations. Streamlined aircraft bodies, quieter jet engines, techniques for preventing icing, drag-reducing winglets, lightweight composite structures, and so much more are an everyday part of flying thanks to NASA research that traces its origins back to the earliest days of aviation. It’s the same story for the U.S. air traffic control system. Computer software tools produced by NASA to help reduce congestion from gate to gate, on the airport tarmac and along the highways in the sky, are in place at Federal Aviation Administration facilities all over the country. Learn more at http://www.nasa.gov/aero #flyNASA #thanksgiving #planes #flying #NASAaero #aviation #avgeek; -
Hubble Sees a Spiral in a Furnace: This Hubble image is a snapshot of NGC 986 — a barred spiral galaxy discovered in 1828 by James Dunlop. NGC 986 is found in the constellation of Fornax (The Furnace), located in the southern sky. NGC 986 is a bright, 11th-magnitude galaxy sitting around 56 million light-years away, and its golden center and barred swirling arms are clearly visible in this image. Barred spiral galaxies are spiral galaxies with a central bar-shaped structure composed of stars. NGC 986 has the characteristic S-shaped structure of this type of galactic morphology. Young blue stars can be seen dotted amongst the galaxy’s arms and the core of the galaxy is also aglow with star formation. To the top right of this image the stars appear a little fuzzy. This is because a gap in the Hubble data was filled in with data from ground-based telescopes. Although the view we see in this filled in patch is accurate, the resolution of the stars is no match for Hubble’s clear depiction of the spiral galaxy. Credit: NASA/ESA #nasa #space #astronomy #hst #telescope #galaxy #esa #science; -
Rocket Roll! The Soyuz TMA-15M spacecraft is rolled out to the launch pad by train on Friday, Nov. 21, 2014, at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket is scheduled for Nov. 24 and will carry Expedition 42 Soyuz Commander Anton Shkaplerov of the Russian Federal Space Agency (Roscosmos), Flight Engineer Terry Virts of NASA , and Flight Engineer Samantha Cristoforetti of the European Space Agency into orbit to begin their five and a half month mission on the International Space Station. Image Credit: NASA/Aubrey Gemignani #nasa #space #spacestation #iss #isscrew #roscosmos #soyuz #launch #exp42; -
ThrowbackThursday: First Hubble Servicing Mission Astronaut Story Musgrave, anchored on the end of the Remote Manipulator System arm, prepares to be elevated to the top of the Hubble Space Telescope to install protective covers on the magnetometers. Astronaut Jeffrey Hoffman inside payload bay, assisted Musgrave with final servicing tasks on the telescope, wrapping up five days of spacewalks in December 1993. Image Credit: NASA #NASA #History #Hubble25 #Spacewalk #TBT #Throwbackthursday;
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