Written and produced by Lars LeonhardWatch this video on the NASA Goddard YouTube channel.Complete transcript available. The black holes themselves are shown larger than in reality using spheres scaled to reflect their masses.Credit: NASA's Goddard Space Flight Center and Scientific Visualization StudioMusic: "Event Horizon" from Gravity. The largest disk shown, belonging to a binary called GRS 1915, spans a distance greater than that separating Mercury from our Sun. The accretion disks use a different color scheme because they sport even higher temperatures than the stars. In others, like the famous system called Cygnus X-1, the star produces a hefty outflow that is partly swept up by the black hole’s gravity to form the disk. In most of these systems, a stream of matter from the star forms an accretion disk around the black hole. Star colors ranging from blue-white to reddish represent temperatures from 5 times hotter to 45% cooler than our Sun. The view of each system reflects how we see it from Earth. This visualization presents 22 X-ray binary systems that host confirmed black holes at the same scale, with their orbits sped up by about 22,000 times. Learn more about the best-known black hole systems in our galaxy and its neighbor, the Large Magellanic Cloud. Credit: NASA's Goddard Space Flight Center Conceptual Image LabMusic: "In the Stars" from Universal Production MusicWatch this video on the NASA Goddard YouTube channel.Complete transcript available. Scientists think all of these objects shine most intensely in ultraviolet light. Smaller black holes are shown in bluish colors because their gas is expected to be hotter than that orbiting larger ones. Only one of these colossal objects resides in our own galaxy, and it lies 26,000 light-years away. The black holes shown, which range from 100,000 to more than 60 billion times our Sun’s mass, are scaled according to the sizes of their shadows – a circular zone about twice the size of their event horizons. Watch this video to see how they compare to each other and to our solar system.
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