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This artwork shows two massive black holes in the OJ 287 galaxy. The smaller black hole orbits the larger one, which remains stationary and is surrounded by a disk of gas. When the smaller black hole crashes through the disk, it produces a flare brighter than 1 trillion stars. But the smaller black hole's orbit is elongated and moving relative to the disk, causing the flares to occur irregularly. Image credit: NASA/JPL-Caltech/R. Hurt (IPAC)
This far-off blue planet may look like a friendly haven – but don’t be deceived! Weather here is deadly. The planet’s cobalt blue color comes from a hazy, blow-torched atmosphere containing clouds laced with glass. Howling winds send the storming glass sideways at 5,400 mph (2km/s), whipping all in a sickening spiral. It’s death by a million cuts on this slasher planet! Credit: NASA-JPL/Caltech
The star map in celestial coordinates, at five different resolutions.
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The universe’s stars lead dramatic lives. From birth to death, these burning spheres of gas experience some of the most extreme conditions our cosmos has to offer. A star’s life cycle depends on how much mass it has. Scientists typically place stars two categories: low-mass 🔅 and high-mass 🔆. Low-mass stars, like our Sun, quietly burn hydrogen into helium for most of their lives, but then puff out into huge red giants before dying and becoming a beautiful planetary nebula. High-mass stars, on the other hand, are much more massive than our Sun and end their lives in huge explosions called supernovae, ending up as neutron stars or black holes. Learn about the lives, times, and deaths of stars here: https://tmblr.co/Zz_UqjYyCW2q0i00
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In 2018, Event Horizon Telescope released an image of the shadow of M87’s central black hole. 🕳️ Scientists have been studying this giant elliptical galaxy for a long time, in part due to its legendary jet extending nearly 5,000 light-years from the galaxy’s center. https://go.nasa.gov/2RDTFeT
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Most known black holes come in two main sizes: star-sized and super-sized. The closest supermassive one lies at the center of our Milky Way galaxy, about 26,000 light-years away. 🌌 Called Sagittarius A*, it weighs in at about 4 million Suns. ☀️ https://go.nasa.gov/3iyABdH
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Ever dreamed of traveling nearly as fast as light? Zipping across the universe to check out the sights seems like it could be fun, right? Not so fast! 🛑

Before you jump into your rocket, we have a few tips to help you navigate the universe at such high speeds, where, depending on your point of view, time runs slower and distances shrink. 🤯

🎬 Watch this video to learn more.

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Want to know even more? Check out this Tumblr: https://nasa.tumblr.com/…/bend-your-mind-with-special-relat…

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NASA's Guide to Near-light-speed Travel.mp4
Publicado por NASA Universe
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Astronomers have caught a fireworks show from the dance of two supermassive black holes at the center of a galaxy about 5 billion light-years away. 🎆

At the center of galaxy OJ 287 is a monster black hole weighing in with a mass of about 18 billion Suns accompanied by a smaller 150-million-Sun companion. As they orbit the smaller black hole plunges through the swirling disk of gas and dust around the larger black hole, causing bright X-ray flares that can last weeks.

Astron...omers predicted this plunge would also cause secondary “after-flares” that could come months later. Earlier this year, our Swift and NuSTAR satellites, along with ESA’s XMM-Newton, observed an after-flare from these binary black holes for the first time.

Learn more: https://www.nustar.caltech.edu/news/119

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This artwork shows two massive black holes in the OJ 287 galaxy. The smaller black hole orbits the larger one, which remains stationary and is surrounded by a disk of gas. When the smaller black hole crashes through the disk, it produces a flare brighter than 1 trillion stars. But the smaller black hole's orbit is elongated and moving relative to the disk, causing the flares to occur irregularly. Image credit: NASA/JPL-Caltech/R. Hurt (IPAC)
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