I'm grateful the image didn't originate with that Kelly astronut. ;)
Posted on 02/18/2016 10:44:57 AM PST by LibWhacker
A new photograph of galaxy NGC 4889 may look peaceful from such a great distance, but it’s actually home to one of the biggest black holes that astronomers have ever identified. The Hubble Space Telescope allowed scientists to capture photos of the galaxy, located in the Coma Cluster about 300 million light-years away. The supermassive black hole hidden away in NGC 4889 breaks all kinds of records, even though it is currently classified as dormant.
So how big is it, exactly? Well, according to our best estimates, the supermassive black hole is roughly 21 billion times the size of the Sun, and its event horizon (an area so dense and powerful that light can’t escape its gravity) measures 130 billion kilometers in diameter. That’s about 15 times the diameter of Neptune’s orbit around the Sun, according to scientists at the Hubble Space Telescope. At one point, the black hole was fueling itself on a process called hot accretion. Space stuff like gases, dust, and galactic debris fell towards the black hole and created an accretion disk. Then that spinning disk of space junk, accelerated by the strong gravitational pull of the largest known black hole, emitted huge jets of energy out into the galaxy.
Related: Scientists just saw light coming from around a black hole for the first time
During that active period, NGC 4889 would have classified as a quasar (quasi-stellar radio source) thanks to the black hole’s emissions of up to a thousand times more energy than our Milky Way galaxy. But the black hole is now in dormant mode because there isn’t any more sustenance stored in the orbiting accretion disk. “The accretion disk sustained the supermassive black hole’s appetite until the nearby supply of galactic material was exhausted. Now, napping quietly as it waits for its next celestial snack, the supermassive black hole is dormantâ€, says the Hubble Space Telescope website.
Of course, the announcement posted with new photos of the NGC 4889 galaxy is quick to point out that the pictures don’t exactly capture the likeness of the supermassive black hole. It is impossible to observe a black hole directly, but scientists have been able to identify the implied presence of a black hole by analyzing the way celestial objects interact with some invisible force. For this particular black hole in the NGC 4889 galaxy, scientists used instruments on the Keck II Observatory and the Gemini North Telescope to measure the velocity of stars moving around the center point of the galaxy. The stars’ specific velocities re what allowed scientists to calculate the incredible size of NGC 4889’s black hole.
LOL!
Accretion disc bump!
A teaspoon of black hole matter would weigh same as a full supertanker on earth
Light being captured or trapped by black holes is typical
michelle or barry
If we are to believe the theorists, the mass of the entire 21 billion suns would fit on that teaspoon!
*ping* (if you haven’t already seen it)
Thanks fieldmarshaldj, extra to APoD!
I'm grateful the image didn't originate with that Kelly astronut. ;)
Are they going to call it “The Wookie”?
Or, God willing, the morgue...
It’s a Caldwell object, so, it will be on my list for this Spring.
I’ve seen it before, doesn’t look anything like the picture.
:D
-PJ
“their reliance on “dark matter†shows they are missing some important elements to the equations altogether.”
Thank you!
Thanks fieldmarshaldj. A couple of catch-up pings. [blush]
WTF?
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