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1 Sizes of Black Holes? How Big is a Black Hole?
https://skyandtelescope.org/astronomy-resources/how-big-is-a-black-hole/
Stellar-mass black holes are typically in the range of 10 to 100 solar masses, while the supermassive black holes at the centers of galaxies can ...
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2 How much space does a black hole take up? | Astronomy.com
https://astronomy.com/news/2020/04/how-much-space-does-a-black-hole-take-up
The black hole in GRO J1655-40 is estimated to weigh about 5.4 times the mass of the Sun, which would give it a radius of about 10 miles. By ...
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3 How big is a black hole? - Cool Cosmos - Caltech
https://coolcosmos.ipac.caltech.edu/ask/232-How-big-is-a-black-hole-
Black holes come in many sizes and their size depends on how much material is in them (their mass). Some are the remains of a giant star which collapsed.
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4 How small can a black hole be, and what is the average size ...
https://www.quora.com/How-small-can-a-black-hole-be-and-what-is-the-average-size-of-a-black-hole-relative-to-our-sun
In theory, a black hole can be as light as the Planck mass, or about 0.02 milligrams. However, the only known process for black holes to form, stellar collapse, ...
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5 How Big Are Black Holes According To NASA - Screen Rant
https://screenrant.com/black-holes-size-how-big/
The general theory of relativity says that there is no limit to the size of a black hole. They can be as small as an atom or billions of miles ...
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6 Black Hole Size Comparison Chart Gives New View of Universe
https://nerdist.com/article/biggest-black-holes-size-comparison/
The comparison then ascends up through black holes around the size of the one that keeps V723 Mon, a star 24 times the mass of the Sun, in orbit ...
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7 This animation shows just how big supermassive black holes ...
https://www.businessinsider.com/black-hole-how-big-largest-universe-2019-5
So we have to look at one of the most massive of all supermassive black holes. It has a diameter of about 78 billion miles. For perspective, ...
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8 Black hole - Wikipedia
https://en.wikipedia.org/wiki/Black_hole
As of 2021, the nearest known body thought to be a black hole is around 1,500 light-years (460 parsecs) away (see list of nearest black holes). Though only a ...
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9 Astronomers Reveal First Image of the Black Hole at the Heart ...
https://eventhorizontelescope.org/blog/astronomers-reveal-first-image-black-hole-heart-our-galaxy
Because the black hole is about 27,000 light-years away from Earth, it appears to us to have about the same size in the sky as a donut on ...
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10 Black Hole Primer - Chandra X-ray Observatory
https://chandra.harvard.edu/blackhole/
Objects can orbit a black hole without any serious consequences as long as the size of their orbit is much greater than the diameter of the event horizon of a ...
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11 What is the average size of a black hole? - Study.com
https://homework.study.com/explanation/what-is-the-average-size-of-a-black-hole.html
Most black holes tend to be around 10-100 solar masses, although supermassive black holes can be much larger, with potentially many billions of solar masses ...
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12 general relativity - What is the physical size of a black hole?
https://physics.stackexchange.com/questions/39090/what-is-the-physical-size-of-a-black-hole
Only the outgoing light rays are frozen. So the real size of any black hole is 0, as stated in the first answer. Of course this does not take ...
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13 The Baffling Simplicity of Black Holes | Discover Magazine
https://www.discovermagazine.com/the-sciences/the-baffling-simplicity-of-black-holes
A black hole with the mass of the sun has a diameter of about 6 kilometers, or 4 miles. Want to know the diameter of the black hole at the ...
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14 Estimating the Size and Mass of a Black Hole
https://chandra.si.edu/edu/formal/math/7Page81.pdf
From this better- estimate, about what is the mass of the black hole GRB110328A in solar masses? Space Math http://spacemath.gsfc.nasa.gov. Page ...
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15 Black Hole | COSMOS
https://astronomy.swin.edu.au/cosmos/b/black+hole
In theory, any mass can be compressed sufficiently to form a black hole. The only requirement is that its physical size is less than the Schwarzschild radius.
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16 Structure of a Black Hole
http://blackholes.stardate.org/resources/article-structure-of-a-black-hole.html
Although black holes come in a variety of masses and sizes, ... In a "normal" star, like the Sun, the inward pull of gravity is balanced by the outward ...
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17 Here's How Big the M87 Black Hole Is Compared to the Earth
https://futurism.com/the-byte/big-m87-black-hole-compared-the-earth
Stellar Giant. The gigantic black hole, not counting the giant rings of trapped light orbiting it, is about 23.6 billion miles (38 billion kilometers) across, ...
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18 Black hole at the centre of our Galaxy imaged for the first time
https://www.nature.com/articles/d41586-022-01320-y
The two black holes have roughly the same apparent size in the ... The source turned out to be unusually dim, dimmer than an average star.
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19 1st image of supermassive black hole at the center of Milky ...
https://www.cnn.com/2022/05/12/world/milky-way-center-black-hole-image-scn/index.html
The black hole is about 27,000 light-years away from Earth. Our solar system is located in one of the spiral arms of the Milky Way galaxy, which ...
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20 Black holes have a size limit of 50 billion suns | New Scientist
https://www.newscientist.com/article/dn28647-black-holes-have-a-size-limit-of-50-billion-suns/
Even gluttons can't eat forever. When black holes at the hearts of galaxies swell to 50 billion times the mass of our sun, they may lose the ...
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21 Frequently Asked Questions About Black Holes
https://www1.phys.vt.edu/~jhs/faq/blackholes.html
There is no limit to how large a black hole can be. However, the largest blackholes we think are in existence are at the centers of many galaxies, and have ...
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22 Black Holes and Neutron Stars - UMd-Astronomy
https://www.astro.umd.edu/~miller/poster1.html
Unlike ordinary things (e.g., rocks), which have a size roughly proportional to the cube root of their mass, black holes have radii proportional to their mass.
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23 Calculating the size of a black hole Post-16
https://www.rmg.co.uk/file/2320/download?token=uL-sllC7
Black holes exist in a broad range of sizes and masses, from stellar mass ... (equatorial) radius of the Earth is 6378 km and its average density is 5.5.
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24 What are black holes? - EarthSky
https://earthsky.org/space/definition-what-are-black-holes/
Black holes are regions of space with gravitational fields so strong that nothing, not even light, can escape. Their sizes vary from stellar ...
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25 What If (Tiny) Black Holes Are Everywhere? - YouTube
https://www.youtube.com/watch?v=srVKjWn26AQ
PBS Space Time
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26 Did the Milky Way lose its black hole? - Big Think
https://bigthink.com/starts-with-a-bang/milky-way-lose-black-hole/
At four million solar masses, the Milky Way's supermassive black hole is quite small for a galaxy its size. Did we lose the original?
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27 Black Holes - National Geographic Kids
https://kids.nationalgeographic.com/space/article/black-holes
Most black holes, regardless of their size, are born when a giant star ... a black hole up close, he'd see the hands on his watch ticking at normal speed.
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28 Black Holes: Gravity's Relentless Pull interactive
https://www.stsci.edu/~marel/black_holes/encyc_mod3_q14.html
And the mass of the black hole in the center of the nearby Andromeda galaxy has been calculated by measuring the average speeds of all the stars that orbit ...
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29 M87 | Black Hole, Distance, & Facts - Encyclopedia Britannica
https://www.britannica.com/place/Virgo-A
Supermassive black holes have been detected in other galaxies as well. In 2017 the Event Horizon Telescope obtained an image of the supermassive ...
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30 Density of Black Holes - Chemistry LibreTexts
https://chem.libretexts.org/Ancillary_Materials/Exemplars_and_Case_Studies/Exemplars/Physics_and_Astronomy/Density_of_Black_Holes
A black hole contains about 3.7M (3.7 million) solar masses (a solar mass is 1.98892 × 1033 grams) and is assumed to be a sphere with a ...
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31 Do Black Holes Increase In Size? (Explained!)
https://scopethegalaxy.com/do-black-holes-increase-in-size/
While the black hole at the center of the Sombrero Galaxy has consistently swallowed one solar mass for every 20 years of its existence (currently topping a ...
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32 Black Holes: X-Rays and Sizes - University of Iowa Physics
http://homepage.physics.uiowa.edu/~pkaaret/s09/L21_imbh.pdf
Black Holes: X-Rays and Sizes. • X-rays. • Black hole masses. • X-ray sources in other galaxies. • Beaming. • A nebula around a black hole ...
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33 UGS 303: History of Black Holes - University of Texas at Austin
https://www.as.utexas.edu/~gebhardt/u303f16/bh1.html
We need to distinguish between normal black holes and supermassive black ... it takes light to travel across it---this determines the size of the quasar.
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34 Ask Ethan: What Does A Black Hole's Size Tell Us? - Forbes
https://www.forbes.com/sites/startswithabang/2021/04/30/ask-ethan-what-does-a-black-holes-size-tell-us/
But that ring isn't the size of the event horizon; rather, due to some of the more intricate effects of General Relativity, it's about 250% as ...
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35 How are black holes studied? - National Science Foundation
https://beta.nsf.gov/blackholes/how-are-black-holes-studied
Two black holes colliding and resulting gravitational waves ... The image of the Sgr A* black hole is an average of the different images that the EHT ...
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36 Under the observed average density, the size of Universe ...
https://www.researchgate.net/figure/Under-the-observed-average-density-the-size-of-Universe-Black-Hole-and-Zero-Energy-Zone_fig3_359192496
Under the observed average density, the size of Universe Black Hole and ...
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37 Universe Has 40 Quintillion Black Holes Says Study That ...
https://www.newsweek.com/how-many-black-holes-are-there-universe-40-billion-1670812
Speaking to Newsweek, study co-author Lumen Boco said the 40 quintillion figure was gained by calculating the average number of black holes ...
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38 A new breakthrough may reveal how black holes influenced ...
https://www.inverse.com/science/a-new-way-to-measure-black-holes
Timescales are measured in the average time it takes for the disc to reach equilibrium. ... Black holes typically come in three sizes:.
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39 The size of the largest known black hole : r/woahdude - Reddit
https://www.reddit.com/r/woahdude/comments/gqkaem/the_size_of_the_largest_known_black_hole/
Some black holes are large because big stars turn into black holes. Or they may have gotten lucky and been in a position to capture a lot of ...
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40 Ringing of the Cosmic Bells: A Search for Black Hole Vibrations
https://www.ligo.org/science/Publication-S5S6RD/index.php
We are most sensitive to perturbed black holes with total masses in the range 100 to 150 solar masses resulting from two merging IMBHs with equal masses. The ...
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41 Explainer: black holes - The Conversation
https://theconversation.com/explainer-black-holes-7431
Is the average density of the universe so high that light and everything else around us could never escape? The answer appears to be “no”. The ...
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42 The Hitch-Hiker's Guide to Black Holes.
https://www.astro.keele.ac.uk/workx/blackholes/index3.html
If though a star with an equivalent mass to the Earth were to collapse into a black hole, the space that all of the matter would take up would have a radius of ...
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43 Black hole truths, myths and mysteries - Curious
https://www.science.org.au/curious/space-time/black-holes
Black holes are bizarre, but not everything you hear about them is true. ... If a star is average or small in size (like our sun), ...
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44 Astronomers reveal first image of the black hole at the heart of ...
https://www.eso.org/public/news/eso2208-eht-mw/
“We were stunned by how well the size of the ring agreed with ... The image of the Sgr A* black hole is an average of the different images ...
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45 The Density of Matter in a Black Hole
https://public.nrao.edu/ask/the-density-of-matter-in-a-black-hole/
Taking the event horizon of a black hole as the definition of its outer boundary, the event horizon of a nonrotating black hole the mass of our Sun would have a ...
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46 'Stupendously large' black holes could grow to truly monstrous ...
https://www.space.com/black-holes-can-reach-stupendously-large-sizes.html
How big might black holes get? A team of scientists now suggests black holes could reach what they call "stupendously large" sizes, each ...
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47 Supermassive Black Hole Found in Unlikely Cosmic Backwater
https://www.scientificamerican.com/article/supermassive-black-hole-found-in-unlikely-cosmic-backwater/
... belongs to an average-size galaxy group, and the monster black holes discovered to date tend to be found in dense clusters of galaxies.
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48 Black Holes
http://spiff.rit.edu/classes/phys301/lectures/black_hole/black_hole.html
Q: What is the escape velocity from the Earth? The answer. What happens if an object's mass is really big, but its size is really small? That will make the ...
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49 Black Holes - Hyperphysics
http://hyperphysics.phy-astr.gsu.edu/hbase/Astro/blkhol.html
One of the terms used with black holes is "photon sphere", the radius of the orbit of light around the black hole. For 3 solar masses this radius is 13.5 km, 3/ ...
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50 Black hole - McGill School Of Computer Science
https://www.cs.mcgill.ca/~rwest/wikispeedia/wpcd/wp/b/Black_hole.htm
Theoretically, a black hole can be any size. Astrophysicists expect to find black holes with masses ranging between roughly the mass of the Sun ...
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51 Black Holes - NMSU Astronomy
http://astronomy.nmsu.edu/geas/lectures/lecture26/slide03.html
How massive must a star be to become a black hole rather than a neutron star? ... normal star will evolve off the Main Sequence and expand in size to a red ...
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52 What is the density of a black hole? (Advanced)
http://curious.astro.cornell.edu/86-the-universe/black-holes-and-quasars/general-questions/423-what-is-the-density-of-a-black-hole-advanced
You can use the Schwarzschild radius to calculate the "density" of the black hole - i.e., the mass divided by the volume enclosed within the ...
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53 Woo & Urry, AGN Black Hole Masses and Luminosities
https://iopscience.iop.org/article/10.1086/342878/fulltext/56144.text.html
these methods assume that AGN hosts are normal galaxies. We compare 36 cases for which ... Black Hole Mass Estimates Using the BLR Size-Luminosity Relation.
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54 Explainer: What are black holes? - Science News for Students
https://www.snexplores.org/article/explainer-what-are-black-holes
And they aren't just massive, but also dense. Density is a measure of how tightly mass is packed into a space. Imagine a black hole the size of ...
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55 U-M scientist part of group to reveal first image of the black ...
https://news.umich.edu/u-m-scientist-part-of-group-to-reveal-first-image-of-the-black-hole-at-the-heart-of-our-galaxy/
The image of the Sgr A* black hole is an average of the different images ... “We were stunned by how well the size of the ring agreed with ...
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56 Examining the supermassive black hole in our galaxy - Phys.org
https://phys.org/news/2022-06-supermassive-black-hole-galaxy.html
The very idea that a black hole could have a temperature strains the ... to the mass of the black hole and the size of the event horizon.
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57 Black Holes | Brilliant Math & Science Wiki
https://brilliant.org/wiki/black-hole/
A black hole is a region of spacetime in which the attractive force of gravity is so strong that not even light escapes. As a result, black holes are not ...
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58 Black hole shadow with soft hairs | SpringerLink
https://link.springer.com/article/10.1007/JHEP09(2022)117
... may change the average size and position of the shadow. Images resulting from soft hair black holes with surrounding accretion flows are ...
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59 Black Holes - University of Pittsburgh
https://sites.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/black_holes/index.html
If we tip it away from its normal upright position sufficiently far, ... The formula for the size rbh of a Newtonian black hole is easy to compute.
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60 Black Hole Paradoxes Reveal a Fundamental Link Between ...
https://www.quantamagazine.org/black-hole-paradoxes-reveal-a-fundamental-link-between-energy-and-order-20200528/
By chewing on the problems posed by “extremal” black holes, ... Together, the black hole's mass and charge determine its size — the radius ...
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61 The first image of the black hole at the heart of our galaxy ...
https://www.universityofcalifornia.edu/news/first-image-black-hole-heart-our-galaxy-revealed
The image of the Sgr A* black hole is an average of the different images ... “We were stunned by how well the size of the ring agreed with ...
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62 How Big is the biggest Black Hole we know of? – Astronotes
https://armaghplanet.com/how-big-is-the-biggest-black-hole-we-known-of.html
In fact, it has been hypothesised that all galaxies contain a massive black hole at their centre, with a relationship between the size of the ...
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63 Primordial Black Holes as Dark Matter: Recent Developments
https://www.annualreviews.org/doi/10.1146/annurev-nucl-050520-125911
where x ≡ L/s is the ratio of the string length to the correlation scale. ... Neither black holes nor neutron stars are expected to form through normal ...
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64 How Big Can a Black Hole Get? - Videos - Seeker
https://www.seeker.com/videos/space-innovation/how-big-can-a-black-hole-get
› ... › Exploration
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65 The first image of the event horizon of a black hole - Syfy
https://www.syfy.com/syfy-wire/the-first-image-of-the-event-horizon-of-a-black-hole
The size of the event horizon depends on the mass of the black hole. If you do the math — first calculated by Einstein in the early 1900s ...
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66 [2008.08588] Measuring Supermassive Black Hole Spin in the ...
https://arxiv.org/abs/2008.08588
... we measure the average black hole spin parameter a=0.62~\substack{+0.07 \\ -0.17}. The sample size, availability of multiwavelength data ...
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67 Astronomers spot 'missing link' black hole - New York Post
https://nypost.com/2020/04/03/astronomers-spot-missing-link-black-hole-not-too-big-and-not-too-small/
The supermassive black hole at the center of the Milky Way is 4 million times the mass of the sun and located 26,000 light years from Earth. The ...
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68 Supermassive Black Holes Are More Common Than We ...
https://www.popsci.com/supermassive-black-holes-are-more-common-than-we-thought/
Super massive black holes have a mass over 10 billion times ... quite a few galaxies the size of NGC 1600 that reside in average-size galaxy ...
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69 SUPERMASSIVE BLACK HOLES - @theU
https://attheu.utah.edu/facultystaff/supermassive-black-holes/
“It's pretty amazing when you really think about it. These ultra-compact dwarfs are around 0.1 percent the size of the Milky Way, yet they host ...
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70 Supermassive Black Holes May Be More Common Than ...
https://www.npr.org/sections/thetwo-way/2016/04/06/473091314/supermassive-black-holes-may-be-more-common-than-anyone-imagined
The newly discovered black hole is about 17 billion times more massive than our sun. Another black hole is currently listed in the Guinness ...
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71 information - UCR Math Department
https://math.ucr.edu/home/baez/information.html
bits. The information goes up as the square of the mass, so now the amount of information is huge. But the black hole would still be small: its ...
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72 A guide to living at a black hole | Ars Technica
https://arstechnica.com/science/2021/06/a-guide-to-living-at-a-black-hole/
Black holes flood the Universe. The nearest one is a mere 1,500 lightyears away. A giant one, Sagittarius A*, sits in the center of the ...
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73 Is Everything Made of Mini Black Holes? - Universe Today
https://www.universetoday.com/30865/is-everything-made-of-mini-black-holes/
Black holes lose energy and shrink in size as they do so, ... the strong interaction becomes weaker and the average interaction lengths ...
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74 Astronomers Have Found a Star That Survived ... - ScienceAlert
https://www.sciencealert.com/this-black-hole-s-weirdly-regular-feeding-schedule-is-because-it-s-snacking-on-a-star
The black hole is the nucleus of a galaxy called GSN 069, and it's pretty lightweight as far as supermassive black holes go - only 400,000 times ...
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75 UArizona astronomers lead efforts that reveal the black hole at ...
https://news.arizona.edu/story/uarizona-astronomers-lead-efforts-reveal-black-hole-heart-our-galaxy
Because the black hole is about 27,000 light-years away from Earth, it appears to us to have about the same size in the sky as a donut on ...
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76 Astronomers reveal first image of the black ... - UChicago News
https://news.uchicago.edu/story/astronomers-reveal-first-image-black-hole-heart-our-galaxy
Because the black hole is about 27,000 light-years away from Earth, it appears to us to have about the same size in the sky as a donut on ...
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77 Sagittarius A*: The inside story of how the Milky Way's black ...
https://english.elpais.com/science-tech/2022-05-13/sagittarius-a-the-inside-story-of-how-our-black-hole-was-snapped.html
The ring of light in the EHT image is exactly 52 microarcseconds in size (about the size of a donut on the Moon), in perfect agreement with ...
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78 A New Breakthrough Transformed Our Understanding of Black ...
https://interestingengineering.com/science/breakthrough-transformed-our-understanding-of-black-holes
A conceptual image of a black hole. ... For black holes, size matters. ... The average time it takes for each accretion disc to achieve ...
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79 Ginormous Black Hole Discovered In The 'Cosmic Backwaters'
https://www.cbsnews.com/sanfrancisco/news/ginormous-black-hole-discovered-in-the-cosmic-backwaters-of-our-universe/
"There are quite a few galaxies the size of NGC 1600 that reside in average-size galaxy groups," says Ma. "We estimate that these smaller groups ...
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80 What is a Black Hole? - AstroCamp
https://astrocamp.org/blog/black-hole/
To think of it another way, if a hydrogen atom were the size of our planet, the proton would be just over a tenth of a mile wide, the electron ...
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81 Primordial black holes could hold the key to dark matter ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9371677/
“You would start with a pretty massive primordial black hole in the early universe, perhaps 10,000 solar masses,” and then this black hole would ...
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82 Here's Why Small Black Holes Are More Dangerous Than Big ...
https://gizmodo.com/heres-why-small-black-holes-are-more-dangerous-than-big-1681979641
If you were going to travel close to a black hole in order to ... hole's average density will drop and drop as its mass and size increase.
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83 The Early Universe - Primordial Black Holes
https://www.whillyard.com/science-pages/p-b-h.html
Let us say the Schwarzschild radius of the black hole is around the Planck Length - 1.6 x 10-33 cm. The average spacing of atoms in a solid is between 2 x ...
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84 Astronomers capture 1st image of Milky Way's huge black hole
https://www.latimes.com/science/story/2022-05-12/astronomers-capture-first-image-milky-way-galaxy-black-hole
This is the first image ever made of Sagittarius A*, the supermassive black hole at the center of the Milky Way. It's the first direct ...
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85 Astronomers reveal first image of the black ... - ScienceDaily
https://www.sciencedaily.com/releases/2022/05/220512094206.htm
Because the black hole is about 27 000 light-years away from Earth, it appears to us to have about the same size in the sky as a doughnut on ...
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86 Giant Black Holes and the Fate of the Universe
https://www.encyclopedia.com/science/technology-magazines/giant-black-holes-and-fate-universe
First, it is important to determine just how massive a black hole must be to qualify as a giant. The standard stellar black holes that scientists believe exist ...
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87 Black hole Sagittarius A* imaged for the first time
https://cosmosmagazine.com/space/sagittarius-a-black-hole-image-nasa/
A size comparison of the two black holes imaged by EHT. M87* is 6.5 billion times the mass of our Sun and located in the heart of galaxy Messier ...
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88 Useful Notes / Black Holes - TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/UsefulNotes/BlackHoles
For astrophysics, this is more than sufficient to get a ballpark estimate of the size of any black hole based on the mass it contains. Thus, a black hole with a ...
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89 The Largest Black Hole In the Known Universe | by Ethan Siegel
https://medium.com/starts-with-a-bang/the-largest-black-hole-in-the-known-universe-67b792a1d856
This is a galaxy that extends for 2 million light-years away from its central core in its largest direction, many times the size of Messier 87 ...
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90 Scientists Find Gigantic Black Hole Way Out in the Cosmic ...
https://www.nbcnews.com/tech/tech-news/scientists-find-gigantic-black-hole-way-out-cosmic-backwater-n551881
That's a surprise, because NGC 1600, which lies 200 million light-years from Earth in the constellation Eridanus, belongs to an average-size ...
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91 Stunning Reveal: First Image of the Black Hole at the Center of ...
https://scitechdaily.com/stunning-reveal-first-image-of-the-black-hole-at-the-center-of-our-milky-way-galaxy/
Because the black hole is about 27,000 light-years away from Earth, it appears to us to have about the same size in the sky as a doughnut on ...
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92 Is a primordial black hole lurking in our Solar System?
https://www.sciencefocus.com/space/primordial-black-holes/
All of your internal organs will become distorted as the black hole warps the very fabric of space in which they reside. It would lead to an ...
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93 Astronomers Reveal First Image of Black Hole at the Heart of ...
https://today.ttu.edu/posts/2022/05/Stories/Astronomers-Reveal-First-Image-of-Black-Hole-at-the-Heart-of-Our-Galaxy
The image of the Sgr A* black hole is an average of the different images ... “We were stunned by how well the size of the ring agreed with ...
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94 The Principles and Laws of Black Hole Universe
https://www.scirp.org/journal/paperinformation.aspx?paperid=86704
When the black hole merges with other black holes, the growth rate should vary and be much larger in average than that when the black hole accretes its ambient ...
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95 Ten things you don't know about black holes
https://slate.com/technology/2008/10/ten-things-you-don-t-know-about-black-holes.html
That would give it a density of roughly 1/1000 of a gram per cc… and that's the density of air! A billion solar mass black hole would have an ...
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