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Vocapedia > Space > Cosmos > Galaxies > Black holes

 

 

 

 

European Southern Observatory (ESO)

This video starts by showing a wide-field view of a region of the sky

in the constellation of Telescopium.

It then zooms in to show HR 6819,

a triple system with two stars visible to the naked eye and a black hole,

the closest ever found to Earth.

 

YouTube

https://www.youtube.com/watch?v=ilGY0lvRplY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Black Hole Hunters        NYT        13 June 2015

 

 

 

 

Black Hole Hunters        Video        Out There | The New York Times        The New York Times        13 June 2015

 

Astronomers hope the Event Horizon Telescope,

a synchronized network of radio antennas as large as the Earth,

will take the first ever picture of a black hole,

an abyss so deep no light can escape.

 

Produced by:

Dennis Overbye, Jonathan Corum and Jason Drakeford

Read the story here: http://nyti.ms/1FSyaai

Watch more videos at: http://nytimes.com/video

 

YouTube

https://www.youtube.com/watch?v=CrQCK8IFZ4U

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The first image image of a black hole,

taken by the Event Horizon Telescope

and released to the world last April.

 

“The image of a black hole

actually contains a nested series of rings,”

said Michael Johnson

of the Harvard-Smithsonian Center for Astrophysics.

 

Photograph:

Event Horizon Telescope Collaboration

 

Infinite Visions Were Hiding in the First Black Hole Image’s Rings

Scientists proposed a technique

that would allow us to see more of the unseeable.

NYT

March 28, 2020    5:00 a.m. ET

https://www.nytimes.com/2020/03/28/
science/black-hole-rings.html

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

An illustration of the supermassive black hole

located in the middle of the very dense galaxy M60-UCD1.

 

It weighs as much

as 21 million times the mass of our Sun.

 

Lying about 50 million light-years away,

M60-UCD1 is a tiny galaxy

with a diameter of 300 light-years

just 1/500th of the diameter of the Milky Way!

 

Despite its size it is pretty crowded,

containing some 140 million stars.

 

Because no light can escape from the black hole,

it appears simply in silhouette

against the starry background.

 

The black holes intense gravitational field

warps the light of the background stars

to form ring-like images just outside the dark edges

of the black holes event horizon.

 

(Combined observations

by the NASA/ESA Hubble Space Telescope

and NASAs Gemini North telescope

determined the presence

of the black hole inside M60-UCD1.)

 

Boston Globe > Big Picture

Images from NASA        September 19, 2014

http://archive.boston.com/bigpicture/2014/09/
images_from_nasa.html

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

quasar > active black hole        USA

 

http://www.npr.org/blogs/thetwo-way/2015/02/26/
389250817/astronomers-discover-a-supermassive-black-hole-dating-to-cosmic-dawn

 

http://www.usatoday.com/tech/science/space/2007-10-10-
cosmic-origins_N.htm

 

 

 

 

 

 

 

black holes        UK / USA

 

Don't let the name fool you:

a black hole is anything but empty space.

 

Rather,

it is a great amount of matter

packed into a very small area

- think of a star ten times

more massive than the Sun

squeezed into a sphere

approximately the diameter

of New York City.

 

The result is a gravitational field

so strong that nothing,

not even light, can escape.

https://science.nasa.gov/astrophysics/focus-areas/black-holes/

 

 

 

dense gravitational region

that sucks in everything

around it

 

https://science.nasa.gov/astrophysics/focus-areas/black-holes/

http://www.nytimes.com/interactive/2015/06/08/
science/space/guide-to-black-holes.html

https://www.nytimes.com/2019/04/10/
science/what-is-black-hole.html

 

 

2022

 

https://www.npr.org/2022/05/28/
1101763397/black-hole-sound-nasa

 

https://www.nytimes.com/2022/05/12/
science/black-hole-photo.html

 

 

 

 

2021

 

https://www.nytimes.com/2021/06/29/
science/black-holes.html

 

https://www.npr.org/2021/06/29/
1011047410/city-sized-neutron-star-massive-black-hole-collide-gulps-universe-gravitational

 

https://www.theguardian.com/film/2021/may/26/
stranger-than-anything-dreamed-up-by-sci-fi-will-we-ever-understand-black-holes

 

https://www.nytimes.com/2021/04/22/
science/black-holes-astrophysics-names.html

 

https://www.npr.org/2021/03/24/
980896706/stunning-new-image-of-black-hole-reveals-surrounding-magnetic-fields

 

https://www.nytimes.com/2021/02/26
/science/astronomy-black-hole-ngc6397.html

 

https://www.nytimes.com/2021/02/18/
science/cygnus-black-hole-astronomy.html

 

 

 

 

2020

 

https://www.npr.org/2020/10/06/
920647525/3-scientists-awarded-nobel-prize-in-physics-for-discoveries-related-to-black-hol

 

https://www.nytimes.com/2020/10/01/
science/astronomy-galaxies-black-hole.html

 

https://www.nytimes.com/2020/09/11/
science/astronomy-planet-nine-black-hole.html

 

https://www.nytimes.com/2020/09/02/
science/black-hole-astronomy-physics.html

 

https://www.nytimes.com/2020/06/25/
science/black-hole-collision-ligo.html

 

https://www.nytimes.com/2020/06/24/
science/black-hole-ligo-gravitational.html

 

https://www.nytimes.com/2020/06/05/
science/black-hole-astronomy.html

 

https://www.nytimes.com/2020/05/14/
science/black-hole-astronomy-meerkat.html

 

https://www.npr.org/2020/05/06/
851246887/scientists-find-nearest-known-black-hole-in-distressingly-fitting-metaphor

 

https://www.nytimes.com/2020/04/16/
science/black-hole-sagittarius-a.html

 

https://www.nytimes.com/2020/03/28/
science/black-hole-rings.html

 

https://www.nytimes.com/2020/03/06/
science/black-hole-cosmos-astrophysics.html

 

 

 

 

2019

 

https://www.npr.org/2019/04/10/
711723383/watch-earth-gets-its-first-look-at-a-black-hole

 

https://www.nytimes.com/2019/04/10/
science/what-is-black-hole.html

 

https://www.nytimes.com/2019/04/10/
science/black-hole-picture.html

 

 

 

 

2018

 

https://www.npr.org/sections/thetwo-way/2018/01/12/
577563812/researchers-spot-massive-black-hole-in-double-burp

 

https://www.nytimes.com/2018/06/14/
science/black-holes-stars-arp-299.html

 

https://www.npr.org/sections/13.7/2018/01/17/
578610216/black-holes-where-reality-beats-fiction

 

 

 

 

2017

 

https://www.npr.org/sections/thetwo-way/2017/12/06/
568819600/massive-black-hole-reveals-when-the-first-stars-blinked-on

 

https://www.theguardian.com/science/2017/feb/26/
black-hole-telescope-big-as-earth-event-horizon-project-sagittarius-a

 

 

 

 

 

2016

 

http://www.nytimes.com/2016/06/16/
science/black-hole-questions-answers.html

 

http://www.npr.org/sections/thetwo-way/2016/06/15/
481934630/gravitational-waves-from-colliding-black-holes-shake-scientists-detectors-again

 

https://www.theguardian.com/science/2016/jun/08/
supermassive-black-hole-eating-gas-clouds-astronomy-chile

 

http://www.nytimes.com/2016/06/07/
science/stephen-hawking-black-holes.html

 

http://www.nytimes.com/2016/02/22/
science/a-black-hole-that-has-stopped-swallowing-stars.html

 

http://www.npr.org/sections/thetwo-way/2016/02/11/
466286219/in-milestone-scientists-detect-waves-in-space-time-as-black-holes-collide

 

http://www.npr.org/sections/13.7/2016/02/11/
466372736/growing-old-with-einstein-the-long-wait-for-detection-of-gravitational-waves

 

 

 

 

2015

 

http://www.theguardian.com/science/video/2015/oct/22/
star-enters-a-black-hole-nasa-video-animation

 

http://www.nytimes.com/2015/09/22/
science/space/more-evidence-for-coming-black-hole-collision.html

 

http://www.npr.org/sections/thetwo-way/2015/08/25/
434627348/stephen-hawking-black-holes-are-not-the-eternal-prisons-we-once-thought

 

http://www.nytimes.com/2015/08/22/
science/space/jacob-bekenstein-physicist-who-revolutionized-theory-of-black-holes-dies-at-68.html

 

http://www.npr.org/blogs/thetwo-way/2015/02/26/
389250817/astronomers-discover-a-supermassive-black-hole-dating-to-cosmic-dawn

 

http://www.theguardian.com/science/2015/feb/26/
found-a-black-hole-12-billion-times-the-size-of-the-sun

 

http://www.npr.org/sections/thetwo-way/2015/01/28/
382178361/charles-townes-laser-inventor-black-hole-discoverer-dies-at-99

 

 

 

 

2014

 

http://www.npr.org/sections/13.7/2014/12/17/
371410194/black-holes-and-our-cosmic-future

 

http://www.npr.org/sections/13.7/2014/02/05/
272004778/do-black-holes-exist

 

 

 

 

2011

 

http://www.nytimes.com/2011/12/06/
science/space/astronomers-find-biggest-black-holes-yet.html

 

 

 

 

2007

 

http://www.usatoday.com/tech/science/space/2007-10-10-
cosmic-origins_N.htm

 

http://www.usatoday.com/tech/science/space/2007-09-22-
blackholes_N.htm

 

http://www.usatoday.com/tech/science/space/2007-05-21-
black-hole-weight_N.htm

 

 

 

 

 

 

 

black holes in the Milky Way galaxy > Cygnus X-1        USA

 

Cygnus X-1,

an unseen, X-ray-emitting object,

and a fat blue star called HDE 226868

circle each other every 5.6 days.

 

Cygnus X-1

was one of the earliest celestial

sources of X-rays ever discovered, in 1964,

when astronomers began

lofting cosmic Geiger counters into space,

and one of the first to be considered

as a possible black hole.

 

The X-rays are produced

by gas that is heated to millions of degrees

as it swirls around the cosmic drain.

 

With a mass originally estimated

at 15 times that of the sun,

Cygnus X-1 is one of the most massive

and most luminous of the X-ray binary systems

known in the Milky Way.
 

 

New measurements

have now raised that figure

to 21 solar masses.

 

The makeover does not change

the overall perception of the cosmos;

Cygnus X-1 is still a black hole,

an almost science-fictional manifestation

of Einsteinian weirdness in celestial reality.

 

But the details of

how Cygnus X-1 became a black hole

are now in doubt.

 

https://www.nytimes.com/2021/02/18/
science/cygnus-black-hole-astronomy.html

 

 

 

 

 

 

 

2261 galaxy > cluster > Abell 2261 > black hole        USA

 

It is about 2.7 billion light-years from here,

in the constellation Hercules

in the northern sky,

not far from the prominent star Vega.

 

Using the standard rule of thumb,

the black hole missing

from the center of the 2261 galaxy

should be 10 billion solar masses or more,

comparable to the mightiest

of these monsters known to astronomers.

 

The black hole

at the center of the Milky Way galaxy

is only about four million solar masses.

 

So where has nature stashed

the equivalent of 10 billion suns?

 

One possibility is

that the black hole is there but has gone silent,

having temporarily run out of anything to eat.

 

But another provocative possibility,

Dr. Lauer and his colleagues say,

is that the black hole was thrown

out of the galaxy altogether.

https://www.nytimes.com/2021/01/19/
science/astronomy-black-hole-abell.html

 

 

https://www.nytimes.com/2021/01/19/
science/astronomy-black-hole-abell.html

 

 

 

 

 

 

 

constellation Ophiuchus > black hole MAXI J1820+070

 

The star in question

is actually two stars:

 

a black hole, a gravitational pit,

about eight times as massive as the sun;

and a smaller star,

with half the mass of the sun,

that the black hole is feeding on.

 

The black hole

first came to notice in March 2018

when it underwent

an outburst that was detected

by the All-Sky Automated

Survey for Supernovae,

or ASAS-SN,

a network of 24 robotic telescopes,

located around the world

and run by Ohio State University,

that is ever on the lookout

for strange things in the sky.

 

Black holes

are often the corpses of stars

that have died and collapsed.

 

They are so dense

that not even light can escape them,

according to Albert Einstein’s

general theory of relativity.

 

As a result,

they are one-way passages to eternity

for anything that enters.

 

But they are sloppy, slow eaters;

matter falling into a black hole must first traverse

a hot doughnut of doom

that swirls around the edge of the hole

like water circling a drain.

 

Pressures and magnetic fields in this hellish region

can squeeze some of the super-energized matter

outward  in mighty jets.
 

https://www.nytimes.com/2020/06/05/
science/black-hole-astronomy.html

 

 

 

 

 

 

 

constellation of Telescopium

 

HR 6819, a triple system

with two stars visible to the naked eye

and a black hole,

the closest ever found to Earth.

https://www.youtube.com/watch?v=ilGY0lvRplY

 

https://www.youtube.com/watch?v=ilGY0lvRplY

 

https://www.npr.org/2020/05/06/
851246887/scientists-find-nearest-known-black-hole-in-distressingly-fitting-metaphor

 

 

 

 

 

 

 

massive black hole

at the center of galaxy Messier 87 (M87)        USA

 

https://www.npr.org/2019/04/10/
711723383/watch-earth-gets-its-first-look-at-a-black-hole

 

 

 

 

 

 

 

supermassive black hole        UK / USA

 

Astronomers

have found evidence of such black holes

at the heart of most large galaxies,

including our own Milky Way.

https://www.npr.org/sections/thetwo-way/2018/01/12/
577563812/researchers-spot-massive-black-hole-in-double-burp

 

 

https://www.npr.org/sections/thetwo-way/2018/01/12/
577563812/researchers-spot-massive-black-hole-in-double-burp

 

https://www.theguardian.com/science/2016/jun/08/
supermassive-black-hole-eating-gas-clouds-astronomy-chile

https://www.npr.org/sections/thetwo-way/2016/04/06/
473091314/supermassive-black-holes-may-be-more-common-than-anyone-imagined

 

http://www.npr.org/sections/thetwo-way/2015/02/26/
389250817/astronomers-discover-a-supermassive-black-hole-dating-to-cosmic-dawn

 

 

 

 

 

 

 

supermassive black hole Sagittarius A*,

the pothole in eternity

at the center of the Milky Way galaxy.        USA

 

https://www.nytimes.com/2020/04/16/
science/black-hole-sagittarius-a.html

 

https://www.nytimes.com/video/science/
100000006142535/circling-a-black-hole.html

 

 

 

 

 

 

 

WISEA J171227.81-232210.7

— a black hole

several billion times as massive as our sun        USA

 

https://www.nytimes.com/2020/03/06/
science/black-hole-cosmos-astrophysics.html

 

 

 

 

 

 

 

swallow        USA

 

https://www.npr.org/2021/06/29/
1011047410/city-sized-neutron-star-massive-black-hole-collide-gulps-universe-gravitational

 

 

 

 

 

 

 

gobble        USA

 

https://www.npr.org/2021/06/29/
1011047410/city-sized-neutron-star-massive-black-hole-collide-gulps-universe-gravitational

 

 

 

 

 

 

 

blazars        USA

 

intensely bright galaxies

harboring a black hole at the center.

 

https://www.npr.org/2018/07/12/
628142995/a-4-billion-light-year-journey-ends-at-the-south-pole

 

 

 

 

 

 

 

force

 

 

 

 

 

 

 

mutual gravitational pull

 

 

 

 

 

 

 

gravity

 

 

 

 

 

 

 

zero gravity

 

 

 

 

 

 

 

magnetic fields        USA

 

https://www.npr.org/2021/03/24/
980896706/stunning-new-image-of-black-hole-reveals-surrounding-magnetic-fields

 

 

 

 

 

 

 

 

 

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