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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        The New York Times        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://www.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 hole        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.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

 

 

 

 

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/black-hole-picture.html

 

 

 

 

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

 

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

 

 

 

 

 

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

 

 

 

 

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

 

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

 

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

 

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

 

 

 

 

 

 

 

 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.

 

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

 

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

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

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