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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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