Photographing our own black hole

Feb 8, 2011
21,354
471
83
Vancouver Island, B.C. Canada
#21
Three more links on this ...

https://www.mnn.com/earth-matters/space/blogs/first-image-black-hole-almost-here

https://interestingengineering.com/...round-supermassive-black-hole-at-galaxys-core

https://medium.com/starts-with-a-ba...nt-have-an-image-of-a-black-hole-192ea94f97b7


While physicist astronomers are gathering data to get the first megapixel photograph of a black hole in our galaxy, here on Earth we are gravitationally adjusting our tonearm azimuth and cartridge tracking perfectly in sync with the music rotating @ the perfect pitch and speed.

This is not an April's first joke.
 
Last edited:

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#22
The announcement will be streamed live on April 10 at 9am EDT here
 

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#23
Another livestream site next Wednesday at https://www.nsf.gov/news/special_reports/blackholes/

NSF press conference on first result from Event Horizon Telescope project

A global network of telescopes has been working to capture the first ever image of a black hole. On April 10 at 9 a.m. EDT, the National Science Foundation will hold a press conference to announce a groundbreaking result.
 
Feb 8, 2011
21,354
471
83
Vancouver Island, B.C. Canada
#27
Last edited:

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#30
The black hole of the M87 galaxy in the Virgo cluster

Screen Shot 2019-04-10 at 9.08.03 AM.png
 
Last edited:
Likes: NorthStar

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#31
 

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#32
Sagittarius A*'s black hole will be next. A monumental day for astrophysics
 

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#33
“This black hole is much bigger than the orbit of Neptune, and Neptune takes 200 years to go around the sun,” Geoffrey Crew, research scientist MIT’s Haystack Observatory said in a statement. “With the M87 black hole being so massive, an orbiting planet would go around it within a week and be traveling at close to the speed of light.”
 
Feb 8, 2011
21,354
471
83
Vancouver Island, B.C. Canada
#34
It is amazing that we now have a picture (photograph) of a black hole.
You need a super good "zoom" camera lens (telescopes x 8 around the Earth) to take a snapshot of something that is over 26,000 light-years away, and another 55 million light years away!

http://www.astronomy.com/news/2019/04/how-to-take-a-picture-of-a-black-hole

There is "a lot" of data and mathematics and adjustments and calculations and analysis behind this extremely complex task.

That final photo (ring of fire), reminds me of a solar eclipse, the ring from The Lord of the Rings (movie trilogy).
___

https://www.nationalgeographic.com/...led-m87-event-horizon-telescope-astrophysics/

❇ Slideshow:
https://www.nationalgeographic.com/...-astrophysics/#/01-black-hole-a-consensus.jpg
 
Last edited:

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#35
100 years later, it is proven yet again how brilliant Einstein was:

Because the disc is rotating, it appears brighter where it is moving towards us, and dimmer where it is moving away. This effect was predicted by Einstein's theory of general relativity.

The image isn't high-enough resolution at this point to measure the rotation speed, but the EHT team, who watched the object for four days, could tell that it's rotating in a clockwise direction.

The image isn't super clear, so there are some effects that we may not be able to see - such as a relativistic effect called frame-dragging, which happens when the black hole is spinning. As it spins, because its gravity is so intense, it drags spacetime with it.

"That's been understood as an effect of general relativity for a very long time, but it only gets measurably large if you're really close to the event horizon of a black hole," theoretical astrophysicist Philip Hopkins of Caltech, who wasn't involved with the research, told ScienceAlert.

"Being able to image anything astrophysically at this kind of resolution is kind of mind-blowing."

There's another direct image that the EHT collaboration is currently working on, of Sagittarius A*, the black hole at the centre of the Milky Way - and it should be ready soon, according to the announcement we heard today.


Chandra X-ray Observatory close-up of the core of the M87 galaxy. (NASA/CXC/Villanova University/J. Neilsen)
 
Feb 8, 2011
21,354
471
83
Vancouver Island, B.C. Canada
#36
When things get "shaky" on Earth it seems that's when man makes the biggest space science discoveries? Maybe not. Anyway it's a good thing that those two black holes are far far away.
_____

Yes, Einstein was right once again ...

 
Last edited:

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#37
Fascinating press conference by the NSF

 

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#38
A documentary will be broadcast on April 12th at 9pm EDT on the Smithsonian channel
 

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#39
Another fascinating video of the people behind it

 

ack

VIP/Donor & WBF Founding Member
May 6, 2010
5,536
194
63
Boston, MA
#40
And the longer version

 

About us

  • What’s Best Forum is THE forum for high end audio, product reviews, advice and sharing experiences on the best of everything else. A place where audiophiles and audio companies discuss existing and new audio products, music servers, music streamers and computer audio, digital to audio convertors (DACS), turntables, phono stages, cartridges, reel to reel, speakers, headphones, tube amplifiers and solid state amplification. Founded in 2010 What's Best Forum invites intelligent and courteous people of all interests and backgrounds to describe and discuss the best of everything. From beginners to life-long hobbyists to industry professionals we enjoy learning about new things and meeting new people and participating in spirited debates.

Quick Navigation

User Menu

Steve Williams
Site Founder | Site Owner | Administrator
Ron Resnick
Site Co-Owner | Administrator
Julian (The Fixer)
Website Build | Marketing Managersing