Re: First Picture If A Black Hole

2019-04-11 Thread Lawrence Crowell
I don't know why I got millions reduced to thousands and billions to millions. I looked up the mass of M87 BH and I find 2.5 billion solar masses. LC On Wednesday, April 10, 2019 at 7:12:13 PM UTC-5, John Clark wrote: > > > > On Wed, Apr 10, 2019 at 7:46 PM Lawrence Crowell > wrote: > >

Re: First Picture If A Black Hole

2019-04-11 Thread John Clark
On Thu, Apr 11, 2019 at 5:40 AM Lawrence Crowell < goldenfieldquaterni...@gmail.com> wrote: *> I looked up the mass of M87 BH and I find 2.5 billion solar masses.* > I believe that figure was from an old measurement, M87's Black Hole is now thought to be 6.6*10^9 solar masses +- 0.4. THE BLACK

Re: First Picture If A Black Hole

2019-04-11 Thread Tomasz Rola
On Thu, Apr 11, 2019 at 09:34:54AM -0700, Philip Thrift wrote: > [...] > (About the foot note, not the black hole.) > > > Unix indeed has the Buddha nature. > > Microsoft has made available Windows Subsystem for Linux (WSL). > - https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux > >

Re: Questions about the Equivalence Principle (EP) and GR

2019-04-11 Thread agrayson2000
On Thursday, April 11, 2019 at 7:12:17 PM UTC-6, Brent wrote: > > > > On 4/11/2019 4:53 PM, agrays...@gmail.com wrote: > > > > On Thursday, April 11, 2019 at 4:37:39 PM UTC-6, Brent wrote: >> >> >> >> On 4/11/2019 1:58 PM, agrays...@gmail.com wrote: >> >> >>> He might have been referring

Re: Questions about the Equivalence Principle (EP) and GR

2019-04-11 Thread 'Brent Meeker' via Everything List
On 4/11/2019 9:33 PM, agrayson2...@gmail.com wrote: On Thursday, April 11, 2019 at 7:12:17 PM UTC-6, Brent wrote: On 4/11/2019 4:53 PM, agrays...@gmail.com wrote: On Thursday, April 11, 2019 at 4:37:39 PM UTC-6, Brent wrote: On 4/11/2019 1:58 PM, agrays...@gmail.com

Re: First Picture If A Black Hole

2019-04-11 Thread Philip Thrift
On Wednesday, April 10, 2019 at 6:55:55 PM UTC-5, Tomasz Rola wrote: > > On Wed, Apr 10, 2019 at 09:32:32AM -0400, John Clark wrote: > > https://www.nytimes.com/2019/04/10/science/black-hole-picture.html > > > > Also, here: > > https://www.eso.org/public/news/eso1907/ > > -- > Regards, >

Re: Questions about the Equivalence Principle (EP) and GR

2019-04-11 Thread agrayson2000
On Tuesday, April 9, 2019 at 11:09:36 PM UTC-6, Brent wrote: > > > > On 4/9/2019 6:52 PM, agrays...@gmail.com wrote: > > > > On Tuesday, April 9, 2019 at 6:41:52 PM UTC-6, Brent wrote: >> >> >> >> On 4/9/2019 5:20 PM, agrays...@gmail.com wrote: >> >> >> >> On Tuesday, April 9, 2019 at 2:40:16

Re: Questions about the Equivalence Principle (EP) and GR

2019-04-11 Thread 'Brent Meeker' via Everything List
On 4/11/2019 1:58 PM, agrayson2...@gmail.com wrote: He might have been referring to a transformation to a tangent space where the metric tensor is diagonalized and its derivative at that point in spacetime is zero. Does this make any sense? Sort of. Yeah, that's what

Re: Questions about the Equivalence Principle (EP) and GR

2019-04-11 Thread agrayson2000
On Thursday, April 11, 2019 at 4:37:39 PM UTC-6, Brent wrote: > > > > On 4/11/2019 1:58 PM, agrays...@gmail.com wrote: > > >>> >> He might have been referring to a transformation to a tangent space where >> the metric tensor is diagonalized and its derivative at that point in >> spacetime is

Re: Questions about the Equivalence Principle (EP) and GR

2019-04-11 Thread 'Brent Meeker' via Everything List
On 4/11/2019 4:53 PM, agrayson2...@gmail.com wrote: On Thursday, April 11, 2019 at 4:37:39 PM UTC-6, Brent wrote: On 4/11/2019 1:58 PM, agrays...@gmail.com wrote: He might have been referring to a transformation to a tangent space where the metric tensor is