Yeah, I was a friend of friend of Bob Forward and I once had dinner with him. At the time though he was pushing anti-matter powered spaceships; which I thought was a crank idea.

Brent

On 6/16/2016 5:18 AM, Hans Moravec wrote:
On Jun 15, 2016, at 23:48 , Brent Meeker <meeke...@verizon.net> wrote:

When you look somewhere new, you see new things.  To bad Joe Weber didn't live 
to see this.

Brent
And Bob Forward (Robert L. Forward), who was once Weber's grad student, and 
continued gravity related research and publication until his death in 2002.

On 6/15/2016 7:25 PM, John Clark wrote:
After analyzing the data from LIGO's brief engineering run the scientists there 
just announced they have found a second Black Hole merger. A Black Hole of 14 
solar masses merged with one of 8 solar masses and produced a Black Hole of 21 
solar masses and gravitational waves with 1 solar mass of energy. It happened 
1.4 billion light years away, about the same distance as the first merger that 
was announced a few months ago, but the signal was weaker because the Black 
Holes involved were smaller (14 and 8 vs 36 and 29) and also because the orbit 
of the Black Holes was more edge on relative to the Earth. Edge on means the 
signal is weaker but it also means it's easier to determine the spin, so unlike 
the first detection this time we can say with certainty that at least one of 
the Black Holes was spinning. And although weaker the signal lasted longer, 
almost a full second versus a fifth of a second the first time because being 
smaller the holes generated waves with higher frequencies that LIGO is more 
sensitive to.

And they're looking at at least one other suspected merger but they're only 85% 
certain it's real and that's not good enough to claim discovery, but there may 
be others so there may be a third announcement before long. Not bad for 
observing for only 18 days. The instrument was running at only one third power 
but that was still good enough to determine that 2 mirrors 4 kilometers apart 
had changed their distance by less than a billionth of a nanometer. I can't 
wait for September when the 2 LIGOs get back online and are joined by a third 
detector, VIRGO in Italy.

http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.241103

  John K Clark
--
You received this message because you are subscribed to the Google Groups 
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at https://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups 
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at https://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/d/optout.


--
You received this message because you are subscribed to the Google Groups 
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at https://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/d/optout.

Reply via email to