[ExI] ligo does it again
spike66 at att.net
Thu Sep 28 16:02:19 UTC 2017
From: extropy-chat [mailto:extropy-chat-bounces at lists.extropy.org] On Behalf Of John Clark
Sent: Thursday, September 28, 2017 7:16 AM
To: ExI chat list <extropy-chat at lists.extropy.org>
Subject: Re: [ExI] ligo does it again
On Wed, Sep 27, 2017 at 9:19 PM, spike <spike66 at att.net <mailto:spike66 at att.net> > wrote:
ASTONISHING! Hanford LIGO just announced the detection of the 4th black hole merger:
How can there be so many of these? John?
>…And how can they be so big?
I have been going nuts trying to figure that one out too. There couldn’t have been stars that size to start with I wouldn’t think, or if so, my notion of star formation is completely wrong. I have been trying to get up to speed on Eddington Limit to see where my notion went wrong.
>…Nobody predicted that, just a few years ago people were saying if LIGO found anything (and some said they wouldn't)…
I do confess I was one of the naysayers. Now I am going back and rethinking my paltry understanding of General Relativity and star formation. When I read the proposal for LIGO a bunch of years ago, I would have estimated the chances of even a single detection in my lifetime about a percent. Now we have four events in two years and even that is an understatement: the instruments are offline much of that time.
And that 20-40 solar masses range is just mind-boggling.
>… “With the next observing run planned for Fall 2018 we can expect such detections weekly or even more often.” That would be really cool! John K Clark
Ja, but even then… what if they do? How the hell can there be so many of these mergers this far down the road? I don’t trust anything I thought I knew on the topic. I am going to apply to my college for a refund.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the extropy-chat