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The first stars
https://popastro.com/forum/viewtopic.php?f=5&t=20657
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Author:  brian livesey [ Fri Mar 02, 2018 11:07 am ]
Post subject:  The first stars

Researchers at the Massachusetts Institute of Technology and Arizona State University claim to have detected radio signals from the first stars, that formed almost 14 billion years ago ( the journal "Nature" ).
Following on from the Big Bang, when all was dark with primordial hydrogen, it took only about 180 million years for the first stars to appear in the Universe.The stars are nine billion years older than the Sun.
To detect the signals from the ancient stars, researchers used a radio spectrometer at the Murchison Radio-astronomy Obersvatory in Western Australia. "It is unlikely that we'll be able to see any earlier into the history of stars in our lifetimes," said project leader Judd Bowman of Arizona State University.
The research has found that the primordial hydrogen gas and the early universe as a whole, must have been twice as cold than previously estimated, putting it at around -234 C.

Author:  RMSteele [ Fri Mar 02, 2018 11:17 am ]
Post subject:  Re: The first stars

.....Just like Leeds, then? Bob :roll:

Author:  brian livesey [ Sat Mar 03, 2018 10:23 am ]
Post subject:  Re: The first stars

I'm wearing six layers outdoors, but I'm still fffffffreezing!

Author:  David Frydman [ Sat Mar 03, 2018 10:46 am ]
Post subject:  Re: The first stars

Hi Brian,
6 layers should be good for minus 30C.
I suppose the type of material is important.
Acclimatisation and age are important.

Twice as cold, maybe -468C?

I haven't been out for 4 days.
Old and cold.
Interesting fox tracks in the snow.
We have regular fox visits very often.
Also bird footprints, very regular spacing.
Only a robin and herring gulls this morning.
I don't suppose the birds are doing well here.

Regards,
David

Author:  brian livesey [ Sat Mar 03, 2018 10:58 am ]
Post subject:  Re: The first stars

Some of us David, are old enough to remember the winter of '47, when snow was up to the gas lamps and coal was still rationed ( I'm giving my age away now. :lol: ).
Seventy years on and there's never been another winter quite like it. It was a "Canadian" winter.

Author:  David Frydman [ Sat Mar 03, 2018 4:39 pm ]
Post subject:  Re: The first stars

I spent the winter of 1963 pulling cars out of snowdrifts with an open back SWB Land Rover when I worked as a trainee mechanic in Sunderland.
It did a few mph in low ratio.
It was painted bright yellow.

My Mini disappeared for several weeks in the car park of the central main cinema.

Some drifts were 10ft deep and further west up to 30ft.

I used to collect coke for the garage heating from the local gasworks.
When I went in they weighed the Land Rover with me in it.

I filled it with help I think with maybe 7 cwt of coke then went back to the weighbridge.

I went in to pay.
The difference was the weight of coke.

When I got back I realised that I got my weight in coke free.
When I went in they weighed the Land Rover and me.
When I went out I was in the office paying for the coke and they weighed the Land Rover sans me.

Pity I wasn't fatter.

I suppose I should have told the gasworks, but garage ethics weren't great.
Just because they couldn't add up or take away, I thought why should I tell them.
This went on through the whole winter.

Maybe now I am older I would think differently.

Regards,
David

Author:  brian livesey [ Mon Mar 05, 2018 11:22 am ]
Post subject:  Re: The first stars

There was general national disruption in the winter of '47. Power stations were overloaded and some were closed down, causing frequent power cuts.
Yes, '63 was a bad 'n, but it wasn't a '47er nor a '41er ( the one that brought Barbarossa to a grinding halt ).

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