Scientists show off the wide vision of Europe's Euclid space telescope
https://arstechnica.com/space/2023/11/scientists-show-off-the-wide-vision-of-europes-euclid-space-telescope/
The $1.5 billion Euclid telescope will use light to study the dark Universe.

Very nice pictures!

On 09/11/2023 04:49, Jan Panteltje wrote:
> Scientists show off the wide vision of Europe's Euclid space telescope
> https://arstechnica.com/space/2023/11/scientists-show-off-the-wide-vision-of-europes-euclid-space-telescope/
> The $1.5 billion Euclid telescope will use light to study the dark Universe.
>
> Very nice pictures!

They don't actually say it in the article but IC 342 is slightly bigger
than the full moon (but a lot dimmer). Not confusable with a new comet
so it isn't a Messier object (although it is bright enough to be one).

https://en.wikipedia.org/wiki/IC_342

It is in the Caldwell catalogue by Patrick Moore (slightly controversial)

https://en.wikipedia.org/wiki/Caldwell_catalogue

--
Martin Brown

On a sunny day (Thu, 9 Nov 2023 09:12:51 +0000) it happened Martin Brown
<'''newspam'''@nonad.co.uk> wrote in <uii7qq$24hmn$1@dont-email.me>:

>On 09/11/2023 04:49, Jan Panteltje wrote:
>> Scientists show off the wide vision of Europe's Euclid space telescope
>> https://arstechnica.com/space/2023/11/scientists-show-off-the-wide-vision-of-europes-euclid-space-telescope/
>> The $1.5 billion Euclid telescope will use light to study the dark Universe.
>>
>> Very nice pictures!
>
>They don't actually say it in the article but IC 342 is slightly bigger
>than the full moon (but a lot dimmer). Not confusable with a new comet
>so it isn't a Messier object (although it is bright enough to be one).
>
>https://en.wikipedia.org/wiki/IC_342
>
>It is in the Caldwell catalogue by Patrick Moore (slightly controversial)
>
>https://en.wikipedia.org/wiki/Caldwell_catalogue

Nice overview
I found I can use right mouse in Firefox browser and take a screenshot of the Wikipedia list, then select 'whole page'
Gets the whole list.
I won't display in Firefox as you would expect, but to display it I can use 'dillo' web browser on Raspberry,
and then you can scroll over the page again.
I use that method for sheet music now, and last nigh displayed it with my Iconnect laser projector.. 2 meters wide :-)
Resolution of that laser projector is shit (very low), but to project stars and stuff its likely OK.
Will have a go when it is dark, brightness is not much from that thing either , OK on an A4 format paper.
Playing!

I was looking for the northern light here, but too much clouds and rain
somebody a bit more south here photographed this November 6:
https://zoom.nl/foto/landschap/3633939/noorderlicht-friesland

It seems the sun's intensity is now so much higher that the northern light can be seen all the way to the south where I live.
Tt is maybe? related to the glow-ball-worming we observe,
as well as the disappearance of clouds on Neptune:
https://edition.cnn.com/2023/08/22/world/neptune-disappearing-clouds-solar-cycle-sun-scn/index.html
So all that CO2 babble has little to do with warming I think, just a new sales tactic.

On Thursday, November 9, 2023 at 9:59:04 PM UTC+11, Jan Panteltje wrote:
> On a sunny day (Thu, 9 Nov 2023 09:12:51 +0000) it happened Martin Brown
> <'''newspam'''@nonad.co.uk> wrote in <uii7qq$24hmn$1...@dont-email.me>:
> >On 09/11/2023 04:49, Jan Panteltje wrote:
> >> Scientists show off the wide vision of Europe's Euclid space telescope
> >> https://arstechnica.com/space/2023/11/scientists-show-off-the-wide-vision-of-europes-euclid-space-telescope/
> >> The $1.5 billion Euclid telescope will use light to study the dark Universe.
> >>
> >> Very nice pictures!
> >
> >They don't actually say it in the article but IC 342 is slightly bigger
> >than the full moon (but a lot dimmer). Not confusable with a new comet
> >so it isn't a Messier object (although it is bright enough to be one).
> >
> >https://en.wikipedia.org/wiki/IC_342
> >
> >It is in the Caldwell catalogue by Patrick Moore (slightly controversial)
> >
> >https://en.wikipedia.org/wiki/Caldwell_catalogue
> Nice overview
> I found I can use right mouse in Firefox browser and take a screenshot of the Wikipedia list, then select 'whole page'
> Gets the whole list.
> I won't display in Firefox as you would expect, but to display it I can use 'dillo' web browser on Raspberry,
> and then you can scroll over the page again.
> I use that method for sheet music now, and last nigh displayed it with my Iconnect laser projector.. 2 meters wide :-)
> Resolution of that laser projector is shit (very low), but to project stars and stuff its likely OK.
> Will have a go when it is dark, brightness is not much from that thing either , OK on an A4 format paper.
> Playing!
>
> I was looking for the northern light here, but too much clouds and rain
> somebody a bit more south here photographed this November 6:
> https://zoom.nl/foto/landschap/3633939/noorderlicht-friesland
>
> It seems the sun's intensity is now so much higher that the northern light can be seen all the way to the south where I live.

That would be the activiyt in the sun's corona, which can spit out a lot of charged particles.

> It is maybe? related to the global-warming we observe,

It isn't. The global warming is all greenhouse gases in the earth's atmosphere, and has very little to do with the sun, whose thermal output is actually pretty stable.

> as well as the disappearance of clouds on Neptune:
> https://edition.cnn.com/2023/08/22/world/neptune-disappearing-clouds-solar-cycle-sun-scn/index.html

Those clouds are more likely to be photochemical smog than condensation due to changing temperatures. Hard UV from the soiar corona or charged particles from there is a more likely cause.

> So all that CO2 babble has little to do with warming I think, just a new sales tactic.

The fossil carbon extraction industry does want to keep on making money from selling fossil carbon to be burnt as fuel, and lying about the climate consequences is a tactic aimed at keeping the sales up for a few years longer.. It's doomed - solar cells and wind turbines are now cheaper power sources (though they lie about that too).

--
Bill Sloman, Sydney

On Thu, 09 Nov 2023 04:49:27 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

>Scientists show off the wide vision of Europe's Euclid space telescope
> https://arstechnica.com/space/2023/11/scientists-show-off-the-wide-vision-of-europes-euclid-space-telescope/
> The $1.5 billion Euclid telescope will use light to study the dark Universe.
>
>Very nice pictures!

A telescope that uses light seems to be a breakthrough.

On 09/11/2023 10:58, Jan Panteltje wrote:
>
> I was looking for the northern light here, but too much clouds and rain
> somebody a bit more south here photographed this November 6:
> https://zoom.nl/foto/landschap/3633939/noorderlicht-friesland

I glimpsed it on Monday night but missed the really juicy bit :( I have
seen stronger but not of a couple of decades. We are at solar maximum
now which has turned out to be rather stronger than anyone expected.

It was seen by people only a few miles from me. I just wasn't looking at
the right time. It was only very bright here for a couple of hours.

https://www.space.com/strong-geomagnetic-storm-triggers-auroras-worldwide-photos-november-2023

https://spaceweatherarchive.com/2023/07/05/sunspot-counts-hit-21-year-high/

NB humble mobile phone will record it in colour even when the eye sees
only monochrome. It has to be quite strong before you see colour naked
eye. I have never seen it that bright...

> It seems the sun's intensity is now so much higher that the northern light can be seen all the way to the south where I live.
> Tt is maybe? related to the glow-ball-worming we observe,

Not at all. AGW deniers were predicting that the sunspots would vanish
completely this cycle. Here is an example from the Daily Wail in 2018.

https://www.dailymail.co.uk/sciencetech/article-6384457/Lack-sunspots-bring-Space-Age-record-cold-weather-NASA-scientist-warns.html

> as well as the disappearance of clouds on Neptune:
> https://edition.cnn.com/2023/08/22/world/neptune-disappearing-clouds-solar-cycle-sun-scn/index.html
> So all that CO2 babble has little to do with warming I think, just a new sales tactic.

Whilst sunspots and solar activity do make a small difference it is
mainly in fluffing up the Earth's atmosphere (bad for low orbit
satellites) and a tiny increase in intensity. Sunspots are obvious dark
spots but are accompanied by much larger brighter areas called faculae
so there is a net increase in solar output when there are lots of
sunspots ~0.1%.

It pales into insignificance when compared to the Earth's eccentricity
which makes about 7% difference annually between perihelion and
aphelion. It makes a huge difference whether being closest to the sun
coincides with northern or southern hemisphere summer (and also how
eccentric the Earth's orbit is which also varies very slowly).

--
Martin Brown

On 09/11/2023 15:13, John Larkin wrote:
> On Thu, 09 Nov 2023 04:49:27 GMT, Jan Panteltje <alien@comet.invalid>
> wrote:
>
>> Scientists show off the wide vision of Europe's Euclid space telescope
>> https://arstechnica.com/space/2023/11/scientists-show-off-the-wide-vision-of-europes-euclid-space-telescope/
>> The $1.5 billion Euclid telescope will use light to study the dark Universe.
>>
>> Very nice pictures!
>
> A telescope that uses light seems to be a breakthrough.

Telescopes using light have been around for far too long for there to be
anything unusual found by serendipity today. Wider fields might yield
some interesting correlations and pretty pictures - we will see.

The interesting wavebands right now are mm wave and terahertz imaging.
Optical interferometry is also gaining ground but for now they are in
practice still restricted to near infrared operation. It is hellishly
difficult to phase track for interferometry at optical wavelengths.

I have seen a terahertz image of my favourite supernova remnant Cass A
aka 3C461 but AFAIK it has never made it into the open literature.

--
Martin Brown

On a sunny day (Thu, 9 Nov 2023 15:50:00 +0000) it happened Martin Brown
<'''newspam'''@nonad.co.uk> wrote in <uiiv3h$28unu$1@dont-email.me>:

>On 09/11/2023 10:58, Jan Panteltje wrote:
>>
>> I was looking for the northern light here, but too much clouds and rain
>> somebody a bit more south here photographed this November 6:
>> https://zoom.nl/foto/landschap/3633939/noorderlicht-friesland
>
>I glimpsed it on Monday night but missed the really juicy bit :( I have
>seen stronger but not of a couple of decades. We are at solar maximum
>now which has turned out to be rather stronger than anyone expected.
>
>It was seen by people only a few miles from me. I just wasn't looking at
>the right time. It was only very bright here for a couple of hours.
>
>https://www.space.com/strong-geomagnetic-storm-triggers-auroras-worldwide-photos-november-2023
>
>https://spaceweatherarchive.com/2023/07/05/sunspot-counts-hit-21-year-high/
>
>NB humble mobile phone will record it in colour even when the eye sees
>only monochrome. It has to be quite strong before you see colour naked
>eye. I have never seen it that bright...
>
>> It seems the sun's intensity is now so much higher that the northern light can be seen all the way to the south where I live.
>> Tt is maybe? related to the glow-ball-worming we observe,
>
>Not at all. AGW deniers were predicting that the sunspots would vanish
>completely this cycle. Here is an example from the Daily Wail in 2018.
>
>https://www.dailymail.co.uk/sciencetech/article-6384457/Lack-sunspots-bring-Space-Age-record-cold-weather-NASA-scientist-warns.ht
>ml
>
>> as well as the disappearance of clouds on Neptune:
>> https://edition.cnn.com/2023/08/22/world/neptune-disappearing-clouds-solar-cycle-sun-scn/index.html
>> So all that CO2 babble has little to do with warming I think, just a new sales tactic.
>
>Whilst sunspots and solar activity do make a small difference it is
>mainly in fluffing up the Earth's atmosphere (bad for low orbit
>satellites) and a tiny increase in intensity. Sunspots are obvious dark
>spots but are accompanied by much larger brighter areas called faculae
>so there is a net increase in solar output when there are lots of
>sunspots ~0.1%.
>
>It pales into insignificance when compared to the Earth's eccentricity
>which makes about 7% difference annually between perihelion and
>aphelion. It makes a huge difference whether being closest to the sun
>coincides with northern or southern hemisphere summer (and also how
>eccentric the Earth's orbit is which also varies very slowly).

Yes. Milancovitch cycles:
https://old.world-mysteries.com/alignments/mpl_al3b.htm

But there is all sorts of radiation coming from the sun, not so much dark spot related
we do no know much about.
Neither do we know much about the processes inside the sun and the variation of those over time.
IR radiation, other wavelength...

CO2 babble is mostly sales related.
:-)
Kids fall for it.
It is a bit like witch hunts were in medieval times.

On Friday, November 10, 2023 at 5:09:22 PM UTC+11, Jan Panteltje wrote:
> On a sunny day (Thu, 9 Nov 2023 15:50:00 +0000) it happened Martin Brown
> <'''newspam'''@nonad.co.uk> wrote in <uiiv3h$28unu$1...@dont-email.me>:
> >On 09/11/2023 10:58, Jan Panteltje wrote:
> >>
> >> I was looking for the northern light here, but too much clouds and rain
> >> somebody a bit more south here photographed this November 6:
> >> https://zoom.nl/foto/landschap/3633939/noorderlicht-friesland
> >
> >I glimpsed it on Monday night but missed the really juicy bit :( I have
> >seen stronger but not of a couple of decades. We are at solar maximum
> >now which has turned out to be rather stronger than anyone expected.
> >
> >It was seen by people only a few miles from me. I just wasn't looking at
> >the right time. It was only very bright here for a couple of hours.
> >
> >https://www.space.com/strong-geomagnetic-storm-triggers-auroras-worldwide-photos-november-2023
> >
> >https://spaceweatherarchive.com/2023/07/05/sunspot-counts-hit-21-year-high/
> >
> >NB humble mobile phone will record it in colour even when the eye sees
> >only monochrome. It has to be quite strong before you see colour naked
> >eye. I have never seen it that bright...
> >
> >> It seems the sun's intensity is now so much higher that the northern light can be seen all the way to the south where I live.
> >> Tt is maybe? related to the glow-ball-worming we observe,
> >
> >Not at all. AGW deniers were predicting that the sunspots would vanish
> >completely this cycle. Here is an example from the Daily Wail in 2018.
> >
> >https://www.dailymail.co.uk/sciencetech/article-6384457/Lack-sunspots-bring-Space-Age-record-cold-weather-NASA-scientist-warns.ht
> >ml
> >
> >> as well as the disappearance of clouds on Neptune:
> >> https://edition.cnn.com/2023/08/22/world/neptune-disappearing-clouds-solar-cycle-sun-scn/index.html
> >> So all that CO2 babble has little to do with warming I think, just a new sales tactic.
> >
> >Whilst sunspots and solar activity do make a small difference it is
> >mainly in fluffing up the Earth's atmosphere (bad for low orbit
> >satellites) and a tiny increase in intensity. Sunspots are obvious dark
> >spots but are accompanied by much larger brighter areas called faculae
> >so there is a net increase in solar output when there are lots of
> >sunspots ~0.1%.
> >
> >It pales into insignificance when compared to the Earth's eccentricity
> >which makes about 7% difference annually between perihelion and
> >aphelion. It makes a huge difference whether being closest to the sun
> >coincides with northern or southern hemisphere summer (and also how
> >eccentric the Earth's orbit is which also varies very slowly).
>
> Yes. Milancovitch cycles:
> https://old.world-mysteries.com/alignments/mpl_al3b.htm
>
> But there is all sorts of radiation coming from the sun, not so much dark spot related we do not know much about.

The bulk of the radiation coming from the sun - and certainly the overwhelming bulk of the energy - is simple black body thermal radiation coming from the 6000K solar surface, The corona - what there is of it - is a lot hotter, stirred up by magnetic fields, and produces a small amount of higher energy radiation and occasional burst of charged particles.

> Neither do we know much about the processes inside the sun and the variation of those over time. IR radiation, other wavelength...

https://en.wikipedia.org/wiki/Asteroseismology

means that we know quite a lot about the processes going on inside the sun and their variation over time. They aren't all that complicated.
> CO2 babble is mostly sales related.
> :-)
> Kids fall for it.

What Jan Panteltje has fallen for are lies designed to let the fossil carbon extraction industry keep on selling fossil carbon as fuel for a bit longer.

Jan is childish enough to fall for them.

> It is a bit like witch hunts were in medieval times.

Not all that much like it. It does depend on gullible idiots like Jan, so it has that much in common with past lunacies.

--
Bill Sloman, Sydney