Owen Gwynne
@owengwynne.bsky.social
Lover of science especially astronomy. Lives in NW England. In training for retirement.
As Einstein said "Only a fool believes everything they read on X - aye, and be sceptical of 'owt on Bluesky"
As Einstein said "Only a fool believes everything they read on X - aye, and be sceptical of 'owt on Bluesky"
Probably wasn't widespread, but certainly it seems that it was a term that was used in reference to gays.
OED has a citation from 1894 written by the Marquess of Queensberry
OED has a citation from 1894 written by the Marquess of Queensberry
November 21, 2025 at 8:39 PM
Probably wasn't widespread, but certainly it seems that it was a term that was used in reference to gays.
OED has a citation from 1894 written by the Marquess of Queensberry
OED has a citation from 1894 written by the Marquess of Queensberry
Perilune yesterday, and Apolune last April.
Cloudy yesterday, so this is 20 hours later, but only about 800km further away than the closest approach.
13.6% larger
#astronomy
Cloudy yesterday, so this is 20 hours later, but only about 800km further away than the closest approach.
13.6% larger
#astronomy
November 6, 2025 at 10:28 PM
Perilune yesterday, and Apolune last April.
Cloudy yesterday, so this is 20 hours later, but only about 800km further away than the closest approach.
13.6% larger
#astronomy
Cloudy yesterday, so this is 20 hours later, but only about 800km further away than the closest approach.
13.6% larger
#astronomy
I have to share one of the finest Private Eye cartoons ever.
September 4, 2025 at 8:42 AM
I have to share one of the finest Private Eye cartoons ever.
Ah, I see why people use things like StarNet to make #astro image processing easier.
Here's my first use of it. Target is IC5146, the Cocoon Nebula in Cygnus.
225x10s Seestar images, stacked in Siril before having stars extracted. The starless image processed in Affinity and recombined. Left/Right
Here's my first use of it. Target is IC5146, the Cocoon Nebula in Cygnus.
225x10s Seestar images, stacked in Siril before having stars extracted. The starless image processed in Affinity and recombined. Left/Right
August 4, 2025 at 9:11 AM
Ah, I see why people use things like StarNet to make #astro image processing easier.
Here's my first use of it. Target is IC5146, the Cocoon Nebula in Cygnus.
225x10s Seestar images, stacked in Siril before having stars extracted. The starless image processed in Affinity and recombined. Left/Right
Here's my first use of it. Target is IC5146, the Cocoon Nebula in Cygnus.
225x10s Seestar images, stacked in Siril before having stars extracted. The starless image processed in Affinity and recombined. Left/Right
I think it's towards the other end of the core, this is my SeeStar50 image from this evening.
Other images I've seen indicate this position
Other images I've seen indicate this position
July 21, 2025 at 10:42 PM
I think it's towards the other end of the core, this is my SeeStar50 image from this evening.
Other images I've seen indicate this position
Other images I've seen indicate this position
So, who reckons you can image a Black Hole/X-Ray source with a Seestar?
Surprisingly, you can (in a way) - The marked star is HD226868, the blue supergiant star that feeds the Black Hole X-Ray source Cygnus X1. It's about 1/2 degree from Eta Cygni (top right), so quite easy to find with binoculars 🔭
Surprisingly, you can (in a way) - The marked star is HD226868, the blue supergiant star that feeds the Black Hole X-Ray source Cygnus X1. It's about 1/2 degree from Eta Cygni (top right), so quite easy to find with binoculars 🔭
July 19, 2025 at 8:21 PM
So, who reckons you can image a Black Hole/X-Ray source with a Seestar?
Surprisingly, you can (in a way) - The marked star is HD226868, the blue supergiant star that feeds the Black Hole X-Ray source Cygnus X1. It's about 1/2 degree from Eta Cygni (top right), so quite easy to find with binoculars 🔭
Surprisingly, you can (in a way) - The marked star is HD226868, the blue supergiant star that feeds the Black Hole X-Ray source Cygnus X1. It's about 1/2 degree from Eta Cygni (top right), so quite easy to find with binoculars 🔭
Indeed. it's unlikely that people would shade by gender and then go to the next step to compare by gender as well, which produces separate circles for each rather than doing the silly thing they did
May 27, 2025 at 10:08 AM
Indeed. it's unlikely that people would shade by gender and then go to the next step to compare by gender as well, which produces separate circles for each rather than doing the silly thing they did
Areas expressed as column chart.
May 27, 2025 at 9:55 AM
Areas expressed as column chart.
Was doing some #astronomy outreach at a local school, showing them the Sun and sunspots.
Lots of things crossing its disc, some will be birds, but I think some might be satellites.
Any thoughts?
Oh, and stay to the end!
Lots of things crossing its disc, some will be birds, but I think some might be satellites.
Any thoughts?
Oh, and stay to the end!
May 23, 2025 at 2:57 PM
Was doing some #astronomy outreach at a local school, showing them the Sun and sunspots.
Lots of things crossing its disc, some will be birds, but I think some might be satellites.
Any thoughts?
Oh, and stay to the end!
Lots of things crossing its disc, some will be birds, but I think some might be satellites.
Any thoughts?
Oh, and stay to the end!
Considering Lunar #Astronomy having observed the Earthshine on the 2 day old Moon last evening.
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
April 30, 2025 at 11:17 PM
Considering Lunar #Astronomy having observed the Earthshine on the 2 day old Moon last evening.
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
Considering Lunar #Astronomers: having observed the Earthshine on the 2 day old Moon last evening.
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
April 30, 2025 at 7:50 PM
Considering Lunar #Astronomers: having observed the Earthshine on the 2 day old Moon last evening.
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
As seen on the Moon, the Earthshine has almost 30x the overall brightness than the Full Moon gives on Earth.
If there were any Lunar Astronomers, they'd really hate the Earth!
Good to know. Where we were it was cloudy last evening, but I caught the almost Full Moon at within an hour of actual ApSelene - now have to wait until early Dec for the best PeriSelene.
April 13, 2025 at 10:04 PM
Good to know. Where we were it was cloudy last evening, but I caught the almost Full Moon at within an hour of actual ApSelene - now have to wait until early Dec for the best PeriSelene.
We caught a sequence with the SeeStar, though it was badly affected by high level cloud
Gave away over 40 pairs of eclipse glasses too.
,
Gave away over 40 pairs of eclipse glasses too.
,
March 29, 2025 at 1:07 PM
We caught a sequence with the SeeStar, though it was badly affected by high level cloud
Gave away over 40 pairs of eclipse glasses too.
,
Gave away over 40 pairs of eclipse glasses too.
,
Sidewalk #Astronomy for the Partial Solar Eclipse in NW England. Obscured by clouds, but you can see the dark side of the moon.
More than 40 pairs of eclipse glasses given away.
More than 40 pairs of eclipse glasses given away.
March 29, 2025 at 12:32 PM
Sidewalk #Astronomy for the Partial Solar Eclipse in NW England. Obscured by clouds, but you can see the dark side of the moon.
More than 40 pairs of eclipse glasses given away.
More than 40 pairs of eclipse glasses given away.
Rather than imaging a 'target' last night, I asked my #seestar50 to look at a relatively nondescript 'NGC' things in Coma Berenices: NGC 4274 and NGC4278.
In only 65 minutes I imaged the home of billions of solar systems
In only 65 minutes I imaged the home of billions of solar systems
March 28, 2025 at 1:17 AM
Rather than imaging a 'target' last night, I asked my #seestar50 to look at a relatively nondescript 'NGC' things in Coma Berenices: NGC 4274 and NGC4278.
In only 65 minutes I imaged the home of billions of solar systems
In only 65 minutes I imaged the home of billions of solar systems
Love this - I'm pretty sure that geologists will agree, yes? @seismatters.bsky.social
xkcd.com/3068/
xkcd.com/3068/
March 27, 2025 at 3:19 PM
Love this - I'm pretty sure that geologists will agree, yes? @seismatters.bsky.social
xkcd.com/3068/
xkcd.com/3068/
Is it a good place to mention the ring shaped roundabout at the end of Prince Albert Road by Regent's Park?
February 10, 2025 at 3:38 PM
Is it a good place to mention the ring shaped roundabout at the end of Prince Albert Road by Regent's Park?
Catching up with the latest Lovell Lecture at Jodrell Bank (Chaos at Cosmic Dawn) with Phil Bull - and we come out to this...
#astronomy at top level photogenics
#astronomy at top level photogenics
February 7, 2025 at 1:23 AM
Catching up with the latest Lovell Lecture at Jodrell Bank (Chaos at Cosmic Dawn) with Phil Bull - and we come out to this...
#astronomy at top level photogenics
#astronomy at top level photogenics
That's what we do with potentially X Rated sunspot groups
February 2, 2025 at 12:13 PM
That's what we do with potentially X Rated sunspot groups
Science with the SeeStar, the advantage of having a fixed format rig.
The observed size of the Sun's disc near Perihelion (375 pixels) and near Aphelion (363 pixels), demonstrating that the Earth's orbit is not circular.
#astronomy
The observed size of the Sun's disc near Perihelion (375 pixels) and near Aphelion (363 pixels), demonstrating that the Earth's orbit is not circular.
#astronomy
January 14, 2025 at 11:57 PM
Science with the SeeStar, the advantage of having a fixed format rig.
The observed size of the Sun's disc near Perihelion (375 pixels) and near Aphelion (363 pixels), demonstrating that the Earth's orbit is not circular.
#astronomy
The observed size of the Sun's disc near Perihelion (375 pixels) and near Aphelion (363 pixels), demonstrating that the Earth's orbit is not circular.
#astronomy
The nice thing about the SeeStar is that it allows you to image things you've not heard of before.
Last night's example being the Flaming Star Nebula IC 405
Last night's example being the Flaming Star Nebula IC 405
January 3, 2025 at 7:32 PM
The nice thing about the SeeStar is that it allows you to image things you've not heard of before.
Last night's example being the Flaming Star Nebula IC 405
Last night's example being the Flaming Star Nebula IC 405
You'll enjoy this from the SMBC then...
November 27, 2024 at 11:47 PM
You'll enjoy this from the SMBC then...
Using prime numbers meant that there were only two ways message could only be displayed as one of two rectangular patterns. 23wide by 73 tall, or vice versa. If any recipients tried the 73 wide version, it would have displayed as...
November 16, 2024 at 8:21 PM
Using prime numbers meant that there were only two ways message could only be displayed as one of two rectangular patterns. 23wide by 73 tall, or vice versa. If any recipients tried the 73 wide version, it would have displayed as...