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"
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
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
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 🔭
@robinince.bsky.social - if we'd had more time, I'd have asked if you'd come across RIchard Ayoade's "The Unfinished Harauld Hughes'; a narrative on making of a documentary about a fictional author?
Of course, Ayoade felt obliged to write his fictitious complete works in three accompanying volumes.
Of course, Ayoade felt obliged to write his fictitious complete works in three accompanying volumes.
May 31, 2025 at 10:40 PM
@robinince.bsky.social - if we'd had more time, I'd have asked if you'd come across RIchard Ayoade's "The Unfinished Harauld Hughes'; a narrative on making of a documentary about a fictional author?
Of course, Ayoade felt obliged to write his fictitious complete works in three accompanying volumes.
Of course, Ayoade felt obliged to write his fictitious complete works in three accompanying volumes.
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!
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/
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
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
Hi @sainsburys.bsky.social - I was in your Cheshire Oaks store yesterday when you decided to play a promotion for a new book by David Walliams over the tannoy.
Please don't - he's an author that has consistently punched down on the poor, the old, the fat and the different. We do not need that.
Please don't - he's an author that has consistently punched down on the poor, the old, the fat and the different. We do not need that.
November 21, 2024 at 3:42 PM
Hi @sainsburys.bsky.social - I was in your Cheshire Oaks store yesterday when you decided to play a promotion for a new book by David Walliams over the tannoy.
Please don't - he's an author that has consistently punched down on the poor, the old, the fat and the different. We do not need that.
Please don't - he's an author that has consistently punched down on the poor, the old, the fat and the different. We do not need that.
A view of Venus just before the Moon moved in front of it. A fortunate gap in the clouds
November 9, 2023 at 10:33 AM
A view of Venus just before the Moon moved in front of it. A fortunate gap in the clouds