Owen Gwynne

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" Not as worth following as some of my posts suggest

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One galaxy, two supernovae. NGC7331 has given us two supernovae in the last 14 months. However, they were at least 8800 light years apart, so only sentient beings along our line of sight would have seen them this close together. 🔭

A collage from the Eclipse, as seen at the village of Ariza in Aragon. Many thanks to them for organising a number of observing spots. 🔭 The partial Sunset was an extra special bonus.

One of the great things about France is that they have a nation-wide Nuits des Etoiles - over a weekend early in August, where local Astro societies have astronomy events🔭 Last night was at St Claud in Charente, lots of families and our SmartScope could show a variety of targets.

I'm not sure my SS50 🔭 has ever done such a 'sharp' image of a the Veil Nebula. A particularly clear night in Confolens tonight, after all the gunk from the fires recently. No additional processing, just 45 m of data

Not only is the Moon in one of the lower 'summer' zodiac constellations, Capricorn, it's also tracking below the ecliptic because of the angle of it's orbit, so it'll not reach much above 15 degrees. Having to look through the mucky, atmosphere with all these wildfires. Seestar 🔭

Took the SeeStar 🔭 out last night to capture the North America Nebula NGC 7000 for about 40 minutes. Stacked in Siril and a Histogram Stretch brought out more detail than I expected to be honest .

People may have heard of the recent discovery of a Supernova in the galaxy NGC5907 - an edge-on Spiral Galaxy in the constellation Draco. The supernova (called SN2026kid) is still visible - here is an image taken this evening with a SeeStar50 over about 20 minutes. #astronomy

🔭 I've known in principle that the different colours of aurorae are due to different elements at different heights, but the facts have never really 'stuck' in my mind. So I made this chart to help me remember.

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

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

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 🔭

Initially discovered as an X-Ray source by a sounding rocket launch in 1964, the associated radio emissions allowed it to be identified as a companion to HD226868 in 1971. The star is in a close orbit of a 15-20 M⨀ Black Hole, and material dragged from the star feeds the X-Ray emissions

@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.

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!

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!

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!

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.

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

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

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