@cosmos4u.bsky.social
Dramatically brighter aurora over Bochum, Germany, around 3:30 UTC - now it was easily visible to the naked eye! As large pinkish fields behind a partially cloudy foreground - and this with major light pollution *and* a last quarter Moon high in the sky.
November 12, 2025 at 4:07 AM
Dramatically brighter aurora over Bochum, Germany, around 3:30 UTC - now it was easily visible to the naked eye! As large pinkish fields behind a partially cloudy foreground - and this with major light pollution *and* a last quarter Moon high in the sky.
Photographic aurora between the light-pollution lit clouds of Bochum, Germany, 1/2 hour ago (4 seconds with cellphone at f/1.79 and ISO 3200) - that's how the G4 solar storm tonight is playing out here.
November 12, 2025 at 2:39 AM
Photographic aurora between the light-pollution lit clouds of Bochum, Germany, 1/2 hour ago (4 seconds with cellphone at f/1.79 and ISO 3200) - that's how the G4 solar storm tonight is playing out here.
A group is organizing an observing campaign through the Citizen Science Working Group of the LUMIO mission to observe lunar impact flashes (LIFs) from space - the "LIF Geminid Campaign" (LGC) comes during the peak of the Geminid meteoroid stream, 13-15 Dec.: more in www.facebook.com/dan.fischer....
November 11, 2025 at 10:15 PM
A group is organizing an observing campaign through the Citizen Science Working Group of the LUMIO mission to observe lunar impact flashes (LIFs) from space - the "LIF Geminid Campaign" (LGC) comes during the peak of the Geminid meteoroid stream, 13-15 Dec.: more in www.facebook.com/dan.fischer....
This image of the stellar stream of Messier 61 by Rubin - iopscience.iop.org/article/10.3... - is the best but not the first. It had already been imaged by amateurs: www.flickr.com/photos/13325... and www.galactic-hunter.com/post/messier... and app.astrobin.com/i/0az5qv and app.astrobin.com/i/ldptvo
November 9, 2025 at 4:05 AM
This image of the stellar stream of Messier 61 by Rubin - iopscience.iop.org/article/10.3... - is the best but not the first. It had already been imaged by amateurs: www.flickr.com/photos/13325... and www.galactic-hunter.com/post/messier... and app.astrobin.com/i/0az5qv and app.astrobin.com/i/ldptvo
Dust, sand and wind drive slope streaks on Mars: www.nature.com/articles/s41... -> Swoosh! www.esa.int/ESA_Multimed...
November 9, 2025 at 3:54 AM
Dust, sand and wind drive slope streaks on Mars: www.nature.com/articles/s41... -> Swoosh! www.esa.int/ESA_Multimed...
Still pretty today higher in twilight. 3.2 seconds single shot.
November 7, 2025 at 7:35 PM
Still pretty today higher in twilight. 3.2 seconds single shot.
Yay, a 6th sighting of comet Lemmon for me this evening from Bochum, Germany - bridge camera at max. zoom, 3.2 seconds at f/2.8 and ISO 1600. See www.facebook.com/media/set/?v... for the other five evenings since 20 October.
November 7, 2025 at 5:28 PM
Yay, a 6th sighting of comet Lemmon for me this evening from Bochum, Germany - bridge camera at max. zoom, 3.2 seconds at f/2.8 and ISO 1600. See www.facebook.com/media/set/?v... for the other five evenings since 20 October.
In ~2 Stunden ist er übrigens am supersten, wenn er Deutschland (!) am nächsten kommt: scicomm.xyz/@Planetarium...
November 5, 2025 at 9:28 PM
In ~2 Stunden ist er übrigens am supersten, wenn er Deutschland (!) am nächsten kommt: scicomm.xyz/@Planetarium...
How interstellar comet 3I/ATLAS was observed by several coronagraphs on satellites through October: see scicomm.xyz/@cosmos4u/11... for sources and analysis!
October 30, 2025 at 3:08 AM
How interstellar comet 3I/ATLAS was observed by several coronagraphs on satellites through October: see scicomm.xyz/@cosmos4u/11... for sources and analysis!
The clouds over Bochum, Germany, cleared too late this evening, so instead of Lemmon I tried comet C/2025 R2 (SWAN) for a change: here it is: both pictures with a bridge camera on a tripod, 5 seconds at f/2.8 and ISO 3200. It's fading: according to cobs.si/obs_list?id=... the brightness is 6.7 mag.
October 28, 2025 at 9:59 PM
The clouds over Bochum, Germany, cleared too late this evening, so instead of Lemmon I tried comet C/2025 R2 (SWAN) for a change: here it is: both pictures with a bridge camera on a tripod, 5 seconds at f/2.8 and ISO 3200. It's fading: according to cobs.si/obs_list?id=... the brightness is 6.7 mag.
Not only Lemmon but also comet SWAN has been imaged by Kimiya Yui from the ISS: in x.com/Astro_Kimiya... it's peeking through the space station's solar arrays. (AFAIK this is a first, *two* comets getting imaged from the ISS at the same time.)
October 26, 2025 at 12:46 AM
Not only Lemmon but also comet SWAN has been imaged by Kimiya Yui from the ISS: in x.com/Astro_Kimiya... it's peeking through the space station's solar arrays. (AFAIK this is a first, *two* comets getting imaged from the ISS at the same time.)
Comet #Lemmon ... bathing in #aurora ... seen from the #ISS: another Kimiya Yui photograph - x.com/Astro_Kimiya... - with Gemma in CrB the bright star on the left.
October 25, 2025 at 12:10 AM
Comet #Lemmon ... bathing in #aurora ... seen from the #ISS: another Kimiya Yui photograph - x.com/Astro_Kimiya... - with Gemma in CrB the bright star on the left.
30 years ago #OTD I was in #India to observe a Total #SolarEclipse in Neem Ka Thana, Rajasthan: my report on the whole trip can be found at geocities.restorativland.org/CapeCanavera... while the picture here was taken by Voyto Rušin at the same observing camp: www.zam.fme.vutbr.cz/~druck/eclip...
October 24, 2025 at 4:43 PM
30 years ago #OTD I was in #India to observe a Total #SolarEclipse in Neem Ka Thana, Rajasthan: my report on the whole trip can be found at geocities.restorativland.org/CapeCanavera... while the picture here was taken by Voyto Rušin at the same observing camp: www.zam.fme.vutbr.cz/~druck/eclip...
@dsfpspacefl1ght.bsky.social While browsing newspaper articles on the Venera missions in the 1970s I found an interesting story - scicomm.xyz/@cosmos4u/11... - about American manned lunar visions voiced at the IAF conference in Prague in 1977 ... I reckon John Disher was just pondering options?
October 24, 2025 at 1:58 AM
@dsfpspacefl1ght.bsky.social While browsing newspaper articles on the Venera missions in the 1970s I found an interesting story - scicomm.xyz/@cosmos4u/11... - about American manned lunar visions voiced at the IAF conference in Prague in 1977 ... I reckon John Disher was just pondering options?
50 years (and one day) ago the first images from the surface of another planet reached Earth - not from Mars but from Venus, by the Soviet Union's #Venera 9 lander: www.facebook.com/Mercury.3488... (the image here from www.planetary.org/space-images... shows a cleaned-up panorama the lander took).
October 23, 2025 at 6:46 PM
50 years (and one day) ago the first images from the surface of another planet reached Earth - not from Mars but from Venus, by the Soviet Union's #Venera 9 lander: www.facebook.com/Mercury.3488... (the image here from www.planetary.org/space-images... shows a cleaned-up panorama the lander took).
What comet #Lemmon looks like from the #ISS right now - a picture by the Japanese #astronaut Kimiya Yui from x.com/Astro_Kimiya... with more timesteps. And see also x.com/Astro_Kimiya... and x.com/Astro_Kimiya... and the animation x.com/Astro_Kimiya...
October 22, 2025 at 11:29 PM
What comet #Lemmon looks like from the #ISS right now - a picture by the Japanese #astronaut Kimiya Yui from x.com/Astro_Kimiya... with more timesteps. And see also x.com/Astro_Kimiya... and x.com/Astro_Kimiya... and the animation x.com/Astro_Kimiya...
My first capture of comet #Lemmon 50 minutes ago! Under the most crappy conditions - as outlined in www.facebook.com/dan.fischer.... where also more pictures are shown - but at ~4.3 mag. according to cobs.si/obs_list?id=... and with a highly condensed coma the comet made it through in seconds.
October 20, 2025 at 7:46 PM
My first capture of comet #Lemmon 50 minutes ago! Under the most crappy conditions - as outlined in www.facebook.com/dan.fischer.... where also more pictures are shown - but at ~4.3 mag. according to cobs.si/obs_list?id=... and with a highly condensed coma the comet made it through in seconds.
The return of the #Starship close-up, grabbed from the videos in x.com/SpaceX/statu...
October 14, 2025 at 9:31 PM
The return of the #Starship close-up, grabbed from the videos in x.com/SpaceX/statu...
Deep imaging of the galaxy Malin 2 shows new faint structures and a candidate satellite dwarf galaxy: www.aanda.org/articles/aa/... -> IAC research reveals hidden structures and a turbulent past in one of the largest spiral galaxies in the Universe: www.iac.es/en/outreach/...
October 14, 2025 at 4:27 PM
Deep imaging of the galaxy Malin 2 shows new faint structures and a candidate satellite dwarf galaxy: www.aanda.org/articles/aa/... -> IAC research reveals hidden structures and a turbulent past in one of the largest spiral galaxies in the Universe: www.iac.es/en/outreach/...
And the ditching of the #Starship after test #11, seen from an onboard camera and a buoy which was close but didn't look in the best direction. Anyway, everything seems to have gone just as planned this time, including aggressive reentry experiments with tiles removed and hard maneuvers.
October 14, 2025 at 12:42 AM
And the ditching of the #Starship after test #11, seen from an onboard camera and a buoy which was close but didn't look in the best direction. Anyway, everything seems to have gone just as planned this time, including aggressive reentry experiments with tiles removed and hard maneuvers.
Got clear sky right now? An early chance to welcome comet C/2026 A6 (Lemmon) - currently ~5.5 mag. - in the evening sky! Here's the view from Bochum, Germany, at 20:00 CEST: comet at 14° in azimuth 323° (i.e. NW), Sun 12° below horizon. At 20:20 the Sun will be 15° below, the comet 12.5° above it.
October 10, 2025 at 6:03 PM
Got clear sky right now? An early chance to welcome comet C/2026 A6 (Lemmon) - currently ~5.5 mag. - in the evening sky! Here's the view from Bochum, Germany, at 20:00 CEST: comet at 14° in azimuth 323° (i.e. NW), Sun 12° below horizon. At 20:20 the Sun will be 15° below, the comet 12.5° above it.
Some 'domeshots' from the new Bochum astrophysics planetarium show 'Our Exotic Universe' ... and if you want to know what's going on here: come and watch! Dates & tickets: planetarium-bochum.de/de_DE/progra...
October 8, 2025 at 6:11 PM
Some 'domeshots' from the new Bochum astrophysics planetarium show 'Our Exotic Universe' ... and if you want to know what's going on here: come and watch! Dates & tickets: planetarium-bochum.de/de_DE/progra...
Guests of the (2nd) premiere of the Bochum astroparticles planetarium show - most are from the RAPP: www.rapp-center.de
October 8, 2025 at 3:52 PM
Guests of the (2nd) premiere of the Bochum astroparticles planetarium show - most are from the RAPP: www.rapp-center.de