Two satellite proposals are threatening the night sky. Learn here how to act:
darksky.org/news/two-sat...
27.02.2026 12:17
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Two satellite proposals are threatening the night sky. Learn here how to act:
darksky.org/news/two-sat...
It is time we stop this madness. Just because you can, doesn't mean you should. We have to stop these billionaires ruining our planet.
Timelapse over 4 weeks (Jan 19 - Feb 13) showing the steady brightening of Comet MAPS as it dives towards the sun.
It is a rather nonsensical thing to repeal a scientific finding. We don't have the power to change the laws of nature. The choice to be willfully ignorant does not make any consequences go away.
C/2026 A1 (MAPS) on Feb. 10
C/2026 A1 (MAPS) on Feb. 10
Details in the image.
#CometWatch
Geen probleem. Ik moet er wel bij zeggen dat het nog erg onzeker is hoe deze zich gaat ontwikkelen. De huidige inschatting is vrij voorzichtig. Het is trouwens "Gideon" 🙂
Possible Kreutz comet 6AC4721
Possible Kreutz #comet 6AC4721 as imaged earlier today (Jan. 18) with iTelescope's 0.51m CDK (T30) at Siding Spring Observatory (Q62).
This one might(!) become interesting around April of this year.
#cometobs
Armed paramilitary forcefully (and illegally) entering a house at gunpoint without a warrant, intimidating and harassing civilians.
This is 1930's/1940's Nazi-Germany razzia stuff.
Na de ellende van vorig jaar ben ik dit jaar maar het land uit gevlucht. Wat er thuis in NL gebeurt is absurd. Wekenlang overlast door vuurwerk, om niet te spreken over doden, gewonden, zware branden, etc. Dit heeft niets met traditie te maken. Het is egocentrisch wangedrag. De jaarlijkse 'purge'.
Interstellar #comet 3I/ATLAS as imaged on December 25th.
"The fallacies behind the cult of Loeb"
New entry in my blog. Other articles have covered the scientific aspects; this one reflects on the social phenomenon. I argue it’s driven by a series of fallacies
tinieblasyestrellas.blogspot.com/2025/11/the-...
Hi. Making videos is not my thing. Where did you see this? Was it really astrological or did you mean astronomical? I usually don't mind if people share my work, if they properly credit it and it the narrative is not complete nonsense (like astroloy).
Top! Hier wil het maar niet lukken. Gistermiddag was ik even hoopvol maar rond zonsondergang trok het toch weer helemaal dicht. Toch even naar de polder gereden (want je weet maar nooit), maar helaas. Hopelijk vrijdag...?
Een indrukwekkend plaatje is het niet, maar het lukt al wel met een 8" RC vanuit Dordrecht.
Observation of the tail of comet C/1743 X1 by Jean-Philippe Loys de Cheseaux on the mornings of 8 and 9 March 1744, from 1744. Traitè de la Comete qui a Paru en Decembre 1743 & en Janvier, Fevrier & Mars 1744. Lausanne, Marc-Michel Bousquet & Compagnie., my scan/collection.
Observation of the tail of comet C/1743 X1 by Jean-Philippe Loys de Cheseaux on the mornings of 8 and 9 March 1744, from 1744. Traitè de la Comete qui a Paru en Decembre 1743 & en Janvier, Fevrier & Mars 1744. Lausanne, Marc-Michel Bousquet & Compagnie., my scan/collection.
"THE GREAT COMET C/1743 X1: POSSIBLE IDENTIFICATION IN HISTORIC RECORDS OF 1402, 1032, 676, and 336" Journal of Astronomical History and Heritage, 28(1), 29 – 49 (2025). Abstract: "The great comet of 1744, C/1743 X1, is notable for its brightness, which enabled it to be seen close to the Sun during the day and exhibit an impressive tail. One of the first orbit calculators, O. P. Hiorter, had already noted the comet's resemblance to the great daylight comet C/1402 D1. This was later supported by H. W. M. Olbers and J. Holetschek. This work re-evaluates the historic astrometry and shows that the data are fully compatible with the identity first suggested by Hiorter. Based on a tentative link of both apparitions, we show that the comets of 1032, 676, and possibly of 336 are also fully compatible with this comet based on the comparison with the historic records. We present a prediction for the next perihelion passage, which might occur at the end of 2097."
Finally! The paper is out!
Want to see a naked eye daylight comet? Mark your calendars for 2097! At least if the "ancestry line" given in the paper is correct. Sadly, I won't live to see it. Would I bet my money? I'd say yes.
www.sciengine.com/JAHH/doi/10....
☄️🔭 #CometWatch #histsci #histastro
Comet C/2025 F2 (SWAN) seems to be running out of steam. recent images show the comet becoming fainter despite nearing perihelion. It could still be an effect of the moon and low height but it is certain that the comet does not brighten.
🔭☄️ #CometWatch
Comet SWAN25F has been announced officially as C/2025 F2 (SWAN). CBET 5538 gives a timeline of the events & credit to all the amateurs who were crucial in discovery & confirmation it. I won't mention the MPEC which is a disgrace to all of us.
🔭☄️ #CometWatch
www.cbat.eps.harvard.edu/iau/cbet/005...
Orbit of C/2025 F2 (SWAN)
The bright new #comet temporarily named SWAN25F has now been formally designated C/2025 F2 (SWAN)
The orbit is perpendicular to the ecliptic (i=90.4°) from north to south. Perihelion will occur on May 1 at 0.33 au from the sun.
See MPEC 2025-G102 and astro.vanbuitenen.nl/comet/2025F2
#CometWatch
Dat heet MAGA
Ja, want de veiligheid gaat er natuurlijk fors op vooruit als overal landmijnen liggen. Dieptriest.
Is zo'n extra-parlementair kabinet, waarbij je net doet alsof je het op hoofdlijnen wel eens zou zijn, eigenlijk wel iets dat kan vallen? Ik krijg de indruk dat als de modus operandi onenigheid is, je heel erg lang aan kan blijven modderen.
Wimpers. Ook woke.
Inderdaad. Het extraparlementaire experiment, enkel bedoeld om een extremistische minderheid in het zadel te hijsen, is gewoon mislukt.
Orbit of C/2025 D5 (PANSTARRS)
New, but faint #comet confirmed: C/2025 D5 (PANSTARRS)
It will reach perihelion in May of this year at 2 au from the sun.
See MPEC 2025-E99 and astro.vanbuitenen.nl/comet/2025D5
#CometWatch
Orbit of C/2025 E1 (PANSTARRS)
New #comet confirmed: C/2025 E1 (PANSTARRS)
Perihelion will occur in September of 2026 at 4 au from the sun.
See MPEC 2025-E58 and astro.vanbuitenen.nl/comet/2025E1
#CometWatch
Het enige waar hij goed in is, is zichzelf de eer en verdiensten van andermans werk toe-eigenen. Hij is een ordinaire dief.
Orbit of P/2025 D4 (ATLAS)
New periodic #comet confirmed: P/2025 D4 (ATLAS)
Perihelion was on Feb 14. It currently has an orbital period of 26.6 years.
See MPEC 2025-D235 and astro.vanbuitenen.nl/comet/2025D4
#CometWatch
P/2025 D3 (PANSTARRS) approached Jupiter to 0.6 au by the end of 2021, reducing its orbital period by a year, and its perihelion distance by 0.47 au.
Orbit of P/2025 D3 (PANSTARRS)
New Jupiter-family #comet confirmed.
It has an orbital period of 7.9 years. Last perihelion occurred in July of 2024.
See MPEC 2025-D211 and astro.vanbuitenen.nl/comet/2025D3
#CometWatch
Orbit of A/2025 A7
New object on a cometary orbit confirmed: A/2025 A7
It is on a retrograde (i=134°) orbit, reaching perihelion on March 28 at 2.9 au from the sun.
See MPEC 2025-D151 and astro.vanbuitenen.nl/comet/2025A7
#CometWatch
