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Gideon van Buitenen

@vanbuitenen.nl
238 followers 152 following 129 posts

Amateur astronomer | Musician | Software developer Author of astro.vanbuitenen.nl Dutch Comet Section MPC Observatory G06

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Gideon van Buitenen @vanbuitenen.nl · 13/09/2026
The speed at which AI models operate gives the impression they are efficient. They are not! Behind each of their successes hides a mountain of failures. This costs us enormous amounts of energy. Yes, AI makes its mistakes quicker, but it is by no means more efficient than any human being would be.
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Gideon van Buitenen @vanbuitenen.nl · 13/09/2026
The tech imperialists love and feed the super AI naritive. It keeps the financial pyramide scheme on which this empire is built standing just a bit longer, allowing them to consolidate even more power. darioamodei.com/post/we-must...
darioamodei.com
Dario Amodei — We Must Pace the Frontier
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 10/07/2026
US FCC: “let’s do a consultation on how the community feels about this” Community: “we hate it, don’t do it, it’s real bad, this will impact a lot of people — astronomers, biodiversity, Indigenous communities, more” x 1800 responses FCC: “lol, we don’t care. APPROVED.”
But to expand the technology, Reflect Orbital envisions operating over 50,000 satellites by 2035, effectively surrounding the Earth with a fleet of mirrors. The proposal has faced stiff pushback from environmental groups and astronomers concerned that the satellites will unleash intrusive light pollution. The opposition has been so strong that the FCC received over 1,800 public comments on the application, many of them objecting to Reflect Orbital’s plan for Earendil-1.
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Huub Eggen @huubeggen.bsky.social · 15/07/2026
Het Amerikaanse bedrijf www.reflectorbital.com heeft van de Amerikaanse toezichthouder op het gebruik van radiofrequenties voor satellietcommunicatie FCC toestemming gekregen voor de lancering van een testsatelliet met een grote spiegel docs.fcc.gov/public/attac... Een rampzalig plan. 1/2
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Gideon van Buitenen @vanbuitenen.nl · 11/07/2026
Unbelievable. This is insanity on so many levels! My only consolation is that I did formally object to this ridiculous and dangerous proposal when I had the chance. I hope this disaster can still be averted somehow. I wish I knew how to push back on it now that it has been approved.
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WuTangIsForTheChildren @wutangforchildren.bsky.social · 12/06/2026
Congratulations to Elon on becoming the world’s first trillionaire from London 🔥
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Gideon van Buitenen @vanbuitenen.nl · 27/02/2026
Two satellite proposals are threatening the night sky. Learn here how to act: darksky.org/news/two-sat...
darksky.org
Satellite proposals threaten the night sky
In the United States, the Federal Communications Commission (FCC), the agency responsible for authorizing satellite launches and operations…
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Marco Langbroek @marcolangbroek.bsky.social · 26/02/2026
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.
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Terry Lovejoy @cometguy.bsky.social · 14/02/2026
Timelapse over 4 weeks (Jan 19 - Feb 13) showing the steady brightening of Comet MAPS as it dives towards the sun.
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Gideon van Buitenen @vanbuitenen.nl · 11/02/2026
C/2026 A1 (MAPS) on Feb. 10 Details in the image. #CometWatch
C/2026 A1 (MAPS) on Feb. 10
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Gideon van Buitenen @vanbuitenen.nl · 18/01/2026
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
Possible Kreutz comet 6AC4721
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Marco Langbroek @marcolangbroek.bsky.social · 12/01/2026
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.
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Gideon van Buitenen @vanbuitenen.nl · 28/12/2025
Interstellar #comet 3I/ATLAS as imaged on December 25th.
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Héctor Socas @hsocasnavarro en Twitter @hectorsocas.bsky.social · 13/11/2025
"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-...
tinieblasyestrellas.blogspot.com
The fallacies behind the cult of Loeb
How media hype and misunderstanding fuel pseudoscientific fascination  Introduction The word “cult” is used here in the sense given by...
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Maik Meyer ☄️ @comethunter.de · 28/04/2025
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
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."
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Maik Meyer ☄️ @comethunter.de · 17/04/2025
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
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Maik Meyer ☄️ @comethunter.de · 09/04/2025
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...
cbat.eps.harvard.edu
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Gideon van Buitenen @vanbuitenen.nl · 09/04/2025
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
Orbit of C/2025 F2 (SWAN)
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Gideon van Buitenen @vanbuitenen.nl · 06/03/2025
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 D5 (PANSTARRS)
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Gideon van Buitenen @vanbuitenen.nl · 04/03/2025
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
Orbit of C/2025 E1 (PANSTARRS)
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Gideon van Buitenen @vanbuitenen.nl · 28/02/2025
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
Orbit of P/2025 D4 (ATLAS)
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Gideon van Buitenen @vanbuitenen.nl · 27/02/2025
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 P/2025 D3 (PANSTARRS)
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Gideon van Buitenen @vanbuitenen.nl · 25/02/2025
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
Orbit of A/2025 A7
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Gideon van Buitenen @vanbuitenen.nl · 25/02/2025
New periodic #comet confirmed: P/2025 D2 (PANSTARRS) The current orbital elements (based on 13 observations dating back to Feb 4) give perihelion in Jan 2028 at 7.2 au from the sun, and a 29.7 year orbital period. See MPEC 2025-D149 and astro.vanbuitenen.nl/comet/2025D2 #CometWatch
Orbit of P/2025 D2 (PANSTARRS)
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Gideon van Buitenen @vanbuitenen.nl · 24/02/2025
New, distant #comet confirmed: C/2025 D1 (Groeller) The comet is on a highly inclined orbit, reaching perihelion in May 2028 at a record distance of 14.1 au from the sun! Pre-discovery observations are dating back to June 2018. See MPEC 2025-D83 and astro.vanbuitenen.nl/comet/2025D1 #CometWatch
Orbit of C/2025 D1 (Groeller)
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Gideon van Buitenen @vanbuitenen.nl · 24/02/2025
New returning #comet confirmed: C/2025 A6 (Lemmon) It approaches on a retrograde orbit and may reach mag 10 in October of this year. Perihelion occurs in November. The current orbital elements imply a ~1386 year orbital period. See MPEC 2025-D55 and astro.vanbuitenen.nl/comet/2025A6 #CometWatch
Orbit of C/2025 A6 (Lemmon)
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Arie Nouwen @adrianusv.bsky.social · 23/02/2025
Teken de petitie voor het behoud van Volkssterrenwacht Mercurius www.astroblogs.nl/2025/02/23/t...
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Joshua Reed Eakle 🗽 @joshuaeakle.com · 21/02/2025
Steve Bannon, after calling for Trump to be President for life, did a Nazi salute on stage at CPAC. Nazism has officially taken over the GOP. The few remaining conservatives have a choice: either leave the party and obstruct it—or choose to be complicit.
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Tzadik @tomtatum.bsky.social · 16/02/2025
"What started as US election interference has now spread to other countries. We're currently doing the same thing in Germany and other European nations." WE MUST BAN META AND X, AND INCRIMINATE MUSK AND ZUCKERBERG Do not just like, SHARE EVERYWHERE theconcernedbird.substack.com/p/elon-musks...
theconcernedbird.substack.com
Elon Musk's and X's Role in 2024 Election Interference
The confessions of a concerned bird.
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Ryan Goodman @rgoodlaw.bsky.social · 11/02/2025
"The enormity of Defendants’ actions cannot be overstated." Please read this paragraph in court case filed on Monday.⬇️ Details the devastating, immediate and far-reaching, real-world impacts of the #USAID funding freeze. From famine to counternarcotics and counter-terrorism programs, more.
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Gideon van Buitenen @vanbuitenen.nl · 10/02/2025
New Jupiter-family #comet confirmed: P/2025 C1 (ATLAS) The current orbital elements give it a period of 8.8 years with perihelion on Feb. 4 See MPEC 2025-C158 and astro.vanbuitenen.nl/comet/2025C1 #CometWatch
Orbit of P/2025 C1 (ATLAS)
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Gideon van Buitenen @vanbuitenen.nl · 10/02/2025
New, distant #comet confirmed: C/2025 B2 (Borisov) It will reach perihelion in September of 2026 at 8.3 au from the sun. It has a highly inclined (91.8°) orbit. See MPEC 2025-C153 and astro.vanbuitenen.nl/comet/2025B2 #CometWatch
Orbit of C/2025 B2 (Borisov)
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Ko van Huissteden @kovanhuissteden.bsky.social · 08/02/2025
Star link killing the ozone layer.

First generation (Gen1) Starlink satellites are being retired to make way for newer models. "More than 500 of the 4700 Gen1 Starlinks have now reentered," 

When Starlinks reenter, they disintegrate before hitting the ground, adding metallic vapors to the atmosphere. 

In February 2023, NASA flew a WB-57 aircraft 60,000 feet over Alaska to collect aerosols. 10% of the particles contained aluminum and other metals from the "burn-up" of satellites.

What we're observing is a giant uncontrolled experiment in atmospheric chemistry. The demise of just one Gen1 Starlink satellite produces about 30 kilograms (66 pounds) of aluminum oxide, a compound that eats away at the ozone layer. A new study finds these oxides have increased 8-fold between 2016 and 2022, and the recent surge is increasing the pollution even more. 

https://spaceweather.com/archive.php?view=1&day=06&month=02&year=2025
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@Marcel @elsschot.bsky.social · 07/02/2025
Weinig verrassend dit....😖 www.nrc.nl/nieuws/2025/...
nrc.nl
Bij de VVD komen de bezwaren tegen een vuurwerkverbod vooral vanuit de vuurwerkbranche zelf
Vuurwerkverbod: Voordat de VVD op 19 februari in de Tweede Kamer debatteert over een algemeen vuurwerkverbod, wil de partij tijdens een debatavond horen van haar leden. De vuurwerkdiscussie blijkt een...
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Peter🪶 @tjissepeter.bsky.social · 06/02/2025
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Gideon van Buitenen @vanbuitenen.nl · 06/02/2025
Sturmabteilung
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Merijn Oudenampsen @merijnoudenampsen.org · 04/02/2025
Met haar ‘agenda voor werkend Nederland’ zet de VVD de middenklasse en uitkeringsgerechtigden tegen elkaar op. Mijn column voor de @groene.nl van deze week.
groene.nl
Met haar ‘Agenda voor werkend Nederland’ zet de VVD de middenklasse en uitkeringsgerechtigden tegen elkaar op
Vorige week presenteerde de VVD de ‘Agenda voor werkend Nederland’. De partij zet hiermee een nieuwe koers in, die doet terugdenken aan Mark Rutte.
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Gideon van Buitenen @vanbuitenen.nl · 04/02/2025
Elon Musk's DOGE illegally obtained access to the US Treasury payment system. This may very well be the largest and most dangerous data leak the world has ever seen.
c-span.org
Senate Democrats on Elon Musk Getting Access To Treasury Payment System
Senate Minority Leader Chuck Schumer (D-NY) held a news conference on the Trump administration giving Elon Musk, head of the newly created Department of Government Efficiency (DOGE), access to the Tre...
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Gideon van Buitenen @vanbuitenen.nl · 04/02/2025
When DOGE was introduced, I posted it was the most dangerous development I've seen in my lifetime. Things are taking shape now as they attempt to bypass congress and take over vital parts of US government. This attempted coup is not just a US internal issue, as it could destabalize the entire world.
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Gideon van Buitenen @vanbuitenen.nl · 04/02/2025
This is outrageous.
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Maarten Hopman @maartenhopman.bsky.social · 03/02/2025
Vandaag heeft de allerrijkste man ter wereld 60 miljard dollar aan humanitaire hulp voor de allerarmsten ter wereld stopgezet. Voedselhulp, gezondheidszorg, rampenhulp, allemaal per direct gestopt. Het is niet meer uit te leggen als 'pestgedrag'. Dit is spelen met mensenlevens. Misdadig.
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Gideon van Buitenen @vanbuitenen.nl · 30/01/2025
Misleiding komt vaak in de vorm van het verheffen van één deugd boven andere. Vrijheid van meningsuiting staat niet boven tolerantie en medeleven. Hard werken staat niet boven zorg voor de medemens die dat niet kan, of boven zorg voor natuur. Het is niet of/of maar en/en. Nuances doen er toe.
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DrJHAmsterdam @drjohamsterdam.bsky.social · 29/01/2025
Het gebeurt weer. Het fascisme rukt op. Het wordt in kleine porties opgediend. Totdat de maag het niet meer kan verwerken. Maar dan is het te laat. Stefan Zweig waarschuwde destijds tevergeefs. Kunnen we het nu keren? U bent er zelf bij.
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DrJHAmsterdam @drjohamsterdam.bsky.social · 28/01/2025
Onder aanvoering van de partij van Pieter Omtzigt worden chronisch zieke mensen in de kou gezet. De huidige regels voor arbeidsongeschikten zijn zo ingewikkeld dat we het geld maar van de zieken afpakken. VVD vindt het natuurlijk prima.
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Johanna Pruis @johannapruis.eurosky.social · 10/01/2025
misschien was dit wel het beste van 2024 #vijfvoortwaalf @pieterderks.bsky.social #pieterderks
youtu.be
Pieter Derks - Vijf voor twaalf
YouTube video by Pieter Derks
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Benny From The Block. @blockbenny.bsky.social · 28/01/2025
Politie: een #vuurwerkverbod zou ons helpen. Hulpdiensten: een vuurwerkverbod zou ons helpen. Burgemeesters: een vuurwerkverbod zou ons helpen. VVD: eerst eens kijken wat we kunnen doen aan bescherming. Dan sta je niet achter hulpdiensten maar laat je ze juist in de kou staan.
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Reinier van den Berg @reiniervdberg.bsky.social · 28/01/2025
Zullen we dan de gehele Tweede Kamer fractie van de #VVD gebieden, om een nachtdienst te draaien bij politie, ambulance of brandweer in de eerste volgende 'feestelijke' Nieuwjaarsnacht? Ze mogen kiezen bij welke dienst, maar enig ander excuus wordt niet getolereerd. #vuurwerkverbod
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Gideon van Buitenen @vanbuitenen.nl · 28/01/2025
Het viel te verwachten van dit weekdierenkabinet dat alleen op durft te komen voor het recht van de grootse bek. Ik vlucht het land maar uit volgend jaar. #vuurwerkverbod nos.nl/artikel/2553...
nos.nl
VVD blijft tegen algeheel vuurwerkverbod, 'eerst uitwassen aanpakken'
Het zag ernaar uit dat de regeringspartij gevoelig was voor het pleidooi van de politie om een einde te maken aan de vuurwerktraditie.
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Gideon van Buitenen @vanbuitenen.nl · 26/01/2025
Next step in the authoritarian playbook: Trying to change the constitution to get or keep power. Others who did this include: Julius Caesar, Napoleon, Louis XIV, Ivan the Terrible, Ortega, Chavez, Maduro, Putin, etc. It is so blatantly obvious. I just don't get how people can vote for this.
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Gideon van Buitenen @vanbuitenen.nl · 24/01/2025
New, but faint #comet confirmed: C/2025 B1 (PANSTARRS) It will reach perihelion in June of this year at poor elongation. See MPEC 2025-B77 and astro.vanbuitenen.nl/comet/2025B1 #CometWatch
Orbit of C/2025 B1 (PANSTARRS)
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