
Radio astronomer at MPIfR/Effelsberg observatory, Python programmer, Spectrum manager, amateur astro photographer; #EBHIS, #HI4PI
Chair of the Committee on Radio Astronomy Frequencies #CRAF

Heute ist der 2. Digital Independence Day. Wir haben in unserem Haushalt die Email-Accounts von Google zu Posteo umgezogen. Es war nicht wenig Arbeit - insbesondere weil wir geteilte Kalender nutzen. Dennoch ein längst überfälliger Schritt! #didit #dutgemacht
Danke an den wunderbaren @marcuwekling und den @ccc für die sehr lustige Motivationshilfe:
https://media.ccc.de/v/39c3-die-kanguru-rebellion-digital-independence-day
Wie lange wollt Ihr noch Eure Emails von Google mitlesen lassen!?! 😉
Mehr Infos unter: https://di.day/

Marc-Uwe Kling liest neues vom Känguru vor. Vielleicht auch was von Elon und Jeff on Mars. Und dann ruft das Känguru zum Digital Indepen...
Wir machen mit: beim 2. #DigitalIndependenceDay diesen Sonntag. Ab 14 Uhr in unseren Räumen in der Heliosstr. 6a in #Köln #Ehrenfeld.
https://termine.di.day/events/64efbccd-61bd-4798-93ba-0b3301cc76a8
Am ersten Sonntag jedes Monats unterstützt euch der Chaos Computer Club Köln, die digitale Unabhängigkeit wiederzuerlangen. Von Windows zu Linux, von Whatsapp zu Signal, der Umstieg ist möglich.
Dear @EUCommission, the digital omnibus is the opposite of what we need.
In the era of hybrid warfare, we must make it HARDER to WEAPONISE our digital infrastructure against us — not EASIER.
If this result holds up, it’s potentially big: https://www.nature.com/articles/s41558-025-02481-0
In short, it implies that #LightPollution is decreasing the efficiency with which #plants remove carbon from the atmosphere. It concludes that artificial light at night increases “#ecosystem respiration” (plants, microbes, and animals releasing carbon dioxide through their activity and growth), but there is no corresponding increase in #photosynthesis.
The result is that plants exposed to ALAN emit more #carbon than they absorb from the #atmosphere. The authors write: “Our findings show that ALAN disrupts the fundamental energetic constraints on ecosystem metabolism, warranting the inclusion of light pollution in global change and carbon–climate feedback assessments.”
The authors combine light intensity data with eddy covariance observations from 86 sites to show that artificial light at night increases ecosystem respiration and alters carbon exchange, with impacts shaped by diel cycles and seasonal dynamics.
#MPIfR:
"
Deutschland bekräftigt Engagement für SKAO mit Unterzeichnung eines Großauftrags
"
".. in Mainz ansässige Unternehmen OHB Digital Connect wird 86 hochempfindliche Empfänger für das SKA-Mid-Radioteleskop liefern,.."
https://www.mpifr-bonn.mpg.de/mitteilungen/2025/17
3.11.2025
#Astronomie #Band5 #DZA #Mainz #MeerKAT #OHB #OHBDigitalConnect #Radioastronomie #SKAO #VdR
Good morning. Starlink has now launched more than TEN THOUSAND satellites into orbit. Nearly 1400 have already been burned up in the atmosphere so far.
Here's a "lovely" image from my Kuiper Belt discovery program with dozens of satellite streaks in a 3 hour stacked exposure from CFHT. This was from 2022, when there were thousands fewer satellites... This is dumb.
Image credit: P. Cowan/W. Fraser/S. Lawler/CLASSY Survey Team
(The small streaks that are similar lengths are actually asteroids!)