Tag: Astronomie
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Excursion to the GEO600 gravitational wave detector near Hanover on October 28, 2025
What was supposed to be 1.5 hours turned into almost 2.5 hours. This wasn't time dilation as predicted by Einstein's theory of relativity. But in a broader sense, it did have something to do with Einstein, because we at kosmos-os visited the GEO600 gravitational wave detector near Sarstedt, close to Hanover, on November 28, 2025.
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Reproducibility of transit light curves for the detection of exoplanets
The transit light curves of five exoplanets are evaluated for their reproducibility. The parameters examined are the indirectly measured radius of the respective planet and the temporal center of the transit. After a detailed treatment of the individual exoplanets, a summary of the measurements shows that the respective planetary radius was measured reproducibly in 10 of 12 measurements.
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Visit to the Physikalisch-Technische Bundesanstalt in Braunschweig on 7 July 2025
Meter, Kilogramm, Sekunde, Ampere, Mol, Kelvin und nicht zu vergessen Candela. Das sind die Messgrößen des Internationalen Einheitensystems (SI – Système international d’unités). Fast jede davon ist einem Astronomen schon einmal begegnet. Wenn man das bedenkt, weiß man, warum für uns von kosmos-os die Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig als eine der international bedeutendsten Institutionen…
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Excursion to the Olbers Gesellschaft Bremen on April 22, 2025
Ursprünglich hatten wir nur die Teilnahme am Vortrag „Die Vermessung des unsichtbaren Universums mit Hilfe von Gravitationswellendetektoren“ bei der Olbers-Gesellschaft e. V. in Bremen geplant. Da wir wussten, dass der Vortrag in dem Gebäude der Hochschule Bremen stattfinden würde, in dem auch die Walter-Stein-Sternwarte beherbergt ist, hatten wir angefragt, ob eine kurze Besichtigung der traditionsreichen…
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Mirage in the Sky
The observation of the three quasars Q0957+561, RXJ0921+4529, and SDSS J1029+2623 is described. In these cases, multiple images are generated by galaxies or galaxy clusters in the foreground, which act as gravitational lenses. It is shown that these images can be resolved even at an urban observation site.
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Big, black, hot and with a short life expectancy
The measurement of the transit light curve of the exoplanet Wasp-12b is described. This exoplanet is special in many ways. The large number of existing transit light curves, including our own measurements, enables spectacular predictions about the lifespan of the exoplanet.
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Measurement of the transit light curve of the exoplanet TOI-2570 b
The measurement of the transit light curve of the exoplanet TOI-2570 b, which was only discovered in 2022, is described. The brightness of the parent star, which is located in a very dense field of stars, was determined in 148 images in relation to comparison stars. The result agrees very well with the data known so far.
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Visit to my observatory
On Wednesday, October 16th, 2024, a volunteer from the Neue Osnabrücker Zeitung (NOZ) and a photographer were with me to report on my hobby of astronomy, the comet C/2023 A3 (Tsuchinshan-ATLAS) and the “supermoon”. The article should appear in the online edition of NOZ.
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All good things come in threes
The sun has reached its maximum in its eleven-year activity cycle. For the third time this year, northern lights could be observed from Central Europe. A short excursion into the personal experiences of some kosmos-os friends at the Northern Lights on October 10, 2024 is presented.
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Excursion to the Effelsberg radio telescope
You have to drive very far from Osnabrück to get to the end of the visible universe or - to be more precise - to get to where you can "see" almost to this end. So six astro friends from kosmos-os set off from Osnabrück on Saturday, September 21st, 2024 at 7 a.m.
