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Lt Nono

@ltno2.bsky.social

Northern hemisphere astronomy enthusiast and Islay Single Malt lover. Cats shall one day rule the world. 🔭🥃 🐈 https://www.astrobin.com/users/Ltno/ Alumnus Université Côte d'Azur/OCA 🔭🌌 So long and thanks for all the fish...

1015 Posts2030 Follower223 Folgt
Dr. Miguel Montargès 🔭✨📡@astromiguelm.bsky.social · last wk.

Nous avons observé Bételgeuse B avec le Very Large Telescope Européen ! Et cette fois, c'est une détection à 6 sigma !

Ciel & Espace@cieletespace.bsky.social · last wk.

Bételgeuse est une étoile double ! Sa compagne lui tourne autour en six ans et a été observée avec le Very Large Telescope au Chili. Voilà qui promet de fascinantes futures études... https://www.cieletespace.fr/article/le-vlt-confirme-la-presence-d-un-jeune-soleil-autour-de-betelgeuse

ESO@eso.org · last wk.

The conclusion of a century-long quest 😲 Our VLT obtained firm evidence that Betelgeuse, a red supergiant star in the Orion constellation and one of the most famous stars in the night sky, is not alone! 🔭 🧪 1/4

A collage of various astronomical images. The background image shows a wide view of a starry night sky, with blue lines connecting the stars of the Orion constellation. An inset image zooms into the star Betelgeuse, showing its orange surface. A second inset shows a bright companion next to the star. Image by ESO/M. Montargès et al. Background: N. Rissinger (skysurvey.org).
Lt Nono@ltno2.bsky.social · 2w ago

Averaging individual frames and using a rejection algorithm can get rid of those pesky satellite trails to get a nice #astrophotography pic... Here's NGC2655 without pollution, shot over several nights from my backyard. What do you see @kat-astro-bot.bsky.social ?

Astrophotography of thee active galaxy NGC2655 shot from a backyard in France, with a 200mm f/4 Newtonian and a Poseidon-M monochrome astronomy camera using LRGB filters. 12h40 of integration time in total.
Lt Nono@ltno2.bsky.social · 2w ago

Here is roughly 8h of luminance data (over three nights this past week) with this #astrophotography of NGC2655 done without any rejection algorithm. There's a slight satellite trail pollution don't you think? This is sad, knowing that some companies are willing to make things even worse 😢.

Satellite trails shown over 8 hours of luminance exposures spread over three nights while trying to capture the galaxy NGC2655.
Lt Nono@ltno2.bsky.social · 2w ago

Here is roughly 8h of luminance data (over three nights this past week) with this #astrophotography of NGC2655 done without any rejection algorithm. There's a slight satellite trail pollution don't you think? This is sad, knowing that some companies are willing to make things even worse 😢.

Satellite trails shown over 8 hours of luminance exposures spread over three nights while trying to capture the galaxy NGC2655.
Thomas Fuchs@thomasfuchs.at · 3w ago

A thing about the "AI" debate in science is that I almost never see anyone asking, "well sure LLMs or whatever can be useful sometimes—but what if we put all the money spent on 'AI' into hiring more humans, furthering other technologies & invest into research helping scientists science better"

David ALBERTO@astrolabe-science.fr · 2mo ago

🔭 AltZero studio sells astronomy-related posters. Among others, the June Solstice poster, a very beautiful diagram showing the Sun's path on the celestial sphere on June 21. Each orange line is for a given latitude, from -90 to 90° every 5°. 1/3 🧵

The 'June Solstice' poster, on an ivory background. Main element is a circular diagram in 2 parts, upper orange, lower blue, and a set of orange lines, all tangent to a small circle. Credit AltZero studio.
Bernd Flachsbart@bflachsbart.bsky.social · 2mo ago

NGC 4236 captured from my dark site in southern France on three nights in April 🇫🇷😊🔭 This was shot on the EdgeHD 8 with Hyperstar at f/2 for a total integration time of 11.5 hours in RGB+Ha using a QHY183C cam. The Ha data was applied to enhance the star forming regions. #Astrophotography

NGC 4236 is a barred spiral galaxies located in the constellation Draco. It’s about 11 million light years away from Earth.
JDS@jdsoubeyran.bsky.social · 2mo ago

A quick processing of the beautiful Sh2-124 nebula (showing part of the larger Sh2-124 region) from last Saturday’s imaging session. 🔭 About 70×180s subs. Thanks to @ltno2.bsky.social for the great tip on boosting the Hα emission through the luminance channel.

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Lt Nono@ltno2.bsky.social · 2mo ago

Using the luminance channel of this image I humbly contributed to, I cross-matched the sources using Sextractor and TopCat with the Milliquas catalogue. Looks like we have some #Quasars, and far away too (FlatLambdaCDM model with H0=70 km/s/Mpc and a 30% matter density). #cosmology #astrophotography

Astrophotography around Keenan's system (NGC5218 and NGC 5216), with annotated Quasars, their redshift and their distance using a FlatLambdaCDM model.
Lt Nono@ltno2.bsky.social · 2mo ago

With my #astrophotography buddies Jeff, Alex, Franck & Stéphane we stacked somewhere close to 1000 frames per LRGB channel on Keenan's system (2 interacting galaxies) + a ton of galaxies in the bg. Can you solve this one @kat-astro-bot.bsky.social ? Technical details: www.astrobin.com/ewm0jd/

Astrophotography of Keenan's system featuring the galaxies NGC5216 and NGC5218 sharing matter and tidal streams. This image is the result of the integration of 36 hours of data collected through 4 different setups, using monochrome and OSC cameras.