mastodon.zunda.ninja is one of the many independent Mastodon servers you can use to participate in the fediverse.
Zundon is a single user instance as home of @zundan as well as a test bed for changes of the code.

Administered by:

Server stats:

1
active users

#astronomy

0 posts0 participants0 posts today

When your mirror gets dirty at home, you can just grab a cloth and some spray to clean it. But what about the ultra-precise, reflective mirrors of telescopes? 🤔

Things can get a bit more complex. This image shows you part of the cleaning process for the main mirror of the ESO 3.6-metre Telescope at La Silla Observatory, #Chile.

Discover how it's done: eso.org/public/images/potw2524

Do you want to learn more about how we clean telescope mirrors? Then check out this blog post: eso.org/public/blog/exploding-

📷 A. Silber/ESO

Astronomers may have found evidence of still-forming planets hidden somewhere in this close-up of the star RIK 113, taken with our Veery Large Telescope in #Chile

This and previous data taken with the Atacama Large Millimeter/submillimeter Array suggest that the disc around the star may be shaped by hidden planets.⁠

The data show the presence of gaps and spiral features, which may have been caused by forming planets.⁠

Learn more: eso.org/public/images/potw2523

📷 ESO/C. Ginski et al.

The same side of the Moon always faces Earth, but not in exactly the same way. Due to its tilted axis and elliptical orbit, we see about 59% of its surface over time. This simulation compresses a year into 60 seconds, making the Moon's apparent wobble, called libration, clearly visible.

Credit: NASA's Scientific Visualization Studio

"From this distant vantage point, the Earth might not seem of any particular interest. But for us, it's different. Consider again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every 'superstar,' every 'supreme leader,' every saint and sinner in the history of our species lived there -- on a mote of dust suspended in a sunbeam."

Continued thread

FWIW this was one of the trickier pieces. The internal hardware fit was really tight, and I had to study up on optics - in particular light path physics to squeeze it all in. Many builds with biconvex and biconcave lenses of different cuts, different configurations, before it had the feel of gazing upon a real starscape. At that short distance, only a pricey sub 50mm AMOLED display would yield near no artifacts from ray angles as they came through the first lens. Learned a bunch

New Instance , new (ish) #Introduction
Ex mainframe (IBM) Storage Manager / Installations bod.
Now part time hermit with #Depression, #ActuallyAutistic
Channel #MarvinTheParanoidAndroid
Massive #TerryPratchett & #DouglasAdams fan.
Love #Scifi #Fantasy #Reading #Movies
Interested in #Physics #Astronomy #Photograpy but rubbish at all of them.
Believe in #ClimateChange #BigBangTheory
Lean to the left & am definitely #Woke
Will drive you insane if you let me !🤣

Humaning is hard , so am Squirrel.