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#rubin

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AkaSci 🛰️

The Vera C. Rubin Observatory Simonyi Survey Telescope consists of 3 aspheric mirrors: an 8.4-m primary mirror M1, a 3.5-m convex secondary mirror M2, and a 5.0-m tertiary mirror M3.

The primary and tertiary mirrors are fabricated from a single piece of glass.The secondary mirror (M2) is the largest convex mirror ever made.

Note the location of the 3 ton LSST camera perched below the high secondary mirror.

lsst.org/about/tel-site/optica
#Rubin #astronomy
6/n

1. Schematic of the mirror assembly and optical path of the Rubin Observatory. The hole in the tertiary mirror is used to mount equipment for maintaining precise control of Rubin Observatory's optical alignment. 2. Graphic of the assembled telescope.
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AkaSci 🛰️

The focal plane of the Vera C. Rubin telescope consists of 189 4kx4k charge-coupled device (CCD) sensors, arranged in a total of 21 3-by-3 square arrays. The system is cooled to about -100 °C to minimize noise.

The 3.5° field of view of the 64 cm wide array is 40 times the area of the full moon in the sky.

Camera Data Rates: ~3.2 GBytes/sec peak raw data 😲
1 pixel = 16 bits (raw)
Pixels: 3.2 billion
Detector read-out time: 2 sec

flickr.com/photos/slaclab/with
www6.slac.stanford.edu/lsst
#Rubin
5/n

1. Pic othe LSST camera focal plane and detectors during assembly and testing Credit: Jacqueline Orrell/SLAC National Accelerator Laboratory Source: https://www.flickr.com/photos/slaclab/50212763208/ 2. Schematic of LSST focal plane and detectors Source: https://www6.slac.stanford.edu/lsst
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Daniel Fischer

The #Rubin Observatory has achieved a major milestone with the installation of the LSST Camera on the telescope, seen in the timelapse youtube.com/watch?v=RmRwhZ3k8- with more visuals in noirlab.edu/public/news/noirla - with the final optical component in place, Rubin enters the last phase of testing before capturing long-awaited and highly-anticipated First Look images, followed by the start of the Legacy Survey of Space and Time (LSST).

YouTubenoirlab2511aBy NOIRLabAstro
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Daniel Fischer

How the life of Vera #Rubin was rewritten on the website of the major observatory named after this celebrated female astronomy role model: on the left what it looked like last December, from web.archive.org/web/2024122217, on the right the current version on rubinobservatory.org/about/ver. One whole paragraph is now missing, and the final one was modified. Just one of many science-related websites run by the U.S. government vandalized in recent days. Trying to rewrite history ... 1984 is now. :-(

The original text.
The current censored text
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zahl

If you're nervously watching the #LA fires, and wondering what kind of fireproofing you could do personally, there's actually a decent amount you can do via landscaping. See native #chaparral plants are cool in that they either don't catch fire easily or they go up in flames quickly. If you plant the first set, and follow other fire rules, you might save your house. Greg #Rubin has the research, mostly SoCal based. Last I heard, he hasn't lost a house yet.

ebcnps.org/events/using-native

ebcnps.orgUsing Native Plants for Fire Resistant Landscapes
#nativeplants
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Putin's IBS

December 17. The #Rubin rescue vessel was sent to the emergency tanker to tow it to the port.

Before that, on the night of December 16-17, a distress signal was given by the #Volgoneft_109 tanker, which was near the port of #Kavkaz with 4000 tons of fuel oil on board The ship's captain reported a breach of the seal of the fourth cargo tank and leakage of fuel oil, which got into the ballast tank.

On December 15, two tankers – #Volgoneft_212 and #Volgoneft_239 – crashed in the #Kerch_Strait.

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Daniel Fischer

So U.S. spy agencies harrass astronomers running sky surveys like #PanSTARRS or #Rubin and try to censor their images to keep some #satellites and their orbits secret: theatlantic.com/science/archiv or msn.com/en-us/news/technology/ - but doesn't the UN Convention on Registration of Objects Launched into Outer Space unoosa.org/oosa/en/ourwork/spa require anyone launching something into orbit (essentially humanity's commons) to publicly disclose the orbit and other details? Something doesn't compute here at all ...

The Atlantic · When a Telescope Is a National-Security RiskBy Ross Andersen
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