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#rubin

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Continued thread

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

Continued thread

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

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. :-(

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
Replied in thread

Yarvin had given people a way to articulate a notion that somehow felt subversive to say out loud in America
—that history was headed in the wrong direction.

“Somebody said something earlier that captured it for me,” Laurenson said,
just before they had to leave to go to a slightly hush-hush private dinner with Vance and a few others.

“They said, ‘You can be here and know you’re not alone.’ ”

People at the conference seemed excited about being in a place where they weren’t alone.

I skipped most of the talks
—which ranged from sessions about confronting the threat of China
to the liberal influence on pop culture
to “Worker Power.”

Hawley gave a keynote on the “assault on the masculine virtues,”

and Cruz offered up a traditional stump speech, evoking Reagan and saying he thought conservatives would soon prevail at the ballot box.

“I’m pretty sure a lot of the 20-somethings rolled their eyes at that,” Yarvin said to me afterward with a smirk.

The 20-somethings had a bigger vision.

Up by the bar every night, hordes of young men, mostly, would descend to drink and bear-hug and spot favorite podcasters and writers.

You could see #Dave #Rubin, and #Jack #Murphy, who hosts a popular New Right–ish YouTube channel
and is trying to build a fraternal group of men who believe in
“positive masculinity”
that he calls the "Liminal Order. "

Pretty much everyone had the same trimmed beard and haircut
—sides buzzed short, the top longer and combed with a bit of gel to one side.

I didn’t see a single Black person under the age of 50,

though there were attendees of South Asian and Middle Eastern descent.

In March, the journalist #Jeff #Sharlet
(a Vanity Fair contributing editor who covers the American right)
tweeted that the
🔸“intellectual New Right is a white supremacist project designed to cultivate non-white support,” 🔸

and he linked it to resurgent nationalist and authoritarian politics around the world:

🔸“It’s part of a global fascist movement not limited to the anti-blackness of the U.S. & Europe.” 🔸

Yet♦️ many on the New Right seem increasingly unfazed by accusations that they’re white nationalists or racists. ♦️

Masters in particular seems willing to goad commentators,
believing that the ensuing arguments will redound to his political advantage:

“Good luck [hitting] me with that,”
Masters told the podcaster Alex Kaschuta recently,
🔹arguing that accusations of racism had become a political bludgeon used to keep conservative ideas outside the political mainstream. 🔹

“Good luck criticizing me for saying critical race theory is anti-white.”

But for all the chatter of looming dystopia, no one I spoke to raised one of the most dystopian aspects of American life:
our vast apparatus of prisons and policing.

Most people seemed more caught up in fighting what they perceived as the cant and groupthink among other members of the political media class,

or the hypocrisy of rich white liberals who put up Black Lives Matter signs in front of multimillion-dollar homes,

than they were with the raw experience that has given shape to America’s current racial politics.

Continued thread

The focal plane of the Vera C. Rubin telescope consists of 189 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

rubin.canto.com/v/gallery/albu
www6.slac.stanford.edu/lsst
#Rubin
4/n

Continued thread

The Rubin Legacy Survey of Space and Time LSST Camera is the largest camera ever constructed for astronomy. It is a large-aperture, wide-field optical camera, capable of viewing light from the near ultraviolet to near infrared wavelengths.

Length: 3.73 m
Height: 1.65 m
Weight: 2,800 kg
Pixels: 3.2 billion
Wavelength: 0.32–1.06 μm
Filters: 6 (u-g-r-i-z-y)
Field of view = 3.5° (moon = 0.5°)
Operating temperature: -100°C

www6.slac.stanford.edu/lsst
lsst.org/about/camera/features
#Rubin #astronomy
3/n

Continued thread

The 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.
Field of view = 3.5°.
The 3.2-gigapixel camera hangs below the secondary mirror.
lsst.org/about/tel-site/optica
#Rubin #astronomy
2/n