ALT A dense field of countless pinpoint stars fills the frame against the deep black of space, creating a fine, grainy texture like fine sand spread across a smooth table. Dozens of particularly bright stars in blue, yellow, and orange glitter across the scene like jewels.
Wispy, grayish clouds of galactic dust drift across the center and right sides of the image, appearing soft and powder-like against the dark background.
Scattered throughout the entire scene are stars and faint objects in shades of blue, yellow, and red. Some appear as sharp, solid points, while others are soft, diffuse smudges. Zooming in reveals that many of these tiny, faint smudges scattered between the stars are actually distant galaxies, varying from smooth, pebble-like blobs to faint, stretched lines.
Welcome to Chile, @SLACLab LSST Camera team colleagues!
They arrived from California last week for scheduled camera work during NSF–DOE Rubin Observatory’s planned engineering downtime. This engineering period will last about three weeks in total.
ALT A "selfie" from two workers wearing helmets and safety vests using Rubin's primary mirror. They're standing on a metal platform with metal structural beams reflected behind them.
ALT Five workers wearing safety gear inside Rubin's dome next to a curved concrete wall.
ALT A person in red safety gear and yellow helmet laying on a platform while working on Rubin's giant digital camera.
ALT Two people working on computers in an office with safety hard hats and high-visibility vests nearby.
Planned engineering periods are common in ground-based astronomy, especially in winter when the weather is less favorable. During this time, teams will do maintenance and other work that keeps the observatory running smoothly during the rest of the year! đź”§đź”
Imagine looking up and watching a star suddenly lose 99% of its light.
These stars are a rare type of variable star called an R Coronae Borealis. They suddenly puff out huge clouds of dust, blocking nearly all their light for months before returning to normal.
We can't see inside stars — we really can only observe the light coming from their surfaces. But when a star changes in brightness, it can reveal clues about what's happening deep inside.
That's why scientists are so interested in variable stars!
NSF–DOE Rubin Observatory will detect ~100 million variable stars during its 10-year survey, helping scientists uncover why some stars stay steady for billions of years while others rewrite the rules!
🎥: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA
In the sky above NSF–DOE Rubin Observatory shines the Pleiades (M45): an open star cluster with at least 1000 stars!✨
Its bright stars are too bright for Rubin's sensitive camera to study, but Rubin will observe many other clusters & help scientists study how stars evolve.
ALT Large observatory with angular silver dome under a clear night sky filled with stars. A bright, blue star cluster sits above the observatory dome.
Happy September equinox from NSF–DOE Rubin Observatory! It's the first day of spring here in the south🌸
Equinox fun fact: day & night aren't exactly equalđź‘€ Atmospheric refraction and the way we define sunrise/sunset mean most places get slightly more than 12 hours of daylight!
ALT Observatory building with open, angular dome perched on a mountain ridge with a vibrant setting sun behind in a clear sky.
ALT Sunset backlighting tall wildflowers with red petals against a clear blue sky and white observatory building with open, angular dome in the background.
ALT Yellow wildflowers in sharp focus with a white observatory building with open angular dome and clear blue sky in the background.
The Moon is showing off again🌕✨
It's International #ObserveTheMoon Night! 🌙
The Moon is dazzlingly bright — so bright that NSF–DOE Rubin Observatory will never point at it. But there are many Solar System objects that are incredibly faint, and that’s where Rubin shines.
ALT Large full moon rising behind an observatory dome on a dark mountain ridge at night.
ALT Sequence of stacked images showing the moon setting diagonally from right to left above an observatory on a rocky mountain peak.
ALT Silhouette of a building against a vibrant red and orange sunset sky with a thin crescent moon.
ALT Large observatory building silhouetted against a twilight sky with a crescent moon visible above.
Our Solar System has millions of wandering asteroids and comets that are small, far away, and usually dark. Rubin Observatory excels at detecting faint objects, and it’ll reveal 10-100 times more Solar System objects than were known before! đź”
¡Felices Fiestas Patrias!🇨🇱🎉
From Cerro Pachón, NSF–DOE Rubin Observatory wishes our colleagues, neighbors, & the entire Chilean community a joyful celebration.
Chile’s national holidays are celebrated as Fiestas Patrias: a time for food, dancing, loved ones, & Chilean pride🇨🇱
Meet LEDA 1205871 and LEDA 29228, two galaxies in NSF–DOE Rubin Observatory's view of COSMOS.
They're “shell” galaxies, created when a larger galaxy absorbs a smaller one. These cosmic ripples preserve clues to past mergers, and Rubin’s sensitivity will help uncover many more 🌌
ALT Deep-space field filled with distant galaxies and stars. Two large golden elliptical galaxies at upper left-center and lower center show faint shell structures surrounding them. The black background is speckled with red, blue, and white points of light.
ALT A dense field of countless pinpoint stars fills the frame against the deep black of space, creating a fine, grainy texture like fine sand spread across a smooth table. Dozens of particularly bright stars in blue, yellow, and orange glitter across the scene like jewels. A white box at lower left calls attention to two particular galaxies.
Just a piece of NSF–DOE Rubin Observatory's Ocean of Stars 🌊✨
This galaxy is MCG-06-33-009, and the blue knots in its spiral arms show where hot, young stars are forming.
Rubin will capture billions of galaxies and enable scientists to study how galaxies grow and change 🌀
ALT Golden spiral galaxy with blueish spiral arms in a dense star field. Numerous orange and blue stars dot the dark sky, with a bright bluish star left of center and faint background galaxies scattered throughout.
ALT A wide, panoramic view of a dense field of pinpoint stars filling the entire frame like fine dust. A white square notes a specific galaxy near upper center. Wispy, grayish-brown clouds of galactic cirrus drift across the scene, creating a subtle, patchy texture over the dark background. Several brighter stars stand out, most notably a large, brilliant blue star on the upper right surrounded by a soft glowing halo, along with a few other scattered bright blue and warm orange stars.
POV: Your background music is a bit…terrestrial.
Try a cosmic soundtrack instead! 🎧🌌
Skysynth translates NSF–DOE Rubin Observatory’s data into sound — now with Rubin's view of COSMOS!
Let it drift, or pan, zoom, and jump between different spots🎶
skyviewer.app/skysynth
Just a normal camera, if “normal” means:
đź” A 3.2-billion-pixel sensor
🌌 A field of view that could fit ~45 full Moons
⏱️ A new 8-gigabyte image every ~40 seconds
NSF–DOE Rubin Observatory's LSST Camera is the largest ever built (thanks @SLAClab!)
Ok, maybe that's not normal.
ALT Technician in cleanroom suit inspecting a large, cylindrical camera barrel inside a clean room.
ALT Close-up of a Romanesco broccoli head showing its intricate fractal pattern in black and white. The mosaic grid of LSST Camera's ~200 individual CCDs is visible as vertical and horizontal black lines.
ALT Workers in safety gear guide the car-sized LSST Camera suspended by green straps inside Rubin's large maintenance hall.
ALT Close-up view of the huge LSST Camera installed at the center of Rubin's 8.4-meter telescope, with metal scaffolding on either side.
đź“·:
1. J. Orrell/SLAC National Accelerator Laboratory
2. LSST Camera Team/NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA
3. O. Bonin/SLAC National Accelerator Laboratory
4. NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/T. Lange
Universe, meet your astronomical dream team! 🤝
Two observatories, two different ways of seeing the cosmos, and a whole lot of potential for discovery when their observations come together.
ALT Rubin Observatory perched atop its mountain summit site on Cerro PachĂłn. The observatory is boot-shaped at lower left with long white service building extending left and silver dome sticking up. The dome's vertical slit is open, revealing the telescope in the blackness within. The night sky is peppered with the pinpricks of stars. The Little Beehive Cluster of stars is a denser collection of pinpricks to the upper right of the observatory.
ALT Artist’s rendering of a silver space telescope with a triangular sunshield and dish antenna floating in deep space against a star-filled black background.
🛰️ @NASA's Roman Space Telescope will capture sharp, wide-field views from space. Its crisp vision will reveal details that can be difficult to see from the ground, especially in crowded regions of the sky, while its infrared eye will peer through dust that blocks visible light.
ALT Artist’s rendering of a silver space telescope with a triangular sunshield and dish antenna floating in deep space against a star-filled black background.
Together, they'll give us a richer and more complete view of our dynamic Universe, leading to discoveries that neither dataset could reveal on its own! 🌌
đź“·:
1. NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/P. Horálek
2. NASA Goddard Scientific Visualization Studio