Rubin will #CaptureTheCosmos in exquisite detail starting in 2026 🌌 Funded by @NSF and @DOEScience. Para español: instagram.com/rubin_observat…

Joined August 2008
1,525 Photos and videos
The largest spot-the-difference effort EVER has begun!🚨 On the night of Feb 24, NSF–DOE Rubin Observatory officially released its first ~800,000 public alerts of detected changes in the night sky!🔍 A new era of discovery is here✨ 🔗: rubinobservatory.org/news/fi…
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Soarin', flyin' 🦅 The NSF–DOE Rubin Observatory team recently spotted an Andean Condor soaring overhead! These massive birds are among the largest in the world, with wingspans that can exceed 3 meters (~10 feet) 🤯 🎥: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/B. Blum
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Most large telescopes are tall & spindly. This one? Short & squat. Meet NSF–DOE Rubin Observatory’s Simonyi Survey Telescope in this @NOIRLabAstro #ImageOfTheWeek! With a unique three-mirror design & low center of gravity, this 350-ton machine moves & maps the night sky quickly.
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Welcome to #RubinInFocus: a new series exploring the complex tech behind the NSF–DOE Rubin Observatory! 🔭 First up: this sci-fi-looking structure is Rubin's giant calibration screen. But what does a giant glowing wall actually do in an observatory? 👇 🧵
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Before the 3200-megapixel LSST Camera maps the Universe, it needs a reality check. We shine uniform LED light on this screen for "flat-fielding." Because every pixel gets identical light, any variations we see come from the hardware, not the cosmos!
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This allows the team to: 🧼 Detect & correct for dust on mirrors/lenses 🎛️ Measure tiny variations across billions of pixels 🎯 Ensure images contain only pure cosmic data It looks like a sci-fi spaceship prop, but it makes Rubin's data the best it can be!
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Let's take a panoramic tour of NSF–DOE Rubin Observatory's site on Cerro Pachón! 🧵 📷: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/H. Stockebrand
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3️⃣ Meet the Differential Image Motion Monitor (DIMM) tower! While twinkling stars might look romantic, the shifting air making them twinkle also affects our images. The DIMM tower helps track that atmospheric turbulence (or "seeing") in real time.
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4️⃣ Every big telescope needs a trusty sidekick! Rubin's 1.2-meter Auxiliary Telescope acts as its color-corrector, measuring how the atmosphere scatters light across different colors to make Rubin's data as precise as possible.
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Your phone can take a wide-angle shot of the sky, but it won't see deep space. NSF–DOE Rubin Observatory combines a wide-angle view with a whopping 3200-megapixel camera. This allows it to capture an area 45 times the size of the full moon in a single shot! 🌕
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See just how fast it works: Rubin can image the entire constellation of Orion in just 21 minutes! 🏹 The kind of cosmic surveying that used to take days or weeks can now happen in the time it takes to eat a midnight snack 🥪
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📷: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA 🎥: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/R. Proctor
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Cerro Pachón comes in more colors than you might expect! ⛰️ Sunsets in red, orange, and yellow. Green foliage, and even the soft green of atmospheric airglow...
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...deep blue twilight. The pinks and purples of approaching night. Home to NSF–DOE Rubin Observatory, this mountaintop in Chile is always changing with the light and the seasons, and every color adds something beautiful to the view!
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Longer nights means more time for the stars 🌟 As we get closer to winter in the southern hemisphere, sunset gets earlier. But that's good news for ground-based astronomy observatories like NSF–DOE Rubin Observatory, because longer nights mean more time to #CaptureTheCosmos!
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Cosmic tales and star trails ✨ The sky passes over Cerro Pachón, home of NSF–DOE Rubin Observatory in this long exposure image. As the night continues, the stars appear to rotate above. The long exposure turns the point-like stars into circular streaks as they pass overhead.
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But in some sense this is an illusion — the stars appear to move because the Earth is rotating. That focal point at the lower left? That's the south celestial pole, which is the southern end of the axis that Earth rotates around.
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📷: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/H. Stockebrand
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When the dome opens, the night sky is the star of the show! 🌌 Inside NSF–DOE Rubin Observatory, the 8.4m telescope sits under an enormous dome. The open slit might seem too narrow, but it’s all we need to protect the telescope while giving full access to the sky.
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📷: 1, 3, 4: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/H. Stockebrand 2: NSF–DOE Rubin Observatory/NOIRLab/SLAC/AURA/W. O'Mullane
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