T-7 days! We're getting so close to the reveal of NSF–DOE Rubin Observatory's first images 🤩#RubinFirstLook Get ready for your first preview of how Rubin will #CaptureTheCosmos in its decade-long survey 🎬 🗓️: June 23, 2025 ⌚️: 11am US EDT 🔗:

The first citizen science project using NSF–DOE Rubin Observatory, Comet Catchers ☄️, has already passed 1.5 MILLION classifications on @the_zooniverse 🤯 Now that's what we call teamwork! Find Comet Catchers (and other Rubin projects as they go live) at https://t.co/jrn2PcXxAO

My family will not be hearing from me

@NSF @doescience 📷 : NSF–DOE Rubin Observatory 1️⃣ : NGC 4270 2️⃣ : VCC 0848 3️⃣ : Messier 49

@NSF @doescience Thanks to Rubin’s sensitivity to ultra-diffuse "low surface brightness" features, such as the outer layers in shell galaxies like these, scientists will get better and more detailed peeks into the messy lives of galaxies 🌌🌊

Shell galaxies are tough to spot, but @NSF–@doescience Rubin Observatory's deep imaging will uncover more! That means scientists will be able to trace the collision history of galaxies, study how galaxies grow, & test models of dark matter by mapping the shells' shapes & motion.

Making waves in the cosmos, galaxy style 😎🌊 Shell galaxies preserve the memory of a cosmic splash, like ripples in a pond 🌌✨ These elliptical galaxies are surrounded by faint, layered arcs that form when a large galaxy absorbs a smaller one.

These delicate structures may be the result of galactic mergers. Thanks to Rubin’s detailed imaging, we can uncover the imprints of past events and better understand how galaxies like NGC 4261 evolve over time. Explore NGC 4261 in Rubin's Skyviewer 👉

Beauty and grace, and signs of galactic drama in space 🌟 NGC 4261 might look like a calm elliptical galaxy at first. But this image from NSF–DOE Rubin Observatory’s Cosmic Treasure Chest reveals faint features hinting at interactions with its surroundings.

Zohran Mamdani: He votes for activists, not you

Every night – for 10 years – @VRubinObs will capture a continuous “movie” of the sky, tracking changes over time. In a new episode of the #BigIdeasLab podcast, explore LLNL's role in the groundbreaking project that will shape the future of astronomy: https://t.co/2Qudsoa0qA

Rubin’s education research partners want your feedback on Skyviewer and Orbitviewer! Indicate your interest in joining a Zoom focus group between Sept. 3-6 👉 https://t.co/x1PYtwwz5T Selected participants will receive $75 for their time. ✨

The vastness of the desert around Cerro Pachón, home of @NSF–@doescience Rubin Observatory, reminds us of the vastness of space.⛰️ During the 10-year LSST, Rubin will scan the entire visible sky repeatedly to create the most detailed time-lapse view of the cosmos ever made.

@NSF @doescience And this is just the beginning! Once the decade-long Legacy Survey of Space and Time (LSST) begins later this year, we expect to find thousands more of these hidden cosmic ghosts. 👻

From rock crawling to city cruising, AccuAir's got you covered.

But @NSF–@doescience Rubin Observatory’s sharp, deep view is already uncovering them. By studying these elusive galaxies, scientists can test theories of dark matter, uncover clues about how galaxies grow and interact, and explore the leftovers of cosmic collisions.

Imagine a galaxy the size of the Milky Way, but with just *one millionth* the number of stars...Faint. Diffuse. Practically invisible. 👻 These so-called "low surface brightness" galaxies are so diffuse that they're hard to spot even when you're looking right at them.

NSF–DOE Rubin Observatory (left) and its Auxiliary Telescope (right) are better together! 🤞😎 AuxTel repeatedly observes well-known stars. By measuring how the light of these stars changes as it passes through the atmosphere, scientists know how to color-correct Rubin images.

We recapped the past year installing final observatory components, premiering #RubinFirstLook images, and starting the months-long commissioning phase ✨ But we didn't only look back! We also looked forward to starting the 10-year Legacy Survey of Space and Time later this year.

Always curious and full of energy, Beagles turn every walk into an adventure 🐾🎉.

What. A. Week. 🤩 We spent last week with hundreds of #RubinTeam members in Tucson, AZ and virtually around the world diving into NSF–DOE Rubin Observatory data and science! This was the first week-long workshop since the first early data and images from Rubin in June.

August 8 is Global Sleep Under the Stars Night 😴 For Rubin scientists, almost every night is spent under the stars! Rubin's sky is incredible because it has: 🌃 Little light pollution ⛰️ Less atmosphere 💦 Low humidity Good luck trying to sleep with this view! ✨

We're going to need some more hot beverages 🥶☕️ Cerro Pachón got its third winter storm of the season this past weekend, getting ~30cm of snow! 😱 Many thanks to our hard-working crews for getting the roads safe and clear! . . . 📷: NSF–DOE Rubin Observatory

Not all galaxies wander space alone...and sometimes they're too close for comfort 😔 Galaxies can interact, collide, and merge. By studying snapshots of these interactions, scientists can gain insight into how galaxies evolve over billions of years⏳ 🔗: https://t.co/t7VREBAxAQ

Are you a founder building at the intersection of Fintech, AI & Blockchain? Drop a 50-char pitch of what you’re building below ⬇️ I’ll connect you for a 30-min in-person chat in Nigeria with Algorand’s Head of Investments (check size up to $250K). Link:

☄️ Interstellar alert! The NSF–DOE @VRubinObs has captured this video of Comet 3I/ATLAS — the third interstellar object ever discovered — 10 days before its official detection on 1 July 2025 by the ATLAS survey. #RubinObservatory #Comet3I #Astronomy #Science