I'm back with another new Milky Way satellite galaxy from the DELVE survey! Introducing Aquarius III: arxiv.org/abs/2410.00981. We argue it's interesting because of its cold velocity dispersion + orbit which keeps it far from the disk plane --> formed in a very-low-mass DM halo?

So excited to share the first two science papers of the Merian medium-band survey! 🦋 We image Hα and [OIII] to measure weak lensing and resolved star formation in low-z dwarfs over ~750 deg^2. Check out the survey paper led by Shany Danieli at: arxiv.org/abs/2410.01884 !

Tonight's aurora from Yale's Leitner Observatory in New Haven! Leitner Observatory Yale University

The first Aeos paper is finally on arXiv!! ✨ Read the summary below and the full paper here: arxiv.org/abs/2410.16366

We are looking for someone to help develop data reduction and analysis software for the 1000-lens Dragonfly array that we're building in Chile. It's a 5 year position in the Dragonfly Focused Research Organization. Thanks for spreading the word! aas.org/jobregister/ad…

I am happy to announce the conference Galactic Frontiers II: Dwarf Galaxies in the Local Volume and Beyond, taking place at Dartmouth 🌲 from June 23-25, 2025.  For more information and registration, please see our website: sites.dartmouth.edu/galactic-front…

When you turn it on and it works spectacularly! The Rubin team has successfully completed the first on-sky engineering tests using the 144-megapixel engineering camera, ComCam! Up next: installing the largest digital camera in the world, LSST Camera. 🔗: rubinobservatory.org/news/rubin-com…

🌌✨Exciting cosmic news! Astronomers using DECam at Cerro Tololo and Gemini Observatory South have uncovered three ultra-faint dwarf galaxies in a stellar “ghost town” far away from larger neighbors! 🧵 Read more: noirlab.edu/public/news/no…

This is bone chilling. We are watching a Censorship Regime forming. Everyone in America - citizens and green card holders - has the protection of free speech.

The university will not surrender its independence or relinquish its constitutional rights. Neither Harvard nor any other private university can allow itself to be taken over by the federal government. hrvd.me/ResearchFundin…

Eye to the sky…on-sky engineering tests have begun at U.S. National Science Foundation–DOE Office of Science Rubin Observatory with the world’s largest camera! After installing & testing the LSST Camera, we turned the telescope to the sky—a moment 20 years in the making! Rubin #CommissioningNotes are back! ✍️ 🧵

🔭 Using NOIRLab Blanco telescope, the DELVE survey mapped satellites of NGC 55 🌌—revealing agreement with ΛCDM. This work sets the stage for deeper exploration with the upcoming NSF-DOE Rubin Observatory. 🔗ui.adsabs.harvard.edu/abs/2025arXiv2…

Yerkes Observatory: Yerkes Observatory Gains Full Ownership of Iconic Glass Plates yerkesobservatory.org/yerkes-observa…