Live tonight at the Leonard Nimoy Event Horizon Theater! Come to Griffith Observatory and see my talk about Interstellar Comet 3I/ATLAS! Or, tune in live here: www.youtube.com/watch?v=hghv... Starts at 7:00 PM PST.

I’ll be this month’s guest on Griffith Observatory’s All Space Considered on Thursday, November 20, 2025, 7:00 p.m. - 8:00 p.m. PST. You can see the event live at the Leonard Nimoy Event Horizon Theater or tune in online. Information here: griffithobservatory.org/event/all-sp...

By the way, if you are curious, Gemini Observatory and Shadow the Scientist are teaming up to present a livestream of the observation of interstellar comet 3I/ATLAS on November 25th. Feel free to sign up and watch the observations take place in real time. ucsc.zoom.us/meeting/regi...

Woohoo! Go @JWSTObserver! Observing Oort cloud comet C/2014 UN271! www.stsci.edu/jwst-program...

A recording of last night's session: August 27, 2025: A Close Encounter with an Interstellar Visitor from Gemini South www.youtube.com/watch?v=5__A...

Will hopefully be observing interstellar comet 3I/ATLAS with the Gemini South telescope tomorrow night! Register to watch here: ucsc.zoom.us/meeting/regi...

Our latest paper on minimoon 2024 PT5 has been published in Astronomy & Astrophysics (A&A). Thank you for the support, @brycebolin.bsky.social et al. www.aanda.org/articles/aa/...

3I/ATLAS on Planetary Radio: www.planetary.org/planetary-ra...

☄️ Say hello to Comet 3I/ATLAS, just the third interstellar object ever seen in our Solar System! NSF–DOE Rubin Observatory didn’t discover the comet, but even during testing, it caught a glimpse. Imagine what we'll find once full science operations begin later this year! 🔭🧪

Some great coverage by David L. Chandler at Sky & Telescope about our recent MNRAS paper on 3I/ATLAS: skyandtelescope.org/astronomy-ne...

Chandler et al., feat. @pbernardinelli.com @megschwamb.bsky.social @merrdiff.bsky.social @astrokiwi.bsky.social @chrislintott.bsky.social @starzanplanets.bsky.social @brycebolin.bsky.social @jradavenport.com @astrohopkins.bsky.social @javierlicandro.bsky.social @malenarice.bsky.social ...

Palomar and Apache Point Spectrophotometry of Interstellar Comet 3I/ATLAS by Belyakov et al. 2025 iopscience.iop.org/article/10.3...

Bolin et al. 2025 “Interstellar comet 3I/ATLAS: discovery and physical description ” has now been officially published on 2025 July 18 in Monthly Notices of the Royal Astronomical Society: Letters, slaf078, doi.org/10.1093/mnra...

Thanks to @Astro_Jonny for the fantastic coverage of 3I/ATLAS! www.scientificamerican.com/article/new-...

Our manuscript "Interstellar comet 3I/ATLAS: discovery and physical description" has been accepted for publication in the Monthly Notices of the Royal Astronomical Society Letters!

Congratulations to Jin Beniyama on the new paper, "Multi-epoch spectro-photometric characterization of the minimoon 2024 PT5 in the visible and near-infrared", accepted for publication in Astronomy & Astrophysics! arxiv.org/abs/2507.10527

Interview: Bryce Bolin on recent observations of Interstellar Comet 3I/ATLAS: www.youtube.com/watch?v=yg3C...

Apache Point Observatory Colors of Interstellar Comet 3I/ATLAS www.astronomerstelegram.org?read=17284

🚨 Cosmic cameo alert! 🚨 On the latest @ShadowScientists.bsky.social, Bryce Bolin (Eureka Scientific) teamed up with observatory superstars Leo Alcorn, Matt Wahl & Josh Walawender to catch a rare guest from the galactic beyond: Comet 3I/ATLAS! 🌌☄️ Wanna comet along next time? 🛸✨ shadow.ucsc.edu ✨

Shadow the Scientist Session tonight! Live streamng observing interstellar object 3I/ATLAS with the Keck Telescope! @shadowthescientists_sts ucsc.zoom.us/meeting/regi...

Spectral Slope and Colors of Interstellar Comet 3I/ATLAS with the Palomar 200-inch Palomar Next Generation Spectrograph: www.astronomerstelegram.org?read=17276

Go Tianwen-2! www.youtube.com/watch?v=GqjA... Say hello to 311P for me: en.wikipedia.org/wiki/311P/Pa...

Our manuscript, "Keck and Gemini Characterization of Hayabusa2# Rendezvous Target 1998 KY26" has been published today in the Astronomical Journal: iopscience.iop.org/article/10.3...

Physicist Sau Lan Wu was born #OTD in 1940. She co-discovered three jet events in the TASSO experiment at DESY (supporting the existence of gluons), was on the team that discovered the J/Ψ particle, and works on the ATLAS experiment at CERN. 🧪 ⚛️ 👩‍🔬 Image: UW-Madison

Our manuscript, "The Discovery and Characterization of Earth-crossing Asteroid 2024 YR4", has now been published in Volume 984 of the Astrophysical Journal Letters: iopscience.iop.org/article/10.3...

"Astronomers Trace Earth-Crossing Asteroid to Surprising Origin", now published in the Astrophysical Journal Letters keckobservatory.org/2024-yr4/

Now accepted for publication in the Astrophysical Journal Letters: "Gemini South Observes Shape and Origin of Near-Earth Asteroid 2024 YR4" noirlab.edu/public/news/...

In summary, Jupiter's irregular satellites are a land of contrast. arxiv.org/abs/2501.16484 JWST Reveals Varied Origins Between Jupiter's Irregular Satellites by @bsharkey.bsky.social @asrivkin.bsky.social @cathomas.bsky.social et al.

Come see what observing outer solar system objects is like with Shadow the Scientist: January 15, 2025: Testing the Taxonomy of Neptunian Trojans with Keck Ob... youtu.be/KLgIdFEntIg?... via @YouTube

My article, "The Discovery and Characterization of Minimoon 2024 PT5" has been published in The Astrophysical Journal Letters, Volume 978, is available here: iopscience.iop.org/article/10.3...

Aurora near Boise, ID.

Go JWST, go!

A free copy of my article, "The Palomar twilight survey of ‘Ayló’chaxnim, Atiras, and comets", now published in Icarus, Volume 425, is available for free download for the next 50 days: www.sciencedirect.com/science/arti...

Two new papers just out now, both about finding asteroids and comets: 1.) "The Palomar twilight survey of 'Ayló'chaxnim, Atiras, and comets" arxiv.org/abs/2409.15263 2.) "Identification and Localization of Cometary Activity in Solar System Objects with Machine Learning" arxiv.org/abs/2409.15261

New book out about machine learning for small solar system bodies: shop.elsevier.com/books/machin...

#CAQTDL2 observed this morning from Apache Point Observatory

Oumuamua the horse: horsebetting.com.au/captain-oumu...

Sign up here to watch me tomorrow night live observe asteroids at the NASA Infrared Telescope Facility ☄️ 🔭 : ucsc.zoom.us/meeting/regi...

Tomorrow night! www.instagram.com/stories/bryc...

Aurora from downtown seattle.

A most excellent 🧵 going through the details of our submitted paper!

Super interesting lecture on planet formation by Prof. Alessandro Morbidelli tomorrow, 6PM Paris time, Thursday, Jan 25 at the Collège de France : www.college-de-france.fr/fr/agenda/le...