Sextant c.1941. Willing to demonstrate. Prefer my celestaire for sights tonight and local apparent noon tomorrow. #sail250 #astrophysics #histsci #scicomm #science #dusky #sun

Ships in the night #sail250

Aaah, my ship came in and she is beautiful. #sail250 #celnav

This can help you get started if it all seems intimidating.

www.urgentmatter.press/nasa-recomme... #astronomy #library #books #history

A superb article on the truly remarkable Virginia Trimble, a wonderful astronomer and someone I’ve had the great privilege of collaborating with. Our latest work together was the book “The Reinvention of Science: Slaying the Dragons of Dogma and Ignorance”. 🔭⚛️🧪 skyandtelescope.org/astronomy-re...

Last month with Mt. Wilson's 3rd generation Sam Hale = George Ellery Hale grandson Deborah Shapley = Harlow Shapley granddaughter Gabriele Vajente was Talks+Telescopes speaker about @ligo.org Thank you @mtwilsonobs.bsky.social for a marvelous evening #astrophysics #histsci #scicomm #darksky

Update: in response to this news report, Springer Nature has reinstated the papers. The notices placed on the articles blame "human error in 2011". 🧪⚛️🔭 www.science.org/content/arti...

Why did Springer Nature retract two papers by Max Planck, ~70 years after they were published? Any why were they selling blank PDFs for $40? The answer seems to involve a misbehaving unsupervised algorithm. Because of course it does. 🧪⚛️🔭 www.science.org/content/arti...

Thomas Jefferson (4/2/1743 o.s.-7/4/1826) Virginian, patriot, author of the Declaration of Independence, slaveholder Complicated legacy, much like America Never however without hope and promise Where will our next 250 take us? #FourthOfJuly2026 #History #America250 #IndependenceDay #Monticello

For those who celebrate, may you feel the power and radiance of your light on this #SummerSolstice. June 21, 2026 08:24 UT1 #Sun reaches 23.5 N declination, above #TropicofCancer #astrophysics #calendar #season #tropics #summer #solstice

#Northernhemisphere #Summersolstice occurs when #Earth ’s tilt toward #Sun is max & Sun is directly over #TropicofCancer (23.5°N latitude) During #summer #solstice, Sun is at highest point in sky & marks longest #daylight of #year #astrophysics #calendar #season #tropics 🍎☀️🧪

🔭 Keogram: The Sky in 2025 Image Credit & License: //creativecommons.org/licenses/by-sa/4.0/deed.en">License: Cees Bassa (Netherlands Institute for Radio Astronomy) ap260621

#AAS248 Numbering the Women who Numbered the Stars June 16 2:50-3:00 PM EDT Pasadena Conf Ctr Ballroom C How @harvardplatestacks.bsky.social & @scixcommunity.bsky.social will build digital #author profiles for early #WomeninSTEM #ExploreAstronomy #histsci #astrophysics #libraryscience

#AAS248 Observing #Arctic #Twilight iPoster 129.02 Terminal 28 June 15 5:30-6:30 PM PDT all the colors of cold civil, #nautical, astronomical twilights how do we model well #naturallight available in the subtle between times #ExploreAstronomy #illuminance #refraction ☀️ #atmosphericphysics #Moon

#AAS248 It's 2026 Do you know where yr dissertation is? iPoster 102.10 Terminal 9 June 15 9-10 AM PDT @scixcommunity.bsky.social #AstroGen #Astronomy #Thesis Collection want to ensure your pivotal work is findable, accessible #ExploreAstronomy #openscience #planetaryscience #scicom ☀️🍎 #library

Today, we remember the courage, the strength, & the sacrifice of those who gave their lives for our country, our constitution, our freedom (& those who mourn them) Thank you Memorial Hall at #USNA honors graduates who died in service #MemorialDay #Navy #veteran #MilitaryHeroes #gratitude #honor

Bravo Zulu #USNA class of 2026 Fair winds and following seas, new ensigns Thank you for your willingness to serve. #graduation #Navy #USN #Annapolis #congratulations

#AbSciCon26 Today Wed May 20 is last day for Exhibit hall Come before 5 PM CDT 4 #SciX demo accelerate yr science discover more open resources (data, software, papers) make yr work more citable #openscience #NASAscience #astrobiology #digitallibrary #planetaryscience ☀️🧪 #astrophysics #Earthscience

#AbSciCon26 Poster 361 #SciX Supporting Open & Interdisciplinary Science Tue May 19 3:45-5:15 PM CDT 4,966 #astrobiology publications is a lot to manage 36M #research products even more so learn to navigate them effectively & efficiently #openscience #NASAscience #FAIR #Earthscience ☀️🧪 #library

#AbSciCon26 did she mention we have stickers

#AbSciCon26 look forward to seeing you this afternoon

What's New @scixcommunity.bsky.social ? - #Astrobiology blog - #legacy data queued for digitization - @univofmaryland.bsky.social talk recap - #Earth 's crust electrical resistance modeled #astrophysics ☀️ #planetaryscience #Earthscience #NASAscience #openscience #digitallibrary #interdisciplinary

#AbSciCon26 come learn how #SciX can support your #openscience about digital library as #interdisciplinary as #astrobiology to find data, software, proposals, papers to visualize yr lit search #planetaryscience #Earthscience #astrophysics ☀️🧪 #biology #physics #NASAscience @scixcommunity.bsky.social

We’re at #AbSciCon26 all of this week! If you’re in Madison, WI, and want to know all about astrobiology and how our team have been enriching the corpus of astrobiology knowledge within SciX, find our team at our booth or our poster to learn more. We also have some cute swag!

Congratulations Anna Kelbert mapped subsurface electrical resistivity We are vulnerable to #geomagneticstorms Understanding risk is important, but need effective prediction & responses #EarthScience #Earthcrust #solaractivity #geophysics @scixcommunity.bsky.social www.cfa.harvard.edu/news/scienti...

" #Astronomer s? I thought they drove #train s." said no one ever. Thank you Mid-Continent #Railway #Museum for letting me join your Starlight Express for an evening of #stargazing by rail. #astrophysics #railroad #darksky #history #scicom

The SciX Team are at #EGU26 in very sunny Vienna this week! Come and see Daniel and Suze to discover what we're up to at our booth on Level -2 (between the posters and the coffee - both equally tempting). Anna has a talk on Thursday and Suze has a poster on Friday. See you there!

For those who celebrate, may the #Beltane fires awaken your spirit and guide toward renewal. #MayDay is a #crossquarter day, falling halfway between #vernalequinox and #summersolstice #calendar #timekeeping #seasons #astrophysics #equinox #solstice 🍎

BZ Trident Scholar "Zooming in on Dual and Binary Supermassive Black Holes w/ JWST using Aperture Masking Interferometry" #USNA #mids #USNavy #USNO #NRL #UnivWynoming #astronomy #JWST #blackhole #womeninSTEM

🔭 Comet R3 PanSTARRS Behind Satellite Trails Image Credit & Copyright: Uli Fehr ap260427

Lucie Rowland reports for @astrobites.bsky.social on whether JWST’s most extreme high-redshift galaxy candidates aren’t galaxies at all, but the explosive deaths of the very first stars. aasnova.org/2026/04/28/t... 🔭

President's Statement on the Reported Dismissal of the National Science Board AAS President Dara Norman issues a statement expressing concern about the reported dismissal of the National Science Board. aas.org/posts/news/2... 🔭

As exciting as returning to the #Moon will be, let us not forget the beauty of "this fragile #earth, our island home" 2026 APR 06: #ArtemisII crew photographs the crescent Earth as they circumnavigate the Moon. #EarthDay #astrophysics #planetaryscience #NASA #spaceflight #Artemis

What's New @scixcommunity.bsky.social? ADS & #SciX founder Mike Kurtz retires #APSsummit26 recap #HistSci literature survey #AIML workshop recap #astrophysics #planetaryscience #Earthscience #digitallibrary #digitaltransformation #NASAscience #openscience ☀️ scixplorer.org/scixhelp/wha...

#AAS248 Volunteer Opportunities: We love getting help from undergrads, grads, postdocs, and local amateur astronomers to help in sessions, at registration, special events, and various other essential roles. Apply by 1 May. 🔭https://www.cognitoforms.com/AAS5/AAS248VolunteerInterestForm

Are you an astronomy graduate student who’s interested in science communication? Apply for the AAS Media Fellowship by June 26! aasnova.org/2026/04/08/a... 🔭 @aas.org

For those who observe, remember that the new commandment given this night is to love one another. #LastSupper ( #MaundyThursday) is associated w/ a #Passover seder observed by Jesus hence the " #fullmoon after #vernalequinox" part of dating #Easter Sunday #calendar #timekeeping #astrophysics 🍎

To those who celebrate, chag pesach kasher v’sameach. Full moon April 2 2026 02:12 UTC Full moon Nissan 15 5786 05:12 IDT Jewish #calendar is lunisolar w/ #fullmoon in middle of #month As #spring festival, #Passover #moon occurs shortly after #vernalequinox #passover #timekeeping #astrophysics 🍎

Geraldyn “Jerrie” Cobb (1931-2019) top 2% of ALL candidates on Mercury program screening tests 7k flying hours 1st woman to fly #ParisAirShow ferried military aircraft in WWII 3 world #aviation records #NASA told her men only #WomeninSTEM #astronaut #histsci #spaceflight #WomensHistoryMonth 🍎#pilot

For those who celebrate, may you experience peace & happiness on this special day. Eid Mubarak! Shawwal #moon was seen, ending #Ramadan 1447 AH fast for Muslim communities. #EidalFitr determination in US uses both #moonwatch & #astrophysical calculations. #calendar #timekeeping #crescentmoon 🍎

For those who celebrate, shake off your #winter hibernation & sing w/ #nature this #spring. #Ostara blessings. Happy #vernalequinox! On #equinox, #Sun rises due #east, sets due #west; daylight & darkness nearly balanced (refraction gives more light) #calendar #timekeeping #astrophysics #season 🍎

March 20 2026 14:46 UT1 #Sun crosses #celestialequator heading northward #vernalequinox in #northernhemisphere #daylight period will continue to lengthen until #summersolstice #southernhemissphere #seasons are reversed #astrophysics #astrophotography #calendar #equinox #timekeeping #solstice 🍎🧪

#APSsummit26 Are you a #science explorer? Visit #SciX booth in Hyatt by 1 PM MDT today to create "libraries", paper sets, that reduce stress of prepping lit review bibliography/ref list CV/pub list Stickers by Yueyi Che @scixcommunity.bsky.social #physics #openscience #NASAscience #research ☀️🧪

#APSsummit26 Are you a #science explorer? Visit #SciX booth in Hyatt to visualize collaborations in #physics identify resources useful when working on topic review successful proposals related to idea Stickers by Yueyi Che @scixcommunity.bsky.social #openscience #NASAscience #planetaryscience 🧪☀️

#APSSummit26 "Science Explorer: Next Gen Access to ADS & All #NASAScience" Poster 209, Exhibit Hall March 17, 2026, 2-5 PM MDT Have you tried #SciX on your phone? #digitallibrary #research #openscience #physiscs #astrophysics #planetaryscience #Earthscience @scixcommunity.bsky.social ☀️

#APSSummit26 "Exploring #Physics Literature w/ #Science Explorer" Poster 396, Exhibit Hall March 17, 2026 2-5 PM MDT What are you looking for? Let #SciX help you find it! #digitallibrary #research #openscience #NASAscience #planetaryscience #earthscience #astrophysics @scixcommunity.bsky.social ☀️

#APSsummit26 Are you a #science explorer? Visit #SciX booth in Hyatt to learn how to find papers, data, & software efficiently & effectively w/ free #digitallibrary Stickers by Yueyi Che #astrophysics ☀️ #planetaryscience #openscience #Earthscience #NASAscience #physics @scixcommunity.bsky.social

We're excited to see you at the APS Global Physics Summit 2026 from 15th to 20th March 2026! The conference is at the Colorado Convention Center in Denver CO, and we'll be there presenting two posters and doing demos at the SciX booth. Find us at the Hyatt next to the NASA booth!

1926 March 16 Robert H. Goddard (1882-1945) launched 1st successful liquid-fueled #rocket & Space Age (only world didn't know it yet) reached height of 41 ft & traveled distance of 90 ft in a flight lasting 3 sec 100 yrs later, still basis for #spaceflight #spacetechnology #histsci #physics 🍎🧪