Jennifer Lynn Bartlett
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bartlettastro.bsky.social
Jennifer Lynn Bartlett
@bartlettastro.bsky.social
250 followers 26 following 200 posts
Sharing the joy of astronomy through practical applications, teaching, and public outreach
writing in personal capacity, opinions my own
#science #astronomy #histsci #scicomm #stemed
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bartlettastro.bsky.social
The guns fell silent at the 11th hour of the 11th day of the 11th month in 1918.

But they did not stay silent long.

Remembering with gratitude all who have served.
Thank you to those who serve now.

Field of Poppies, Gustav Klimt 1907
#veterans #veteransday #Armisticeday #military #poppy #calendar
painting of field of poppies and wildflowers flows among fruit trees leading to distant forest or green hills under a mostly cloudy sky through which some sunlight tries to break through; courtesy https://www.gustav-klimt.com/
November 11, 2025 at 4:26 PM
bartlettastro.bsky.social
"Night after night goes by: and clocks still chime
And stars are changing pattrns in the dark"
from "Two O'clock" by Christopher Morley

Why then turn the hands backward or forward seasonally?

#astrophysics #timekeeping #seasons #daylightsavingtime
AI generated image of an analog mantel clock against a stary background
November 3, 2025 at 1:47 AM
bartlettastro.bsky.social
#Astronomers
Try your #Adsabs accounts & libraries in #SciX by midnight on the #crossquarterday to obtain a lifetime of necromancy-free results (limited time offer)

@scixcommunity.bsky.social guarantees your safety or your money back
A vibrant astronomical image of the Witch Head Nebula (IC 2118) set against a backdrop of deep space filled with countless stars. The nebula features intricate wisps and clouds of gas and dust, highlighted in shades of blue and faint white, creating an ethereal appearance reminiscent of a witch's head. Bright stars punctuate the scene, with larger stars exhibiting a bluish glow. The image is framed with a black border that includes a label with the nebula's name and identifying the image as using data from the STScI Digitized Sky Survey Blue, Red, and Infrared Plates processed into a full color image by Noel Carboni
October 31, 2025 at 8:46 PM
bartlettastro.bsky.social
To those who celebrate #Samhain, may you have the #blessings of #harvest, #hearth, and #home this #season.

To those who celebrate #Halloween, may you have more treats than tricks.

#calendar #timekeeping #crossquarterday
A close-up photograph of a lit white candle with a flickering flame, positioned in an ornate metal candlestick. The candle is surrounded by a warm autumnal scene, featuring a harvested arrangement that includes pumpkins, red apples, and fall leaves. Wisps of smoke rise delicately from the candle's flame, creating a tranquil atmosphere. The background is dark, allowing the colorful elements in the foreground to stand out, reinforcing the seasonal theme of warmth and coziness associated with autumn. An orange cloth is draped beneath the scene, further enhancing the autumnal aesthetic. photograph by ozaytseva 2020 via Pixabay
October 31, 2025 at 7:53 PM
bartlettastro.bsky.social
Roughly halfway between #autumnalequinox & #wintersolstice, we celebrate the changing #seasons, the coming of #winter:
#Halloween
#AllHallows
#DíadelosMuertos
#samhain
the 4th #crossquarterday
Take a moment to enjoy the #sky, as did those who worked out our #calendar.
#Astrophysics 🍎
A diagram illustrating the concept of cross-quarter days within an astronomical context. The diagram features a spherical representation of Earth positioned at the center, with labeled points indicating the Autumnal Equinox, Winter Solstice, Vernal Equinox, and Summer Solstice located along the ecliptic plane, which is denoted by a blue arc. Red crosses mark specific points identified as the 1st, 2nd, 3rd, and 4th cross-quarter days, positioned between the solstices and equinoxes. The North Celestial Pole (NCP) and South Celestial Pole (SCP) are indicated by vertical arrows. Image credit NASA
October 31, 2025 at 3:27 PM
bartlettastro.bsky.social
Astrophysics version of SciX includes Classic tab. I know it's not exactly the ADS of my graduate school days but I read you ...
Screenshot of SciX main search page for astrophysics featuring the classic ADS look
October 8, 2025 at 12:23 AM
bartlettastro.bsky.social
#SciX has a proposal search for awarded proposals, which we are matching to papers.
SciX screenshot of results from search for JWST proposals
October 3, 2025 at 2:04 PM
bartlettastro.bsky.social
#SciX has a filter for planetary features named in the #USGS Gazetteer of Planetary Nomenclature. We are tagging all the #astronomy and #planetaryscience papers using NER and working on new categories.
Screenshot of SciX planetary features facet
October 3, 2025 at 1:55 PM
bartlettastro.bsky.social
#planetaryscience is included in the #SciX #astronomy collection, as it was in #ADSabs. We are working on breaking out a separate collections for planetary science and #heliophysics.
Screenshot of SciX collections facet
October 3, 2025 at 1:50 PM
bartlettastro.bsky.social
#SciX lets you pick a discipline-specific interface, with some different tools and vocabularies for each community. Your selected discipline should boost more relevant results.
October 3, 2025 at 1:46 PM
bartlettastro.bsky.social
#SciX is where we are doing new development, including discipline specific tools.
SciX default sort is "relevance" rather than date, but you can change that.
Screenshot of SciX results view
October 3, 2025 at 1:42 PM
bartlettastro.bsky.social
To those who celebrate, may you have a meaningful fast and a good sealing.

#yomkippur #timekeeping #calendar
black and white postcard illustration of a man covered with a tallit blowing a shofar in the synagogue in front of the congregation; 19th cen. (public domain via Wikimedia Commons)
October 2, 2025 at 7:05 PM
bartlettastro.bsky.social
For those who celebrate, Shanah Tovah and all good things in AM 5786.

The #Jewish #calendar synchronizes #lunar & #solar cycles.

#newmoon was Sunday. #AutumnalEquinox was Monday. #RoshHashanah began Monday at #sunset.

#NewYear #timekeeping #astrophysics #year #equinox #season 🍎
Still life photograph of Rosh Hashanah: apples, honey, pomegranates, shofar, and menorah; designed by freepix.com
September 23, 2025 at 12:59 PM
bartlettastro.bsky.social
#AutumnEquinox 2:19 PM EDT (18:19 UTC) Sept 22, 2025

#Sun crosses #celestialequator heading south, ushering in #northernhemisphere #fall ( #southernhemisphere #spring)

Fewer trees would make more impressive #sunrise at UMass Amherst Sunwheel

#astrophysics #seasons #timekeeping 🍎#calendar #equinox
Sun is just visible through background trees against a partially cloudy sky with two standing stones in a field in the foreground; a sign and a smaller rock in front of and between the larger standing stones; equinox sunrise 2025 at the University of Massachusetts, Amherst, sunwheel
September 22, 2025 at 5:43 PM
bartlettastro.bsky.social
Tell #time at #night during the Golden Age of #Piracy?

Of course, just consult your #nocturnal #star dial.

You'll also need to find #Polaris & #UrsaMajor or #UrsaMinor.

#celestialnavigation #talklikeapirate #timekeeping #stargazing #instrumentation #astrophysics #histsci 🍎 #sailing #science
Two concentric wooden dials mounted on a circular wooden backplate with a decorative handle at the top and a point at the bottom. The outer dial has a long arm extending outward. The backplate and central dial have circular scales inscribed on them. Standard wooden nocturnal for use with Ursa Major and Ursa Minor, c. 17th century. Courtesy National Maritime Museum, Greenwich, London (CC-BY-NC-ND)
September 20, 2025 at 1:03 AM
bartlettastro.bsky.social
Hoping for clear skies tonight for my Night Sky class

#astrophysics #stargazing #scicomm
A woman in classic Greek costume stands in front of a medieval-style pavilion
August 7, 2025 at 11:27 PM
bartlettastro.bsky.social
#astronomer
#geodist
#scientist
scientific #programmer
#knitter
#mother
former Secretary @aas.org
founder @frnzplanetarium.bsky.social
US Naval #Observatory, retired

Alice K. B. Monet, you inspire me

#womanastronomersday #astrophysics #womeninSTEM #earthscience #geodesy
headshot of Alice Monet
August 1, 2025 at 6:42 PM
bartlettastro.bsky.social
#Constellations & crafts today, focused on the #SummerTriangle: Vega in #Lyra, Deneb in #Cygnus, & Altair in #Aquila

#astrophysics #stargazing #Starlore #Edusky
Selection of constellation flash cards and blocks on a tablecloth with a Celtic pattern
July 30, 2025 at 8:06 PM
bartlettastro.bsky.social
Incredible #sailing under the bridge last week.
Hope the swabs had a meaningful transit outbound.

#SanFrancsico #SwabSummer #USCGAcademy
Rigging and sails of a ship passing under the Golden Gate Bridge with blue sky in the background as seen from the deck
July 29, 2025 at 3:20 AM
bartlettastro.bsky.social
Same ship, different ocean
Celestial navigation will take us where she needs to go

#astrophysics #stargazing #celestialnavigation
3 master sailing ship with US Coast Guard stripe at pier with sea and sky in background
July 17, 2025 at 5:55 PM
bartlettastro.bsky.social
For those who celebrate, may you draw strength and vitality from the summer solstice.

Sun reaches max declination Jun 21 2025 at 02:42 UT1 (Jun 20 22:42 US EDT)

#summersolstice #summer #solstice #calendar #season #timekeeping #Sun #astrophysics 🍎
night photograph of towering bonfire against darkness; courtesy of Hans via Pixabay
June 20, 2025 at 8:13 PM
bartlettastro.bsky.social
Solstice from Latin sōlstitium via old French

sōl (sun) + participial stem of sistĕre = stand still

according to OED

#astrophysics #solstice #heliophysics #histsci #OED #etymology #season #calendar #timekeeping #summer #SummerSolstice #Sun #Latin #French #English 🍎
quasi-rural landscape with parked cars framed by two large stones in foreground, three informational markers visible in middle distance, sun on the horizon in the distance with a dramatically partially cloudy sky; University of Massachusetts at Amherst Sunwheel during a summer solstice; courtesy of UMass Amherst
June 20, 2025 at 4:10 PM
bartlettastro.bsky.social
Thank you, @rebeccacharbon.bsky.social for an eloquent summary of the far-reaching effects of the US Nautical Almanac Office 1869 eclipse expeditions and their attempts at "physical astronomy"

#histsci #astrophysics #spectroscopy #physics #USNO #Navy #solareclipse
An old-fashioned map of the North American continent showing the United States, Mexico, British America, and Russian America with crossing from Russian American through British American through the Midwest and ending in the South Carolina; the caption reads "Path of the Eclipse"; source: Source: ‘‘The Great Solar Eclipse,’’ Scientific American, August 21, 1869
May 2, 2025 at 8:31 PM
bartlettastro.bsky.social
Einen schönen Tag der Arbeit wünsche ich Euch.

#LaborDay in Austria falls on a #crossquarter day, roughly halfway between #vernalequinox and #summersolstice, as the days continue to lengthen.

#timekeepying #calendar #solstice #equinox #astrophysics #earthscience #EGU25 #EduSky
Apple blossoms bloom in the foreground against a pale sunset and hazy river landscape in the background; photograph courtesy 1113eye via Pixabay.
May 1, 2025 at 2:17 PM
bartlettastro.bsky.social
Joanne Simpson (1923-2010)
1st woman in the U.S. to earn #meteorology PhD
pilot

her research & models revolutionized our understanding of #clouds & #hurricanes, helping to shape modern #weather forecasting

#WomensHistoryMonth #HistSci #WomeninSTEM #atmosphere 🍎
black & white photograph of woman using a slide rule while sitting in chair at a table covered in papers; "Dr. Joanne Simpson (1923–2010) pores over reams of images of tropical clouds filmed during flights across the tropical Pacific." photograph courtesy Schlesinger Library
March 31, 2025 at 2:19 PM