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Bill Keel

@ngc3314.bsky.social
549 followers 113 following 1K posts

Astronomer, husband, father, staff of cats, sometime trombonist

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Reposted by Bill Keel
Bruce Macintosh @bmacastro.bsky.social · 4h
Nice historical note: this is the 30th anniversary of the first time astronomers reached the diffraction limit with a sodium laser guide star. www.ucobservatories.org/pioneering-t...
ucobservatories.org
Pioneering the Stars: Celebrating 30 Years of Sodium Laser Guide Star Adaptive Optics at Lick Observatory
Thirty years ago, in September and October 1996, an extraordinary breakthrough took place atop Mount Hamilton that forever changed ground-based astronomy. On the 3-meter Shane Telescope at Lick Observ...
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Bill Keel @ngc3314.bsky.social · 01/10/2026
Lemme see whether tagging @dragoncon.org will get this on the Con feed. One might think I'd long ago figured out doing BlueSky feeds, but one would be wrong. #dragoncon
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Bill Keel @ngc3314.bsky.social · 30/09/2026
In case you missed it at the Con - a processed collection of images we took in front of an audience (sometimes based on requests) at this year's Live Astronomy in Space Track. The remotely-operated telescopes are at observatories in Chile and the Canary Islands. Check us out in 2027! #dragoncon
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Kym @ The Evening Sky Map @skymaps.com · 29/09/2026
💫 The October 2026 edition of The Evening Sky Map (PDF) is available for download at skymaps.com/tesm/. It features easy-to-use sky maps for the northern & southern hemispheres, and equatorial regions. Enjoy exploring the night sky! 🔭 #stargazing #space #nightsky
The Evening Sky Map is a circular all-sky star chart showing constellations, the Milky Way, planets, horizon directions and deep-sky objects depicted by symbols with an accompanying legend, plus a left-column sky calendar listing lunar and planetary events and viewing times.
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John F Wu @jwuphysics.bsky.social · 25/09/2026
Built a thing that #aatrosky may enjoy: galaxy-manifold.github.io
The galaxy SFR - stellar mass sequence shown on a phone screen, with galaxy image cutouts as well as lines showing the relation for galaxies based on subselections in Dn4000 break strength. All from the web app.
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overlapzoo.bsky.social @overlapzoo.bsky.social · 23/09/2026
I'm excited to announce the official launch of Overlap Zoo, a citizen science project supported by @nasa and in collaboration with the @galaxyzoo.org team. Please help us classify and categorize these amazing cosmic coincidences! www.zooniverse.org/projects/tbu...
zooniverse.org
Overlap Zoo | Zooniverse - People-powered research
Classify overlapping galaxies from the DESI Legacy Imaging Survey
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Bill Keel @ngc3314.bsky.social · 21/09/2026
An expedition to The Former Platform reveals lost of Academia is Rotting and Deserves It discourse, often associated with very individual grievances and implicit views of its role. So this seems like the time to repeat what I realized when Younger Son took his first Criminal Justice course: [1/n]
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Bill Keel @ngc3314.bsky.social · 17/09/2026
Just posted - Galaxy Zoo in its 20th Year (from ASP 2026 virtual meeting) blog.galaxyzoo.org/2026/09/17/a...
blog.galaxyzoo.org
A quick summary – Galaxy Zoo in its 20th year
The Astronomical Society of the Pacific (also known lately as the Astro Society to stress that their membership isn’t just around the Pacific Rim) recently held their annual meeting, this tim…
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Bill Keel @ngc3314.bsky.social · 08/09/2026
Almost 1st thing done in Live Astronomy during @dragoncon.org last Friday night - from SARA 1m Kapteyn telescope at La Palma, series of 30s exposures of Nancy Grace Roman space telescope transiting the faint galaxy KOS 222659.3-215011 in Aquarius. (Range 636,000 km)
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Bill Keel @ngc3314.bsky.social · 08/09/2026
In honor of the 60th anniversary of the US premier of The Original Series - here's a relevant bit of nebulosity in the middle of NGC 6334, the Catspaw Nebula in Scorpius (in H-alpha, from the SARA Remote 60-cm telescope on Cerro Tololo). Boldly go!
Part of the Catspaw Nebula in Scorpius, cropped to show a bright section shaped like the Federation emblem in Star Trek.
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Bill Keel @ngc3314.bsky.social · 07/09/2026
The highlight of my @dragoncon.org experience this year? After possible schedule confusion, I got to be the bad guy chasing the game-design billionarie who's been to orbit off the stage so we could start the 11:30 p.m. Live Astronomy event in Space Track. Maybe that should go on my CV.
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Bill Keel @ngc3314.bsky.social · 31/08/2026
(Consults JPL Horizons to see about possible optical imaging of Roman). Wow, it passes the lunar distance late tomorrow afternoon for North American time zones. Currently kind of toward Fomalhaut and trucking right along.
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Kym @ The Evening Sky Map @skymaps.com · 28/08/2026
💫 The September 2026 edition of The Evening Sky Map (PDF) is now available for download at skymaps.com/tesm/. It features easy-to-use sky maps for the northern & southern hemispheres and equatorial regions. Enjoy exploring the night sky! 🔭 #stargazing #space #nightsky
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Bill Keel @ngc3314.bsky.social · 17/08/2026
Finally finished this Messier gallery with 15-cm Celestron Origin smart scope (images autostacked in the app, some further tweaked for contrast). Exposures 5 minutes (open star clusters) to 90 minutes (galaxies), most from light-polluted suburbia. It's so cool. 🔭 #astro
Gallery of color images of the 110 Messier-catalog galaxies, nebula, and star clusters.
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Bill Keel @ngc3314.bsky.social · 10/08/2026
With a total solar eclipse coming up, this may be useful for first-time eclipse photographers (albeit dating from the era of film). How the corona looks at various exposure levels. I always bracket widely even with a digital SLR.
Montage of total-eclipse photographs at various exposure levels, from 1/200 second at f/22 showing prominences to 1/2 second at f/6.3 showing the outer corona and deep blue sky. All at ISO 160.
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Bill Keel @ngc3314.bsky.social · 09/08/2026
A most excellent @galaxyzoo.org Voorwerpje system, seen in expertly-processed Hubble data. Like a 90-kiloparsec double helix.
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Bill Keel @ngc3314.bsky.social · 01/08/2026
Just got my tentative schedule for @dragoncon.org Space Track. Counting the Live Astronomy events (y'all come!) I'm down for 20 hours of programming. The Con may come when I am too old for this, but it will not be this Con! (Let it not be this Con). But I may be calling Waymos between hotels.
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Kym @ The Evening Sky Map @skymaps.com · 31/07/2026
💫 The August 2026 edition of The Evening Sky Map (PDF) is now available for download at skymaps.com/tesm/. The PDF features easy-to-use sky maps for the northern & southern hemispheres and equatorial regions. Please share and enjoy exploring the night sky! 🔭 #stargazing #space #nightsky
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Bill Keel @ngc3314.bsky.social · 28/07/2026
Just had my first expeerience shopping at an Ikea store. I have some kind of genetic predisposition toward Mid-Century Modern and they are close enough. (It also seems fitting that there is a secondhand Lego exchange next door. That must be how youngsters are prepared to someday assemble Ikea)
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Ronen Tamari @ronentk.me · 24/07/2026
Large scale human collaboration is as beautiful as the cosmos itself (Galaxy Zoo is a citizen science astronomy project where people classify galaxies, started in 2007 and still going!) en.wikipedia.org/wiki/Galaxy_... #astrosky
I can honestly say that Galaxy Zoo is the best thing I’ve ever done. . . . I don’t know quite what it is, but Galaxy Zoo does something to people. The contributions, both creative and academic, that people have made to the forum are as stunning as the sight of any spiral, and never fail to move me.  —Alice Sheppard, volunteer Galaxy Zoo moderator
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Andy Scollick @andyscollick.bsky.social · 24/07/2026
The Madrid Deep Space Communication Complex at Robledo de Chavela municipality in the Community of Madrid, Spain on fire. Burgohondo wildfire. 📷 via Infues Avila
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Bill Keel @ngc3314.bsky.social · 17/07/2026
Submitting abstract for ASP meeting "celebrating 250 years of astronomy in the United States". It seems oddly fitting that co-presenters include one from the US in the US, one from the UK in the US, one from the US in the UK, and one oscillating between US and UK. So we kind of got over it.
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Bill Keel @ngc3314.bsky.social · 02/07/2026
Hey, Judy started wth some of my SARA data for this one!
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Lukas C. H. @gewoonlukas.bsky.social · 01/07/2026
And the Pegasus-XL launch of the Swift Boost Mission has unfortunately been delayed again due to unfavorable weather. The next launch attempt is now scheduled for tomorrow, July 2nd, at 09:09 UTC.
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Jeff Foust @jfoust.bsky.social · 30/06/2026
NASA says today's Pegasus XL launch of the Swift reboost mission was scrubbed because of weather, and has been rescheduled for tomorrow. science.nasa.gov/blogs/swift/...
science.nasa.gov
Launch of Mission to Boost NASA’s Swift Scrubs Due to Weather - NASA Science
The launch of Katalyst Space’s LINK designed to boost the orbit of NASA’s Swift observatory, was postponed Tuesday due to unfavorable weather conditions.
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Kym @ The Evening Sky Map @skymaps.com · 29/06/2026
💫 The July 2026 edition of The Evening Sky Map (PDF) is now available for download at skymaps.com/tesm/. The PDF features easy-to-use sky maps for the northern & southern hemispheres and equatorial regions. Please share and enjoy exploring the Universe! 🔭 #stargazing #space #starmap
The Evening Sky Map is a 2-page monthly publication in the PDF format that features an all-sky map of the night sky, a calendar of celestial events, and a list of celestial objects visible to the naked eye, binoculars and telescopes. The high resolution PDF is free to download at: skymaps.com/tesm/
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Bill Keel @ngc3314.bsky.social · 25/06/2026
Today's oddity while organizing Dropbox file trees - from the Space 1986 exhibition in Utrecht, a life-size outline of a Saturn V attached to the 112m cathedral tower (Domtoren).
Utrecht cathedral tower with a life-size flat outline of a Saturn V booster attached to it. The tower was 1 meter taller.
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Emily Lakdawalla 🏳️‍⚧️ Uranus Expert @elakdawalla.bsky.social · 21/06/2026
Hi everybody, I organized the #Artemis2 photos for you. Index pages containing all ~10,000 images in chronological order with time stamps and focal lengths, color coded by which of three cameras was used to shoot them. countlessworlds.com/data/artemis/
countlessworlds.com
Emily's data pages: Artemis
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Bill Keel @ngc3314.bsky.social · 18/06/2026
Younger Son (in aviation security) introduced me to a very particular kind of Easter egg. Airline flight numbers are not always sequential or random. American Airlines 420 goes from DFW to - Denver. Lufthansa has 2222 to Toulouse (which works only in English).
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Bill Keel @ngc3314.bsky.social · 18/06/2026
So cool. Some features are moving outward at good fractions of c, some are not (standing shocks??)
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Senator Chris Van Hollen @vanhollen.senate.gov · 13/06/2026
Today, the Nancy Grace Roman Space Telescope leaves NASA Goddard for the Port of Baltimore to begin its journey to the Kennedy Space Center. This August, Roman will launch into space, broadening our understanding of our solar system & universe. Excited to see it on the move!
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Bill Keel @ngc3314.bsky.social · 09/06/2026
Things showing up while organizing assorted Dropboix directories: from a UK visit in 2008, hiking up to the Whte Horse (you know, in White Horse Vale). I get asked for directions a lot, but these all lined up even when I did not have a lab coat or clipboard.
A flock of sheep on an English hillside all lining up behind the photographer.
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ESA Space Science @science.esa.int · 08/06/2026
Help scientists find clumps of star-forming regions in galaxies with the @galaxyzoo.org project Clump Scout II on @zooniverse.bsky.social! 1/3 🔭 🧪 #CitizenScience
The Galaxy Zoo: Clump Scout II interface. An image of a galaxy that the model thinks is clumpy is visible on the left side. It has different coloured boxes, representing different types of astrophysical objects – green for clumps, yellow for foreground stars, blue background galaxies and red for galaxies’ central bulges. A panel on the right gives users the chance to review these labels.
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Bill Keel @ngc3314.bsky.social · 07/06/2026
To blockly go...
Starship Enterprise (TNG Picard version) in front of the Milky Way as seen from outside, both in Lego blocks. Q must have been at it again.
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Bill Keel @ngc3314.bsky.social · 04/06/2026
Just when anonymous comments on FB have me thinking social media are on life support, quality content like this is a ray of hope.
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Bill Keel @ngc3314.bsky.social · 03/06/2026
Ah. That kind of week. We just got the answer to "will the garbage and recycling pickup crews try a second time if their route was blocked by a SWAT team serving a warrant four doors down?" (Thanks, city employees!)
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Bill Keel @ngc3314.bsky.social · 28/05/2026
Reasons to continue Hubble operations in the era of JWST, Rubin, Roman... one of the white papers from the community. arxiv.org/abs/2410.011...
arxiv.org
We Must Preserve Hubble given its Unique Complementarity to Webb, Roman, and Euclid
We present compelling arguments -- focusing on galaxy science -- for preserving the main imagers and operational modes of the Hubble Space Telescope (HST) for as long as is technically feasible, to as...
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Kym @ The Evening Sky Map @skymaps.com · 27/05/2026
💫 The June 2026 edition of The Evening Sky Map (PDF) is now available for download at skymaps.com/tesm/. The PDF features easy-to-use sky maps for the northern & southern hemispheres and equatorial regions. Please share and enjoy exploring the Universe! 🔭 #stargazing #space #starmap
The Evening Sky Map is a 2-page monthly publication in the PDF format that features an all-sky map of the night sky, a calendar of celestial events, and a list of celestial objects visible to the naked eye, binoculars and telescopes. The high resolution PDF is free to download at: skymaps.com/tesm/
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ELSA: Euclid Legacy Science Advanced analysis tools @elsa-euclid.bsky.social · 26/05/2026
Would you like to rummage data from the Euclid space telescope, and uncover cosmic nurseries where stars like our Sun are born? We're delighted to announce our new @ec-euclid.bsky.social @zooniverse.bsky.social citizen science project, Galaxy Zoo Clump Scout 2 🧪🔭 www.zooniverse.org/projects/hug...
zooniverse.org
Galaxy Zoo: Clump Scout II | Zooniverse - People-powered research
Correct machine predictions to reveal the shapes of stellar nurseries!
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Bill Keel @ngc3314.bsky.social · 21/05/2026
Finishing "Archaeology from Space" by @indyfromspace.bsky.social, I was tickled to see a two-paragraph shoutout to @galaxyzoo.org in the lead-in to their global archaeological program. The Earth and the Universe are both big places, but all together we can grok them more fully.
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Paul Byrne @theplanetaryguy.com · 18/05/2026
This is a composite of the Moon, Mars, and Earth I made. The Moon and Earth are from Artemis II, and Mars is from the Psyche mission. Each image was taken *in the last six weeks*
Three crescents. Top: the Moon. Midde: Mars. Bottom: Earth. Background: the infinite black of space.
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Galaxy Zoo @galaxyzoo.org · 12/05/2026
Launching today - a first project with @vrubinobs.bsky.social and @galaxyzoo. Dive in quickly - these galaxies won't last long. 🔭
blog.galaxyzoo.org
A first Galaxy Zoo:Rubin project
We’re delighted to announce the first Galaxy Zoo workflow to include images from the NSF-DOE Vera C Rubin Observatory, using galaxies drawn from its first Data Preview.  First look image showing the diversity of galaxies we can expect from the Vera C Rubin's LSST survey. The new workflow went live on the site just now, but with only 10,359 subjects it won’t stick around for long, so do jump in and get classifying.
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Bill Keel @ngc3314.bsky.social · 11/05/2026
Hmm. Every HST proposal I was part of is listed as having a PDF problem preventing its processing. Since they were submitted from different institutions, I am forced to conclude it's a problem at STScI, or even intrusion?
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Bill Keel @ngc3314.bsky.social · 06/05/2026
Things I just learned from a Zoom team meeting: some US universities have outsourced their IT support and security, and it's even a worse idea than it sounds.
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Megan Watzke @mwatzke.bsky.social · 05/05/2026
Martin Weisskopf, who helped shape modern X-ray astronomy and was the Chandra Project Scientist for many years, died last week at the age of 84. In lieu of flowers, the family asks that people write letters of support to sustain the mission. www.berryhillfh.com/obituaries/m...
berryhillfh.com
Martin Charles Weisskopf Obituary May 2, 2026 - Berryhill Funeral Home & Crematory
View Martin Charles Weisskopf's obituary, send flowers, find service dates, and sign the guestbook.
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Arp Bot 🤖 @arpbot.bsky.social · 04/05/2026
Hubble image of Arp 297, also known as NGC 5754 and NGC 5752. The pair's interactions created kinked arms in NGC 5754 (the large spiral galaxy) and the blue star clusters in the core of NGC 5752 (the smaller galaxy). Credit: NASA, ESA, the Hubble Heritage team, W. Keel Source
A pair of galaxies, a large face-on barred spiral galaxy and a smaller edge-on disk galaxy. The upper portion of the frame is dominated by the spiral galaxy NGC 5754. It has a bright, pale yellow, circular core that transitions into an almost vertical bar structure. Two well-defined spiral arms circle around the core counter-clockwise, beginning at the ends of the bar. The arms both complete one revolution around the core and then fade out. They are dotted with pale blue star clusters. At about 5 and 7 o'clock on the bottom of the galaxy, the spiral arms have small kinks, creating what looks like straight segments in the otherwise smoothly curving arms. Overall, the galaxy looks a little like a cinnamon roll. In the bottom left corner of the frame is the smaller companion galaxy NGC 5752. It is oval-shaped, with the long axis almost vertical, running parallel to the bar of the large spiral. On a background of pale yellow stars is a line of blue dots, which are star clusters, running through the long axis in the center of the galaxy. Below this is a dark brown dust lane.
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Bill Keel @ngc3314.bsky.social · 27/04/2026
A little something for everyone. Dust, lensing - and I bet you'd see stochastic variations in the at least one of the core images if you watched long enough, from a web of caustics maybe tracing down to planetary mass.
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Kym @ The Evening Sky Map @skymaps.com · 26/04/2026
🌟 The May 2026 edition of The Evening Sky Map (PDF) is now available for download at skymaps.com/tesm/. The PDF features easy-to-use sky maps for the northern & southern hemispheres, and for the equatorial regions. Please share and enjoy exploring the Universe! 🔭 #stargazing #space
The Evening Sky Map is a 2-page monthly publication in the PDF format that features an all-sky map of the night sky, a calendar of celestial events, and a list of celestial objects visible to the naked eye, binoculars and telescopes. Free to download at: skymaps.com/tesm/
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John Lewis @astrojthe3.bsky.social · 24/04/2026
this is incredible and absolutely awesome inspiring. I don't know the last time that we (certainly, I) had such a crisp view of the venerable telescope. IT'S A REAL THING!! UP THERE!!🥹 #astronomy 🔭
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Rick Steves @ricksteves.bsky.social · 24/04/2026
In Seattle? Please join Bishop Shelley Bryan Wee and me this Sunday, April 26 at 4pm for “The Traveler and the Bishop on the State of America's Democracy and Christian Nationalism.” It’s free & easy to register at www.ricksteves.com/travel-tips/travel-classes/travel-talks-with-rick. See you soon!
A graphic with the Rick Steves logo, a photo of Shelley and Rick in Venice, and the following text: "The Traveler and the Bishop on American Democracy and Christian Nationalism with Rick Steves and Bishop Shelley Bryan Wee."
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