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Chamberlin Observatory

@chamberlin-obs.bsky.social
263 followers 28 following 46 posts

The University of Denver's historic Chamberlin Observatory, 2930 E Warren Ave, 303-871-5172. We host astronomy classes and public events by @denverastro.bsky.social. Schedule at www.denverastro.org. ⭐Supported in part by federal grant funds.⭐

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Denver Astronomical Society 🔭 @denverastro.bsky.social · 10/09/2026
We’re excited to welcome amazing partners to Moon Night: DarkSky Colorado, Planetary Science Institute, Space Foundation Discovery Center, CPW/Jackson Lake, DU, MSU Denver, CU Denver, Denver Public Library, and Wings Over the Rockies. Chamberlin Observatory Sept. 19, 5–10 p.m.
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Denver Astronomical Society 🔭 @denverastro.bsky.social · 10/09/2026
Free family Moon night in Denver! Join Denver Astronomical Society for International Observe the Moon Night on Sat., Sept. 19, 5–10 p.m. at historic Chamberlin Observatory and Observatory Park. Telescopes, Moon activities, demos, and more. denverastro.org/ObserveTheMoon
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Jackie Flynn Mogensen @jackiefmogensen.bsky.social · 27/08/2026
Don't miss tonight's lunar eclipse—the moon will be 96% covered by the Earth's shadow. The next lunar eclipse this good won't be until the end of 2028!
scientificamerican.com
You need to see the ‘blood moon’ lunar eclipse this week
This near-total eclipse will be visible from the Americas, Africa and Europe—here’s how to see it
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Seven Machina Rasmussen @toomanyspectra.bsky.social · 18/08/2026
🚨 it’s time for a GIVEAWAY!! ✨ want a copy of CLOUDY WITH A CHANCE OF STARSHIPS that’s full of my unhinged commentary, terrible doodles, and sentences that got axed by legal? here’s your chance! enter by friday to win a one-of-a-kind edition! @princetonupress.bsky.social
CLOUDY WITH A CHANCE OF STARSHIPS:
THE Annotated EDITION

deadline: friday august 21 at midnight

1 entry: like this post
2 entries: repost
5 entries: receipt (old)
10 entries: receipt (new)a gel pen laying on top of the bookmy own doodled version of the cover a chapter opener with notes
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Chamberlin Observatory @chamberlin-obs.bsky.social · 19/08/2026
#Denver: Mark your calendars for 🌓INTERNATIONAL OBSERVE THE MOON NIGHT 🌓 with @denverastro.bsky.social! Saturday, Sept. 19, 5pm onward Chamberlin Observatory, 2930 E. Warren Ave. Featuring telescopes, STEM activities, food, raffles, and fun! FREE and family friendly! tinyurl.com/denver-iotmn
A graphic showing a first-quarter Moon on a purple background, shading to pink at the bottom and featuring silhouettes of various world landmarks and people looking toward the sky. Text reads "International Observe the Moon Night, September 19 2026, #ObserveTheMoon, go.nasa.gov/ObserveTheMoon".
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 01/08/2026
Happy Lughnasadh! It's the anti-Groundhog Day: 6 more weeks of summer for those of us in the Northern Hemisphere. en.wikipedia.org/wiki/Lughnas...
en.wikipedia.org
Lughnasadh - Wikipedia
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Chamberlin Observatory @chamberlin-obs.bsky.social · 18/07/2026
Hey #Denver, join us Saturday for some summer stargazing! Look through the big historic telescope plus lots of others, courtesy of @denverastro.bsky.social . Highlights will include Venus, the Moon, and some nice star clusters! 🌙✨🔭 FREE, starts around 8:30pm. See you there! tinyurl.com/obs0718
Nighttime view of a red brick observatory next to a pine tree in front of a deep blue sky. The dome is open and the telescope is visible within. The name "Chamberlin Observatory" is carved over the door.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 20/06/2026
#Denver friends, join @denverastro.bsky.social for a summer solstice star party TONIGHT! We'll celebrate the shortest night of the year with glow sticks, building tours, a Mars sandbox, and stargazing through a variety of telescopes. ✨🔭 FREE, drop by any time after sunset! See you there!
An interior view of the Chamberlin Observatory dome, featuring brick red walls and a long white refracting telescope pointed out a gap in the gray dome. Several people stand around the telescope pier, taking pictures and looking at displays.
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 23/05/2026
Hey #Denver, come stargaze with me and @denverastro.bsky.social TONIGHT at @chamberlin-obs.bsky.social! The weather looks beautiful, and we will be pointing our telescopes at Venus, Jupiter, the Moon, and the stars of early summer. ✨ FREE, no reservations needed, drop by any time after sunset! 🔭
A nighttime time-lapse photo showing a red brick observatory with a silver dome, surrounded by trees. The dome is open to reveal a long white telescope inside. Above, many star trails trace circular patterns around a center not visible above the photo. Credit: University of Denver
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Chamberlin Observatory @chamberlin-obs.bsky.social · 22/05/2026
#Denver #astronomy fans, join @denverastro.bsky.social Saturday 5/23 for our monthly open house and stargazing event! 🌠 We'll offer views through the 20" historic telescope and more. FREE, no reservations needed, drop by anytime after dusk! 🌙🪐✨🔭 www.denverastro.org/events/open-...
Night view of Chamberlin Observatory, a red brick building with a hemispherical dome. The 20" refracting telescope inside is visible through the open dome slit.
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Paul Byrne @theplanetaryguy.com · 03/04/2026
This image of home just came down from the Artemis II crew. Taken after their translunar injection burn, there are aurorae at top right and lower left, and zodiacal light at lower right. Credit: NASA/Reid Wiseman
That's home. That's us.
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Denver Astronomical Society 🔭 @denverastro.bsky.social · 01/04/2026
Extra Astronomy Night tickets have been released for April - no joke! Grab 'em while you can and come see us at DU's historic Chamberlin Observatory @chamberlin-obs.bsky.social ! www.denverastro.org/reservations/
Screenshot showing the Denver Astronomical Society's booking calendar for April and May. Some dates are highlighted in green, indicating availability of tickets for sale to their Astronomy Night events. Other dates are highlighted in grey, indicating that an event is scheduled and sold out.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 22/03/2026
We had a nice night with about 130 guests! It cleared up nicely after about 8:30pm. Jupiter looked stunning, as did the Orion Nebula! 🤩 Thanks for turning out, everyone. Looking forward to seeing you again on April 25!
A deep-sky image of a fan-shaped nebula, M42, showing a white core, grey-brown dusty structures, and pink and green outer filaments. White and blue-green stars are scattered around the nebua. Taken with a Seestar S50 from Denver, 3/21/26, 15-minute exposure.
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 21/03/2026
Happy vernal equinox! You may know this as one of 2 dates when the day and night are roughly equal length, or as the beginning of spring in the northern hemisphere and fall in the southern. But to astronomers, the vernal equinox has an additional fun significance... 🧪🔭 (1/8)
A full disk view of the earth taken by NASA's GOES 16 satellite on the vernal Equinox, showing a shadow dividing the disk into two. The right side of the Earth, including South America and the Atlantic Ocean, is sunlit, while the left side including North America is in shadow. Credit: NOAA/NASA, https://science.nasa.gov/solar-system/skywatching/night-sky-network/embracing-the-equinox/
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Chamberlin Observatory @chamberlin-obs.bsky.social · 21/03/2026
Hey #Denver, come look through our telescopes on a nice warm evening tonight! The Moon 🌓 and Jupiter 👑 will be good targets even if the sky is somewhat cloudy. Free, no reservation needed, great for kids! 🔭 Hosted by @denverastro.bsky.social . Details: www.denverastro.org/events/open-...
Interior view of a the Chamberlin Observatory dome with red walls and a gray curved dome. The telescope in the center is long and white, and mounted on a black pillar with many gears and clocks visible. The telescope points toward the open dome slit, where a dark blue sky can be seen outside. People line the walls looking at displays and taking pictures of the telescope.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 23/01/2026
🚫 OPEN HOUSE CANCELLED FOR 1/24 🚫 Sorry, #Denver, no stargazing this Saturday due to unusually cold weather in the forecast! 🥶 Yep, even astronomers get cold feet sometimes. See below for an alternative indoor astro-event! Next open house is February 21 -- hope to see you there!
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Chamberlin Observatory @chamberlin-obs.bsky.social · 23/01/2026
🚫 OPEN HOUSE CANCELLED FOR 1/24 🚫 Sorry, #Denver, no stargazing this Saturday due to unusually cold weather in the forecast! 🥶 Yep, even astronomers get cold feet sometimes. See below for an alternative indoor astro-event! Next open house is February 21 -- hope to see you there!
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Chamberlin Observatory @chamberlin-obs.bsky.social · 26/12/2025
#Denver stargazers, join us for the last open house of 2025, this SATURDAY starting at dusk! We'll point our telescopes at the Moon 🌙, Saturn 🪐, and Jupiter 👑 before the cold front rolls in. Happy New Year from us and @denverastro.bsky.social! www.denverastro.org/events/open-...
A wintry nighttime view of a red brick observatory building topped with a silver dome. The sky is dark blue and starry, with the constellation Orion hanging above the dome. A welcoming yellow light illuminates the path and steps, and snowy pine trees frame the scene.
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 23/11/2025
Nice feature highlighting #astronomy research at @uofdenver.bsky.social! Always a treat to show off our beautiful observatory as well. 🔭🧪 @chamberlin-obs.bsky.social
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Chris Bianchi @bianchiweather.bsky.social · 12/11/2025
What to expect: 1) The show continues overnight 2) There’s a chance that tomorrow night’s northern lights show is even better than tonight’s (more below). (Disclaimer: I am not a space weather meteorologist, but the folks below are, and I did stay at a Holiday Inn Express)
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 12/11/2025
🚨HEY DENVER, GO LOOK AT THE SKY!!! 🚨 Never seen aurorae this good before. 🤯 They were totally naked-eye around 9:45pm from south Denver, bright red and green. They're coming and going, so if you don't see anything at first, try again later! Pics with an iPhone 13, 3-sec exposures
A night scene of pink streaky aurorae above a lit buildingA night scene of pink and green aurorae behind silhouettes of trees and power linesA night scene of red aurorae with a flamelike structure, behind houses and trees
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Chamberlin Observatory @chamberlin-obs.bsky.social · 08/11/2025
#Denver stargazers: come on over for an open house and star party with @denverastro.bsky.social TONIGHT, starting around 5pm! www.denverastro.org/events/open-...
Wide-shot time-lapse photograph of DU's historic Chamberlin Observatory at night. Above the dome to the left is Polaris, the North Star, and the other stars of the night sky are circling around it. The building is dimly lit, and red light can be seen in the windows upstairs inside the dome, which is open to the south. Tall pine trees surround the building.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 26/10/2025
It's pretty special! Looking forward to more Saturny goodness tonight! 🪐💖
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Chamberlin Observatory @chamberlin-obs.bsky.social · 25/10/2025
Hey, no need for competition. Plenty of astro events for all! 🤩
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Chamberlin Observatory @chamberlin-obs.bsky.social · 25/10/2025
Hey #Denver, it's going to be a beautiful night for a star party! ✨ Come on over for telescope viewing and building tours with @denverastro.bsky.social! We'll be looking at the Moon 🌙, Saturn 🪐, and at least one comet ☄️. FREE and fun for everyone! Info: www.facebook.com/events/72664...
A bright comet seen against a dark starry background, taken with my Seestar smart scope. The head of the comet at lower left is fuzzy and faintly greenish; the tail extends to upper right and includes a brighter central streak. The caption labels it "C-2025 A6, 3 min" and gives the coordinates of the observing location.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 24/09/2025
Huge thanks as always to @denverastro.bsky.social for running these popular events!
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Chamberlin Observatory @chamberlin-obs.bsky.social · 24/09/2025
🔭 Heads up, #Denver! Our next FREE star party is happening this Saturday! Come on over to look through our telescopes, tour the historic building, and meet our amazing @uofdenver.bsky.social physics students! ✨ Bonus: Saturn is back! 🪐 www.denverastro.org/events/open-...
Interior of the University of Denver's historic Chamberlin Observatory. A long white telescope stands on a black pillar in the center of a round room with brick red walls and a curved gray ceiling. The telescope is pointing out an opening in the dome toward a dark blue sky. People are standing around the room waiting their turn to climb a ladder at right that allows them to look through the telescope.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 11/09/2025
Our beautiful historic telescope is featured in the back-to-school welcome message from @uofdenver.bsky.social! www.youtube.com/watch?v=2yVO...
youtube.com
Welcome Back, Staff & Faculty! | University of Denver
YouTube video by University of Denver
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Chamberlin Observatory @chamberlin-obs.bsky.social · 22/08/2025
Find our schedule and other info at www.denverastro.org.
denverastro.org
Denver Astronomical Society – Sharing the Night Sky with the Public Since 1949
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Chamberlin Observatory @chamberlin-obs.bsky.social · 22/08/2025
Next open house and star party will be Saturday, Sept. 27. Mark your calendars for science fun and stargazing with @denverastro.bsky.social!
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 27/07/2025
Heads up, #Denver! Our next ✨ FREE ✨ stargazing event at @chamberlin-obs.bsky.social is happening next Saturday, 8/2! Come on over and let the experts of @denverastro.bsky.social show you the stars of late summer! (Note, start time is 8pm, not 8am as implied in the link 😄)
facebook.com
Open House Star Party at the Chamberlin Observatory
Party event in Denver, CO by Denver Astronomical Society on Saturday, August 2 2025
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 10/06/2025
I wrote a thing! 🏞️🌌 www.grandcanyon.org/about/news/f...
grandcanyon.org
Former Grand Canyon Astronomer in Residence on Public Lands
In this blog series, former Grand Canyon Artists and Astronomers in Residence reflect on the important role America's public lands play in art and science.
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 02/06/2025
I've been called many things, but this is a new one. 😆🤓 Thanks to Sahale Greenwood at Denver Life Magazine for the lovely profile! Also featuring @uofdenver.bsky.social, @chamberlin-obs.bsky.social, and @denverastro.bsky.social . 💖 www.denverlifemagazine.com/jennifer-hof...
denverlifemagazine.com
Jennifer Hoffman is a Guardian of the Galaxy
University of Denver professor and Chamberlin Observatory director Jennifer Hoffman helps Coloradans find wonder—and perspective—in the night sky.
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Denver Astronomical Society 🔭 @denverastro.bsky.social · 01/06/2025
Good morning, fellow astro-enthusiasts! It's June 1st, and we just unlocked two additional Astronomy Nights for this month - June 7th and 21st! That's 40 previously unavailable tickets. Book your slots now at denverastro.org/reservations @chamberlin-obs.bsky.social
denverastro.org
Astronomy Night Reservations at Chamberlin Observatory – Denver Astronomical Society
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 01/06/2025
#Denver #astronomy fans, come over to @chamberlin-obs.bsky.social tonight for some stargazing! I'll be there along with the physics students from @uofdenver.bsky.social and the lovely people from @denverastro.bsky.social . ✨🔭 Details --> www.denverastro.org
A red brick observatory building with a green door and a metal dome. It is dusk, the dome slit is open, and there are two bright lights on the outside of the building.
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Dr. Adeene Denton @spacewhalerider.com · 06/05/2025
I was asked to join in a series of blog posts about the importance of public lands, so I wrote about how the Grand Canyon, and the Solar System, is so much more than a checklist of things to see. It inspires us to ask questions, learn, and grow: www.grandcanyon.org/about/news/g...
grandcanyon.org
Former GCC Astronomer in Residence on the Importance of Public Lands
In this blog series, former Grand Canyon Artists and Astronomers in Residence reflect on the important role America's public lands play in art and science.
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Chamberlin Observatory @chamberlin-obs.bsky.social · 02/05/2025
Hey #Denver, come on over for some stargazing with @denverastro.bsky.social this Saturday night! ✨🔭 www.denverastro.org/events/open-...
denverastro.org
Open House: Jupiter! Mars! – Denver Astronomical Society
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Denver Astronomical Society 🔭 @denverastro.bsky.social · 01/05/2025
We just canceled a reservation for this evening, so we have FOUR TICKETS available immediately for tonight's Astronomy Night at 8:30 pm at @chamberlin-obs.bsky.social . Grab these now at denverastro.org/reservations! ***
DU's historic Chamberlin Observatory
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Chamberlin Observatory @chamberlin-obs.bsky.social · 05/04/2025
#Denver stargazers, join us SATURDAY 4/5 for our monthly open house and star party with @denverastro.bsky.social! The Moon 🌓 will look lovely near Mars and Gemini, and Jupiter 👑 is still hanging out with the colorful bright stars in Taurus and Orion. FREE and great for kids! See you there! ✨🔭
facebook.com
Open House Star Party at the Chamberlin Observatory
Party event in Denver, CO by Denver Astronomical Society on Saturday, April 5 2025 with 232 people interested.
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Kym @ The Evening Sky Map @skymaps.com · 30/03/2025
🌟 The April 2025 edition of The Evening Sky Map is ready for download at skymaps.com/tesm/. The PDF includes a Sky Calendar and user-friendly star maps for the northern and southern hemispheres, as well as equatorial regions. Please share and enjoy exploring the Universe! 🔭 #astronomy #stargazing
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 21/03/2025
Oh hey, happy equinox. For me it's always a nice reminder to ponder the interrelatedness of everything on Earth. The cosmos is lots bigger than us, but this is still the only home we know. What we do here matters.
earthsky.org
March equinox 2025: Here’s all you need to know
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Denver Astronomical Society 🔭 @denverastro.bsky.social · 12/03/2025
Due to a few cancellations, we have some last-minute availability for Astronomy Nights over the next week. Three tickets are available for Thursday, March 13, and two for Tuesday, March 18th. Book your visit today! www.denverastro.org/public-night... @chamberlin-obs.bsky.social
Overhead view of DU's historic Chamberlin Observatory.

Due to a few cancellations, we have some last-minute availability for Astronomy Nights over the next week. Three tickets are available for Thursday, March 13, and two tickets are available for Tuesday, March 18th.

Book your visit today!
https://www.denverastro.org/public-night-reservations/

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All Astronomy Nights start with a DAS lecturer’s informative, multi-media astronomy presentation. Astronomy presentations are designed for visitors of all ages and may be illustrated with colorful computer graphics shows, videos, and/or whatever audio/visual method is appropriate.

After the presentation, visitors may be treated to telescopic views of the moon, stars and star clusters, planets, galaxies, nebulae, etc., through Chamberlin’s historic, 28-foot long, 20-inch aperture Alvan Clark-Saegmuller refracting telescope (weather permitting). On cloudy nights, visitors will view and learn about the telescope and receive a tour of the observatory, including its various clocks, the meridian telescope, the library, wall displays, and an animated video display of the night sky for that month. DAS volunteers will happily answer questions about astronomy, astronomical observing, and the observatory.
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The Guardian @theguardian.com · 11/03/2025
Astronomers discover 128 new moons orbiting Saturn
theguardian.com
Astronomers discover 128 new moons orbiting Saturn
Planet now has 274 moons, almost twice as many as all the other planets in the solar system combined Astronomers have discovered 128 new moons orbiting Saturn, giving it an insurmountable lead in the running tally of moons in the solar system. Until…
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Denver Astronomical Society 🔭 @denverastro.bsky.social · 10/03/2025
What’s Up in Denver? March 10th through 16th, 2025 Total Lunar Eclipse, 3 Virtual Lectures, DAS Astronomy 101 begins, DAS Spring Banquet, the Gibbous moon makes its way across the sky, and more. www.denverastro.org/whats-up-in-... #denverastro #das #astronomy #eclipse
Graphic showing the Moon and M44 in the southern sky over Denver on March 10 around 10pm MDT
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Chamberlin Observatory @chamberlin-obs.bsky.social · 08/03/2025
TONIGHT!!! The planets await!
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Chamberlin Observatory @chamberlin-obs.bsky.social · 06/03/2025
Hey #Denver, join us for a #star and #planet party this Saturday! It will be chilly but clear, so bundle up and come on over to peek at Venus, Jupiter, Mars, and more! @denverastro.bsky.social members will be operating telescopes of all sizes for your viewing pleasure! ⭐🪐🔭
facebook.com
Open House Star Party at the Chamberlin Observatory
Party event in Denver, CO by Denver Astronomical Society on Saturday, March 8 2025
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Nevermore L. Hoffman 🐦‍⬛🎃 @astroprofhoff.bsky.social · 02/03/2025
Hello, Mercury! 🪶 #planets #astronomy
A twilight sky fading from dark blue at the top to pale yellow at the bottom, with black silhouettes of trees and houses in the foreground. At the top, Venus looks like a bright white dot, and a young crescent Moon is below it and to the left. Underneath them, almost to the horizon, a yellow arrow shows Mercury as a faint point of light.
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Phil PlAIt @philplait.bsky.social · 01/03/2025
Hey! All the planets are still visible tonight, and will be for one or two more (Saturn is getting lower and more difficult but Mercury is still getting higher, closer to Venus every night) so go out and look after sunset!
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Chamberlin Observatory @chamberlin-obs.bsky.social · 01/03/2025
Mercury ⚪ is hard to spot in the sunset glare. You'll need binoculars, a good sky app, and lots of patience. Venus 🌟 is still very bright in the west in early evening. Jupiter 👑 is to Orion's upper right and Mars 🔴 is to its upper left. Both are visible nearly all night. Let us know what you see!
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