stellalunaobs.bsky.social - Profile | ThreadSky | a Reddit-style client for Bluesky

We squeezed in this morning's Sun shot just before cirrus clouds came in to lower the already-mediocre seeing. Active region 4058 is the most distinctive photosphere feature right now, both for its visual interest and activity. It has the potential for medium-strength M-Class flares. #sunspots

submitted 1 day ago • 0 comments

The entire month of March 2025 in the Sun’s atmosphere, observed in extreme UV light by the SDO and GOES/SUVI spacecraft. Last month saw the lowest sunspot numbers since March 2024, adding weight to the argument that solar maximum has likely already passed! #spaceweather

submitted 7 days ago • 4 comments

And we have an official designation! Comet C/2025 F2 (SWAN) Ephemeris and other data here: cobs.si/comet/2619/ 🔭

submitted 1 day ago • 2 comments

Seems legit!

submitted 1 day ago • 0 comments

As soon as you see the green behind the door, you already know what’s about to happen 🌌💚

submitted 2 days ago • 26 comments

Better lighting choices are more attractive, use less energy than other products, and help keep stars visible in our night skies. Check this out for more information: darksky.org/what-we-do/d...

submitted 7 days ago • 0 comments

The gutting of HHS and the CDC will literally and directly lead to the sickening and deaths of millions of Americans, and many more globally. Far more than that will suffer needlessly. This is horrific.

submitted 9 days ago • 271 comments

Today was a rare day with views of Sun. We got a nice look at the sunspot in active region 4048, reported to be growing and the source of M-class solar flares. More days of clouds and rain ahead but it was good to see that our local star is still shining! #sunspots #solarobserving #astronomy

submitted 9 days ago • 0 comments

Latest from our observatory maker: "The [shipping] broker advised me to wait until the 2nd of April USA time to see what extra paperwork there might be under Trump's tariffs." It appears to us that our tariff-loving President's "Liberation Day" will mean more money liberated from our bank account.

submitted 9 days ago • 0 comments

Welcome to British Summer Time. (aka Daylight Saving Time, in the USA)

submitted 11 days ago • 0 comments

The campaign has got some media coverage today, thanks to @ryanjfrench.bsky.social’s brilliant article www.space.com/space-explor...

submitted 17 days ago • 0 comments

29 March: New Moon at 10:59 UT (now). Start of lunation 1265. The next few days are a great time for evening stargazing. Download The Evening Sky Map (PDF) from skymaps.com/tesm/ and enjoy exploring the Universe using just your eyes, binoculars or a telescope! 🔭 #astronomy #stargazing

submitted 12 days ago • 0 comments

In case you missed it, my new book with @chroniclebooks.bsky.social came out this week!! I’m very pleased with it and I hope you will be too! A series of 40 essays walking you through the stars and what we’ve learned from their light! 🧪🔭 #booksky Bookshop: bookshop.org/p/books/fort...

submitted 13 days ago • 2 comments

March 25, 2025 — “Gaia’s control team at ESA’s European Space Operations Centre carefully switched off the spacecraft’s subsystems and sent it into a ‘retirement orbit’ around the Sun.” The new orbital path clears Gaia’s valuable Lagrange point slot for future spacecraft. www.esa.int/Enabling_Sup...

submitted 13 days ago • 0 comments

Space sustainability in today's @nature.com: 🛰️ How satellite constellations & #astronomy can learn to get along www.nature.com/articles/d41... 🛰️ Next steps for dark and quiet skies www.nature.com/articles/d41... 🙃 Stop Dropping Space Debris On Our Heads www.nature.com/articles/d41...

submitted 23 days ago • 7 comments

Two sea-dwelling dolphins greet four land-dwelling humans upon their return from a trip above the sky - two of the humans are Navy pilots who left our home world in a spaceship named #Calypso ..... #Cousteau #Astrobiology #Oceanography #Crew9 @ExplorersClub

submitted 22 days ago • 1 comment

Yesterday's Sun was worth a look! There's a nice scattering of sunspots to be seen with the northern hemisphere of Sun becoming more active now than the southern. There's speculation about another period of activity due to the shift. 1/2

submitted 26 days ago • 1 comment

Running on very little sleep this morning, we wanted to share our finished photo of the total lunar eclipse at maximum. The top of Moon's disk -- near the edge of Earth's deep shadow -- was much brighter than we expected and it was interesting to watch the light shift as the eclipse progressed.

submitted 27 days ago • 0 comments

Maximum eclipse achieved! I don’t think I’ll stay up much longer but it’s been grand seeing this total lunar eclipse through to its max! // #TotalLunarEclipse

submitted 27 days ago • 0 comments

Just a few more minutes til maximum eclipse!

submitted 27 days ago • 0 comments

As is often the case, the cameras are boosting color as well as brightness. To the unaided eye, lunar totality is dim and the color quite muted. Not the prettiest I’ve seen but very nice. And I like what the cameras are showing!

submitted 27 days ago • 0 comments

Totality has begun. On schedule, too!

submitted 27 days ago • 0 comments

The eclipse is progressing apace! And I’m even awake for it!!

submitted 27 days ago • 0 comments

Tonight’s eclipse details here: stellalunaobservatory.space/2025/03/13/a...

submitted 27 days ago • 0 comments

With clear skies forecast and a 41° low temperature, the weather is expected to be favorable, though timing brutal, for tonight's total lunar eclipse. wordpress.com/post/stellal... Image Credit: NASA Scientific Visualization Studio

submitted 28 days ago • 0 comments

Tim Berners-Lee proposed a hypertext system that would sit atop the internet #OTD in 1989, and now we all live in it. So happy 36th birthday to [sweeps arm in grand gesture to reveal this Hieronymus Bosch tableau of the damned] the world wide web. 🧪 Image: Tim Berners-Lee / CERN

submitted 29 days ago • 10 comments

Very crunchy and satisfying. Ceres is part of a complete and balanced breakfast!

submitted 28 days ago • 0 comments

The Vera C. Rubin Observatory, funded by the U.S. National Science Foundation and the U.S. Department of Energy’s Office of Science, has achieved a major milestone with the installation of the LSST Camera on the telescope. This camera is somewhat larger than the one on my telescope.

submitted 29 days ago • 1 comment

Take a look — nearly straight up — tonight and you should see a little reddish “star” near the moon. It’s planet Mars. Both Moon and Mars are in the constellation Gemini tonight. You won’t have trouble spotting bright planet Jupiter west of Moon and Mars. It’s a beautiful night, enjoy!

submitted 32 days ago • 0 comments

There is no astronomical reason for daylight saving time but there are good arguments against it. We hope to see a day when we revert to standard time year 'round. In the mean time, remember to set your clocks ahead one hour tonight and read Mark Boslough's excellent thread ⬇️

submitted 32 days ago • 0 comments

There are reports The White House is considering a 50% cut to NASA’s science programs, and 25% of its overall budget, which would be catastrophic for both current and planned missions. But, there is still time for the administration to reconsider. Read our full statement ⬇️

submitted 34 days ago • 14 comments

Taking our Sun shot today during a break in the clouds at midday, we enjoyed a temperature of 52°F, powder-blue skies, brisk winds. Seeing was surprisingly good. #sunspots #sun #solarobserving #solarimaging #astronomy #spaceweather

submitted 36 days ago • 1 comment

A break in the clouds, temperature at 56°F, moderate winds, and very good seeing for today's Sun shot. #sunspots #sun #solarobserving #solarimaging #astronomy #spaceweather

submitted 37 days ago • 1 comment

Someone on Reddit described the mood in the USA as “imagine you’ve been diagnosed with cancer, and half your family is cheering for the cancer” and that feels about right

submitted 65 days ago • 1 comment

Taking advantage of a rare, clear morning, our Sun was seen in a deep blue sky, between passing areas of cloud. Nice 36°F temperature, light winds, and excellent seeing. #sunspots #sun #solarobserving #solarimaging #astronomy #spaceweather

submitted 38 days ago • 1 comment

Sunday funnies… www.gocomics.com/brewsterrock...

submitted 39 days ago • 0 comments