New development: Wikipedia has deprecated archive.ph/is/today, and will eventually remove hundreds of thousands of existing links. Massive thread here: en.wikipedia.org/wiki/Wikiped... (and FWIW I just verified the malicious code is still active on the captcha page)

Here's a full-disk view of Sun as it appeared yesterday. We were so excited capturing the filaprom that we let the full disk view go. This really shows off the extraordinary prominence activity that was going on midday, February 16! #sun #astronomy #solarobserving

Very clear solar physics bubble next to "Professional Astronomers & Astrophysicists" #heliophysics

Farewell to Active Region 4366 -- Giant sunspot complex seen in Sun's northwest. The region continues to issue flares but is showing signs of decay. Soon the sunspot will disappear over the Solar limb. Sky was clear, and winds were light, but seeing was not good. We take what we can get! #sunspots

It's good to talk about your love for Wikipedia. It's good to donate. But I firmly believe that it's even better to become an editor. Create an account. Make an edit (don't worry, you can't break things). Visit the Teahouse. Not necessarily in that order.

Here is how I have been contributing to Wikipedia in 2025. Happy New Year! #wikipediaYIR

The atomic ensemble time scale at the NIST Boulder campus has failed.

A sunspot group over about an hour on 2022-09-03. It starts showing the photosphere on the "blue side" (shorter wavelength) of H-alpha, then shifts into H-alpha and finally goes back to the photosphere on the "red side" (longer wavelength). #sun #sunspots #hydrogenalpha #astronomy

A few adjustments in data capture parameters was all it took to make a big difference in image processing and results! We're very pleased with Barlow-boosted views though we're still having some issues with achieving even lighting across whole-disk views... #sunspots

This long read in The Verge does a remarkable job of describing how Wikipedia's editing community works, the project's strengths and weaknesses, and the threats it faces. www.theverge.com/cs/features/...

Testing this with SDO/AIA imagery of a series of eruptions from 2023 ☀️

What might we expect to see during @esa.int Solar Orbiter's upcoming remote-sensing windows; now with an inclined orbit. Here's the PFSS connectivity of Orbiter during the remote-sensing window of spring 2026 (17th Feb to 6th March), using the current coronal magnetic field and in-situ wind speeds.

Not the usual Sun I study

We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers. The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.

It's an exciting time as we ramp up the data reduction pipeline. Here's the first of several items about the legwork we've done as the science team prepares to execute our science! 🧪☀️

Our recent solar flare research was published! We present the first spectral observations of ‘Supra-Arcade Downflows’ (SADs) since 2003. SADs are dark finger-like downflows seen above solar flare loops, but their origins remain elusive! What do we find? 1/6

Check out this recent article I was a co-author on: "Citizen Science in Space and Atmospheric Sciences: Opportunities and Challenges" link.springer.com/article/10.1... Here's a thread of the main points outlined in our paper! #heliophysics

Happy pride month to my fellow weather and space nerds. Go be happy and be you 💕🥹

Seven million articles on English Wikipedia! Lots of work still to do. en.wikipedia.org/wiki/Wikiped...

Small steam devils forming from the fog above a pool (water temp was 76°F and outside air temp was 56°F)

Scientific publications do not exist in a vacuum. This means misinformation can sometimes make your climate science go viral for all the wrong reasons. Here are some tips for navigating the nightmare. eos.org/opinions/whe...

Maybe this is old news, but you can completely block Writefull AI in Overleaf by using uBlock Origin with the rule: www.overleaf.com writefull.ai * block and the filter: www.overleaf.com##.ol-overlay.writefull-error-notification.notification-type-error.notification

This is the extent to which the aurora was seen one year ago today during the May 2024 extreme geomagnetic storm. It was one of the largest aurora events in all of recorded history, actually. The different colors of dots represent the dataset used to log the reports.

The day the #sun stood still... Very good seeing this morning. Image of huge spot group 4079 with #takahashi Mewlon 210 at f/24, Player One Neptune M camera. #astronomy #astrophotography #solarsystem #spaceweather

In homage to Earth Day, here is an acrylic on illustration board painting I did in the 80s. I used then newly released dim light satellite images for references of nighttime features such as the aurora and the brighter gas flares and agricultural burning competing in brightness with the city lights.

😎The Solar Patrol Service (SPS/ASUCAS) from Astronomical Institute of the 🇨🇿 Academy of Sciences captured a prominence eruption on Mar 28, 2025 in high cadence and large field of view Hα 🔭images (NE quadrant). Daily 1-h Hα images Latest&Archive👇 🌐https://swe.ssa.esa.int/web/guest/sps-S019a-federated

We released our first light images! Here's a nugget entry about it, with links to the official mission blog and two press releases. ☀️🧪🔭🛰️🚀

Wikipedia editors have decided: www.404media.co/wikipedia-ed...

I just realized that the CU Boulder guest Wi-Fi default gateway is blocking all of my NTP packets... so I am right next to NIST physically but am not allowed to synchronize with their public time servers? 128.138.140.44 is utcnist.colorado.edu

Petabytes of critical government research that is marked for possible deletion cannot be archived because of technical and legal restrictions, meaning it is very likely to be lost forever: www.404media.co/nih-archives...

Astrophysicist Joan Feynman was born #OTD in 1927. She explained the origin of auroras, discovered that coronal mass ejections could be identified by the amount of helium in the solar wind, and elucidated the structure of Earth's magnetosphere. 🧪 🔭 👩‍🔬 ⚛️ Image: Charles Hirshberg

NASA's EZIE-Mag program lets students conduct science in concert with the EZIE space mission to study the aurora. Apply for your free magnetometer today: eziemag.jhuapl.edu #ITeachPhysics

Hα flare ribbons observed between the two peaks of a double-peak soft-X-ray flare of GOES class X1.0 and M7.3 on 2024 June 1. ☀️ #astrophotography

The stretch of road connects NCAR, NOAA, NIST and the University of Colorado-Boulder. Homes to people doing some of the most important research on Earth and its warming climate. I commuted this exact stretch of road on a free bus for 3 years and this video hit me smack in the feels.

New Moon illuminated by earthshine visible in non-operational GOES-19/CCOR-1 data from 27 February 2025 via @noaa.gov ☀️🔭

I’m at the Solar Dynamics Observatory (SDO) conference this week, discussing science from the spacecraft responsible for most of the space-based Sun images you’ve likely seen! But it’s not all pretty pictures, as SDO continues to produce fantastic science, 15 years since launch.

Wikipedia is rolling out anonymity features piloted in countries with authoritarian governments in the US & is making a change to not show editor IP addresses in response to a global "increase in threats" from Elon Musk, Heritage Foundation, and governments www.404media.co/wikipedia-pr...

I wrote for Slate about how a conservative think tank plans to "identify and target" Wikipedia editors who it claims are abusing their position—a dangerous escalation that shifts the fight from debating edits to going after the editors themselves. slate.com/technology/2...

A period of partly-cloudy sky allowed a Sun shot near noon today. The temperature was 31℉, light ground winds, and seeing was generally good -- between clouds! A giant sunspot complex dominates the northern solar hemisphere. #sunspots #sun #solarobserving #solarimaging #astronomy #spaceweather

Here is an eruption over the Sun's northwestern limb observed in SDO/AIA's 171 Å passband a couple of years ago. Found this when I was cleaning an SSD, so I thought I'd share. (Footage courtesy of NASA/SDO and the AIA science team.) ☀️🔭

I have finally dropped the open source for the data of the October 10th 2024 aurora data collection from social media. This can used via CSV/KML/KMZ and coded into whatever data you see fit. A major improvement compared to the Gannon event is every single point now has UTC times.

This diagram I made and uploaded to Wikimedia Commons when I was 16 ended up being used in a peer-reviewed popular-science book. I dislike how the diagram turned out in hindsight, but I am flattered that someone decided it was usable for publication.

The Indian solar mission #AdityaL1 ☀️ has made their data freely accessible through the ISSDC website. More data will be available following lock in periods. Aditya-L1 Mission: www.issdc.gov.in/adityal1.html ISRO Science Data Archive: pradan1.issdc.gov.in/al1/ (via Dibyendu Nandi @ydnad0 on X)

KICK OFF THE NEW YEAR WITH THE INTERNET ARCHIVE! 🍾 Starting at 12:01am ET, we'll be revealing the creative works from 1929 and sound recordings from 1924 that are entering the public domain in the US. Learn how you can celebrate throughout January: blog.archive.org/2024/12/26/c...

A nice Xmas present from ApJ: our solar coronagraph theory paper was accepted on 23-Dec! I just submitted an e-print to the ArXiV. Among other things, we explain the anomalous nearly-achromatic diffraction fringing seen in most modern coronagraph images (it's modified Fraunhofer diffraction). 🔭☀️🎢⚛️

I've found a clever workaround for staring at the sun. I spend all day looking at its light as it reflects off other objects.

Here is how I have been contributing to Wikipedia in 2024. This year I also worked on two research projects at LASP, completed my 2nd and 3rd semesters of college, and started a UROP-funded assistantship. It was a productive year for me personally. #wikipediaYIR

Happy holidays ☀️ (Data were acquired by GONG instruments operated by NISP/NSO/AURA/NSF with contribution from NOAA; see alt text)