#sunspot — Public Fediverse posts

Here we go again ... another #Bochum #sunset today, and the three #sunspot groups (1)4515, 13 and 17 - https://www.facebook.com/groups/seestar/posts/1065357899609825/ - conveniently placed in the clear strip.

Against all odds another pretty clear #sunset in #Bochum Tuesday - and now three #sunspot groups are evident near the disk's center, from the left (1)4515, 13 and 17: https://spaceweather.com/images2026/25aug26/hmi1898.gif

Today's #Bochum #sunset with the three #sunspot groups left to right (1)4498, 4496 and 4492: https://spaceweather.com/images2026/29jul26/hmi1898.gif

I can (barely) see a #sunspot just on my phone camera thanks to the thick smoke.

After missing three #sunsets in #Bochum, here is today's - with THREE #sunspot groups on the disk now: top left to bottom right they are 4492, 4493 (which grew rapidly; see https://nitter.net/Bermani22/status/2079227596554809584) and 4489. Watch the last two disappear in later timesteps in https://bsky.app/profile/cosmos4u.bsky.social/post/3mr45ljgazc2e (where 4493 is misidentifed - because of https://spaceweather.com/images2026/20jul26/hmi1898.gif - as 4491).

During today's #Bochum #sunset the big #sunspot (1)4482 was seen in the lower right while at "10 o'clock" - above the church spire - the new group (1)4489 has just appeared on the disk. Later timestep: https://bsky.app/profile/cosmos4u.bsky.social/post/3mqkjezmlp22g

Standing oscillations in a resonant #sunspot atmosphere captured by integral field spectroscopy: https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2026.1826789/full -> "These results demonstrate the suitability of solar integral field units for spatially mapping sunspot wave properties, with the NaID1/D2 lines providing a novel vantage point for resonance cavity and energy flux diagnostics in the lower solar atmosphere."

Región activa AR4482 que recientemente tuvo una llamarada solar tipo M4.0 con radio-emisiones tipo II y IV con eyección de masa coronal y todo #sol #sun #ar4482 #sunspot #kasaiJscope80L #kasai #telescope #refractor #japan #jscope80L #achromatic #doublet #uruguay

Acá una un poco más detallada de la monster sunspot AR4478 #sun #sunspot #svbony #svbony205 #achromatic #doublet #kasai #kasaiJscope80L #jscope80L #japon #japan #telescope

The two #sunspot groups 4478 (below) and 4479 right after #sunrise in #Bochum, Germany, minutes ago - two further timesteps in https://bsky.app/profile/cosmos4u.bsky.social/post/3mpn3yanylk2e

The two big #sunspot groups today around 15:00 UTC, taken with a #BridgeCamera: see https://skyweek.wordpress.com/2026/06/28/allgemeines-live-blog-ab-dem-28-juni-2026/#Jul01 for the exact technical data.

One of the largest #sunspot groups of the current #solar cycle, AR4478, here as imaged today from Hoogstraten, #Belgium. It sits pretty much at the center of the solar disc at this moment. And it's really big, about 16 Earth diameters from side to side!
#astronomy #science #astrophotography

The #sunspot-littered #Sun at 14:42 UTC today, taken with a #BridgeCamera at high (slightly digital) zoom through old aluminized-mylar eclipse glasses: four of the 6 current groups - https://spaceweather.com/images2026/29jun26/hmi1898.gif - are easily seen, big 4478 and 4479 well resolved into umbra and penumbra and small 4480 and 4475.

Since the sun is going to be pounding us all week, we might as well get a good look at it! Here’s an image I captured from Brooklyn this morning with my Dwarf 3. The massive sunspot region on the sun’s upper half is AR 4478, about 10 times as wide as Earth, with a smaller sunspot group AR 4479 below.

More info and an amazing closeup view here:

https://apod.nasa.gov/apod/ap260628.html

And check out @appagalcrochet’s video:

https://mstdn.social/@appagalcrochet/116812200545139050

#photography #astrophotography #sun #sunspot

#AR4478: Giant #Sunspot Group
#Astronomy #Picture of the Day

https://apod.nasa.gov/apod/ap260628.html

#APOD #Sun

RE: https://mastodon.social/@PlanetariumBochum/116813523474807512

The #Bochum #sunset on 25 June, with several #sunspot groups - AR 4478 at 10 o'clock: https://bsky.app/profile/vincentledvina.bsky.social/post/3mp4yl543zs2z

Massive Active Region 4478 coming into view on on Southeastern Limb of the Sun!

https://youtube.com/shorts/_f6iOv0zxfg?is=E-A0iRFMUOLVbSFh

#astronomy
#sun
#nature
#astrophography
#photography
#smartphoneastronomy
#sunspot
#activeregion4478
#spaceweather

Today's #Bochum, Germany, #sunset, with the #sunspot group (1)4475 prominent on the disk.

A large #sunspot group's emergence and growth has been captured by Solar Orbiter watchig the far side of the Sun - the region is expected to rotate into Earth-view on 24 June: https://www.facebook.com/photo/?fbid=1423989686421557 (SWPC forecasters will then be able to fully analyze the region and adjust solar activity forecasts if needed).

#Space junk falls back to Earth faster as #sunspot numbers climb
Objects lose altitude faster once sunspot counts reach roughly 70% of their cycle peak
As #solarcycles reach their peak — signaled by numbers of sunspots appearing on the #sun’s surface — #satellites and other objects in low Earth orbit lose altitude more quickly. Understanding the sun’s role in orbital decay could be a boon to space operations planning, the team says.
https://www.sciencenews.org/article/space-debris-altitude-loss-increase
https://archive.ph/W9JDh

Multiple flares with associated coronal mass ejections (CMEs) have been observed over the past 24 hours, originating from Solar Active Region 4455, shown here. "Closely-spaced impacts on June 5th could produce strong G3-class geomagnetic storms," reports SpaceWeather .com, "with auroras in Europe and the USA at mid-latitudes." Of course, we are expecting cloudy skies, here in Northeast Ohio, when the aurora may occur. #spaceweather #aurora #sun #sunspot #solarastronomy #astronomy

At least five #sunspot groups are visible in this #sunset snapshot from #Bochum, Germany, today (note the newly visible big one at the limb at 11 o'clock) - see https://bsky.app/profile/cosmos4u.bsky.social/post/3mmugamvd422a for several other timesteps!

It can be hard when you see pictures of sunspots to really grasp their size...which is why I like these kind of visualizations!

This is video captured by #SDO from July of 2017 -- and we can see the size of earth vs a sunspot!

How big/small to sunspots get?? Check out our most recent #podcast episode for the answer: https://starrytimepodcast.podbean.com/e/asterism-maria-mitchell-and-sunspots/

📹 :https://starrytimepodcast.podbean.com/e/asterism-maria-mitchell-and-sunspots/

#sunspot #NASA #Astronomy #astrodon #space #science #SDO #Solar #Sun #gif

Today's sun 🌞

To learn more about those #sunspots -- check out this week's #podcast here: https://starrytimepodcast.podbean.com/e/asterism-maria-mitchell-and-sunspots/

For more of today's sun & these images: https://sdo.gsfc.nasa.gov/data/

#sun #solar #sunspot #science #astronomy #AstroDon #astrophotograhpy #NASA #SDO

☀️ 30 March 2026 The eruption came from a magnetically complex #sunspot group now rotating further into Earth's view — meaning any continued activity could have more direct impacts ☢️ on Earth and #Artemis 2 https://www.space.com/astronomy/sun/powerful-x-class-solar-flare-triggers-radio-blackout-ahead-of-artemis-2-launch

#RadiationProtection #HumanSpaceflight #SpaceWeather

I know I've shared this one a lot lately, but so help me I just love the energy of this piece, which I've been playing around with a bit; lo, a slightly softer and brighter version of my sci-fi caprice "Reach for the Light" (yes, those are solar sails in silhouette).

#art #digitalart #digitalpainting #painting #solarsail #spaceflight #scifi #sciencefiction #star #sun #sunspot #spaceart

Quick Astro Fact - Sun

https://youtube.com/shorts/n5KyZsxRMng?si=55rYPxJwSz96nDbX

#astronomy
#sun
#sunspot
#educationalshorts
#photography
#astrophotography
#smartphoneastronomy

Oh I'm sure it'd take the mother of all tinted windows to stop it from blinding you, but imagine being on a solar sail, making a fly-by to gain speed to your final destination, and then seeing *this* out your window. The ultimate scenic route, in my own painting, "Reach for the light".

#art #digitalart #digitalpainting #painting #scifi #scifiart #spaceart #spaceflight #solarsail #spacecraft #sun #star #sunspot

Witnessing Magnetic Reconnection in Tangled Superpenumbral Fibrils around a Sunspot: https://iopscience.iop.org/article/10.3847/1538-4357/ae12e9 -> Astronomers See Braided Magnetic Fields Above a #Sunspot: https://aasnova.org/2026/03/11/astronomers-see-braided-magnetic-fields-above-a-sunspot/

#ActiveSunspotRegion4366 Crosses the #Sun
#Astronomy #Picture of the Day

https://apod.nasa.gov/apod/ap260208.html

#APOD #Sunspot