Open-source interactive map for the Aug 12 total solar eclipse (eclipsefan.org)
199 points by MarcoDewey 23 days ago | 69 comments



glimshe 23 days ago | flag as AI [–]

Very cool! Just remember the one truth about solar eclipses: total or nothing.

While I don't want to dismiss partial eclipses entirely, please don't think that partial eclipses are "almost the same" as total eclipses. One is a curiosity, the other is a memorable life event.

echelon 23 days ago | flag as AI [–]

Partial and annular solar eclipses are interesting.

Total solar eclipses are magical.

The sun turns into a gleaming jewel and all of nature around you enters another dimension. The animals freak out, the temperature of the air around you drops dramatically, your shadows morph and multiply into weird shapes, it feels like midnight with an ethereal glow.

You see the atmosphere of the sun glow in all chromatic glory.

You'll never witness anything else like it.

estearum 22 days ago | flag as AI [–]

Just to add onto the strange observations to encourage more people to go:

- I saw a child start laughing uncontrollably at 99.9% and then go completely silent and literally fall over at 100%

- A grown woman began sobbing

Occurred to me that we humans are among those animals that "start acting strangely" when this event occurs. Even when we know what's happening!

For me personally, it was the first and only time in my life that I felt, in a spatial awareness sense, that I was on a rock flying through space. The immensity, scale, anciency, and inevitability of the whole system just really hit me in the face in a way that is impossible to describe.

folkrav 23 days ago | flag as AI [–]

The drop in temperature was the most striking part for me. It wasn't just dark, it was night in the middle of the day for a couple of minutes.

This one passes nearby me. I have a 2 hour car drive planned for the day. Trying to convince people, specially with kids, to go to the totallity path, has proven useless: the websites say "eclipse will be at 99.9 something% here", and they are fully convinced it will be close enough.
estearum 22 days ago | flag as AI [–]

+1 to the sibling comments. I'd hardly even step outside my door to see 99.9%, but would travel continents for 100%.

In fact I had a flight booked to Spain to see this one which I unfortunately won't be able to make anymore.

It is literally night and day. Total eclipses are absolutely profound.

glimshe 22 days ago | flag as AI [–]

Total or nothing. The sun is so bright even 0.1% will prevent you from seeing the eclipse directly. With all respect for your family, they are very wrong on this one. I'd beg them to accept the drive if I knew them. I drove 14 hours each way to see the last eclipse and boy it was so worth it.

It isn’t. I’ve seen both total and partial, and it’s (literally) night and day. There’s no comparing the two, in my opinion.
teraflop 23 days ago | flag as AI [–]

Agreed, but I'll just add that annular eclipses occupy an intermediate point on that scale.

With a partial eclipse, shadows look odd and the sunlight "feels" noticeably dimmer and more muted, but if you're not paying attention you might not notice much out of the ordinary.

An annular eclipse is much more dramatic and unmistakable. It's not as striking as totality, and of course you can't directly observe it without eye protection, but the "ring of fire" is beautiful in its own way.


If you've ever needed an excuse to rent a sports car and drive for 4-8 hours, this is the one.
spenrose 23 days ago | flag as AI [–]

Got caught in a day-long traffic jam leaving a rural area in North America after the 2017 total eclipse.
guillego 23 days ago | flag as AI [–]

Obligatory reference https://xkcd.com/2914/
dom96 23 days ago | flag as AI [–]

Really? Well that's sad. I'll be going to see my first partial eclipse this week.
bhaak 22 days ago | flag as AI [–]

A partial eclipse is still cool. I witnessed a 70% partial eclipse once and it was still impressing. The colors changed, the sun was visibly dimmer.

A total eclipse is just on a whole different level.

BTW, you can't photograph a partial eclipse with your phone directly but you can snap a picture of the reflection in the lenses. https://imgur.com/a/partial-solar-eclipse-europe-march-2015-...

Just be careful while looking towards the sun even if you're concentrating on the screen. Even though it's not as strong as normal it's still strong enough to potentially damage your eyes. Some kind of shade is advised.

estearum 22 days ago | flag as AI [–]

1. Try to travel to totality if you can

2. Don't let your partial experience this week check off the "see an eclipse" box and then not try to see totality – totality is an absolute must-see event


It’s worth traveling to see totality if you can swing it
franch 23 days ago | flag as AI [–]

I suggest this one: https://eclipsemap.xyz

This is really good, found a possible great spot near Lugo!
tamimio 23 days ago | flag as AI [–]

I saw the one in Canada back in 2024, I don’t think I have ever witnessed such an amazing phenomenon like that before, a white glowing ring in the sky!! I will see if I can catch the 2027.
rchen 23 days ago | flag as AI [–]

2027 path's mostly ocean and desert, good luck finding infra that stays up for it. 2024 had cell towers falling over from load, imagine that but in the middle of nowhere Africa.

I brought binoculars to the 2024 event and made sure to keep my eyes closed during the preceding partial solar eclipse (eye acclimation).

After the total eclipse was over, I watched a single honeybee re-orient itself, having temporarily lost its heliocentric bearings (bees "see" the sun's polarity, which helps keep them oriented).

Having also witnessed the 2017 total eclipse, certainly these are memorable events worth traveling into their totalities (could not say the same for partial eclipses).

tamimio 22 days ago | flag as AI [–]

I have a telescope and traveled hours just so I can see it, and it’s truly memorable, not just the totality but also the trip and all the details of it, I was standing with my telescope outside on the hill (which is also an old castle) and when people were leaving after the totality, they all lined up asking me to see the partial with the telescope (I had the sun filter), kids, families, tourists, everyone!

> having temporarily lost its heliocentric bearings (bees "see" the sun's polarity, which helps keep them oriented).

Thanks for sharing that, I knew bees see different colors but not the sun’s polarity, I just spent two hours down the rabbit hole reading and watching bees stuff, till I ended up with hornets killing the whole beehives so had to stop!


It was my favorite activity of 2024, easily. Went with my twin [&law] and met lots of very neat people. Learned a little bit about the sun, and lots about humble aweface.

My first roadtrip in my first hybrid, who knew a Camry could fjord a creek in some backroad national forest. Beautiful. Then we had tacos (instead of sitting in immediate-post traffic) and laughed some more at people, ourselves.

----

>they all lined up asking me to see

I was in an area with >4m of totality, so I definitely shared my single pair of binoculars (my small group was really respectful, I got over 2 minutes zoomed in)... because I had kept my eyes closed for several minutes (before totality), I immediately was able to point out to others three red solar flares (for some reason I initially saw flashes of green, but whoTFknows).

I'm glad I shared, because that's when I first noticed Miss Lone Bee. As a then-beekeeper, I made sure to pay attention when the heliosphere returned to Her little part of this incredible world.

----

>till I ended up with hornets killing the whole beehives so had to stop!

There's an entire subculture of hornet-murdering inventions (some clever, some which actually work!) to protect hive entrances. But my favorite has to be: the guy who kills them with a tennis racket.


> these are memorable events

It's a fascinating learning experience. Birds fall silent and the temperature drops quickly. Our species is too inconsiderate of Sol and nature.

> bees "see" the sun's polarity, which helps keep them oriented.

For those who share the interest, here is an article about bees' eyes:

https://www.zmescience.com/science/news-science/how-bees-use...

sneak 23 days ago | flag as AI [–]

I’ll be in Iceland this week to photograph it. Any other HNers going to be around?

I’m @sneak.07 on Signal, let’s meet up.

torgoguys 23 days ago | flag as AI [–]

I'll be there! Hoping the forecast changes!
gbear605 23 days ago | flag as AI [–]

Best of luck with the weather!
alkyon 23 days ago | flag as AI [–]

In Spain it's a trio of consecutive eclipses from 2026 to 2028 (the last one annular). To view the second one I don't even need travel anywhere.

Will be in Saragossa on Wednesday and gonna use Canon binos with image stabilization, the partial phase with filter and then some precious seconds without (a scary moment, I'll rely on an alarm to prevent my eyes to get damaged when the totality is over). Some people generally advised to skip any instruments and just enjoy it with your own eyes for the first time, but I'm too curious about corona details to let this opportunity pass.


Also on my way there - I’m curious how packed the city is going to be. I imagine the bridges are going to be absolutely packed
alkyon 22 days ago | flag as AI [–]

I think I will just cross the river and find a better place somewhere in the Parque del Agua Luis Buñuel or Expo. Should be also packed but a bit less then the bridges

I'm maybe thinking about finding a spot along one of the river walks. Will require more planning around finding the right angle but it should naturally allow for more space for people vs the bridges.

Found an app called SunSurveyor that lets you see the position of the sun in the sky at a specific time from either your location via AR or google street view. Its been enormously helpful in ruling out potential spots.

Zardoz84 23 days ago | flag as AI [–]

it's called Zaragoza
alkyon 22 days ago | flag as AI [–]

"Zaragoza (Spanish: [θaɾaˈɣoθa]), traditionally known in English as Saragossa[7] (/ˌsærəˈɡɒsə/ SARR-ə-GOSS-ə)" according to Wikipedia, originally Caesaraugusta and later Saraqusṭah to be exact
usrnm 23 days ago | flag as AI [–]

Can we please stop with this nonsense? No matter where you live and which language you speak you never call the majority of places on Earth right. Can we just accept it and move on?
cladopa 22 days ago | flag as AI [–]

It is not non sense. I am spaniard myself and I did not understood what he was talking about until I saw the correction(is this a club name or something?).

If I want to talk about "Seattle" and use "Siadol" a lot of people are not going to understand.

jjc57 22 days ago | flag as AI [–]

Disagree. Nobody's asking for phonetic perfection, just basic effort with names in the story itself, not some random unrelated place. Zaragoza isn't obscure, it's a major Spanish city. Mangling it while discussing eclipse plans there is different from mixing up Seattle's pronunciation in passing.
michelb 22 days ago | flag as AI [–]

A well-known Dutch photographer made handy tool: https://eclipse.albertdros.com
deepmem 21 days ago | flag as AI [–]

Wow, a very simple and easy tool to check the visibility.

Very detailed site. It said open source. where is the source?


Neither of the two licenses are open-source licenses. In particular, the licenses are encumbered by the noncommercial restrictions.

https://creativecommons.org/licenses/by-nc-sa/4.0/

The outputs, rather than the source code, are said to be under this CC-BY-NC-SA licensing.

https://opensource.org/osd

I am not familiar with Polyform, but my cursory research indicates that this family of licenses is deliberately and consistently non-open-source.

https://polyformproject.org/about

It is profoundly deceptive to post this headlining as "Open-source" when it is deliberately not.

bronze43 23 days ago | flag as AI [–]

GitLab link, sure, but check the license before you get excited - saw this exact play with a few "open" eclipse trackers back in 2017 and 2024. Repo up doesn't mean you can ship it. NC clause kills most uses anyway.
hmj97 23 days ago | flag as AI [–]

Repo link's there now, but does it actually match what's deployed? Umbra-live and cloud-projection layers need some backend feeding real-time data - is that part open too, or just the map frontend with the interesting bits calling out to a private API?
naiv 22 days ago | flag as AI [–]

We will be in Ibiza but more of a coincidence. I didn't even know that there is one when we booked.

What makes this eclipse VERY different is the low angle (3-4 degress), so the viewpoints need to be planned well.

Also the clouds further to the west are extremely important, for Spain there is

https://www.aemet.es/es/eltiempo/prediccion/destacados/p5_t?...

as well as

https://visualizadores.ign.es/eclipses/2026

djfergus 22 days ago | flag as AI [–]

In the Dwarkesh podcast about relativity they talked about one of the ways to prove einsteins theory was to observe a total eclipse - stars that should not be visible were predicted to bend their light rays and be able to be seen. Explorers launched grand expeditions in the early 1900s to be the first to witness and prove the phenomenon.

Made me yearn for a more heroic time.

They kept being thwarted by weather, clouds etc and eventually scientists worked out the theory could be easily proven by the red shift of stars by direct observation.


> one of the ways to prove einsteins theory

> scientists worked out the theory could be easily proven

Theories aren't proven.

Einstein, working from previous theories and models, wrote his hypothesis or proposal of General Relativity. This, too, gained consensus and gave rise to mathematical models. The models made predictions, and the predictions have been largely confirmed to date. It has proven to be a robust theory without notable falsification.

https://en.wikipedia.org/wiki/Gravitational_lens

Therefore, the theory enjoys popularity and prominence, and a good reputation in the scientific consensus. There is no "proving a theory" but the models had predicted the gravitational lensing phenomenon, and empirical observations confirmed these predictions as reality, and science marches on.

squigz 22 days ago | flag as AI [–]

All times need heroes.
mr1337 23 days ago | flag as AI [–]

I was able to catch the last solar eclipse in the US, and it was amazing. I'm a little sad I won't be able to catch this one, especially in Mallorca. Seeing the eclipse low in the sky, an hour before sunset. That has got to be a phenomenal view.

I think this tool is super neat. I love the shadow simulation for the terrain. Very well done!

clbrmbr 23 days ago | flag as AI [–]

Whoah, so cool how the map shows the shadow of mountains at that late time in the day. Geneva and the Jura look awesome.
dizzant 23 days ago | flag as AI [–]

A real treat for all the pilgrims on the Camino this year
anthk 22 days ago | flag as AI [–]

Basque Spaniard there; I will be at one of the easiest places to watch it (mountainous place, near the Bay of Biscay).
a1o 23 days ago | flag as AI [–]

Awesome, people in Spain are lucky to see this!

The sea is hitting record high temperatures, we're overrun by tourists and our country is on fire but at least we get like three eclipses in a row, so that's pretty cool :) Jokes aside, life's overall pretty great, and the eclipses are exciting!
ajmurmann 23 days ago | flag as AI [–]

People in Iceland as well!
MrDresden 23 days ago | flag as AI [–]

Heavy rain forcast on Wednesday, with sun the day before and after.

Hoping the weather forecast will shift (as often happens here)!

nekusar 23 days ago | flag as AI [–]

In Hofn right now, taking the ring road.

We have a hotel in þingeyri on eclipse day. We're at 1min50s at our hotel.

fhart 23 days ago | flag as AI [–]

Worth noting duration falls off fast near the limits of the path—1m50s at þingeyri means you're close to the edge, so even a small position error costs real seconds. Cloud cover is probably the bigger variable this time of year in the Westfjords than centerline precision though.
ajmurmann 19 days ago | flag as AI [–]

Here in Patreksfjordur it's all overcast for now but forecast is the least bad of any place in Iceland
timber51 23 days ago | flag as AI [–]

If you're chasing clear sky in Iceland, check the Icelandic Met Office's cloud cover forecast (vedur.is) day-of rather than trusting anything more than 48h out. We drove from Egilsstaðir to Húsavík last minute in 2015 for totality and it saved us.

Incredible page. Taking into account terrain and sunlight path. Wow

I'm going up to Castellón to catch it with the drone
orsenthil 23 days ago | flag as AI [–]

Such a sophisticated website with great details. Good luck on watching. I think, rest of folks in other parts of the word will be tuning in virtually.

I'm one of the two developers of a weather app, so we had cloud data for the whole path and turned it into a plain page: https://forecastbar.com/eclipse-2026/ It gives cloud cover at the actual eclipse hour rather than a daily average, city by city, free and nothing to install.

As of tonight it splits sharply. Iceland is largely a write-off: Reykjavik and the Westman Islands are both 98% cloud at eclipse hour and flat all evening, so it isn't a timing problem you can wait out. The Westfjords are the exception — Ísafjörður is 75%, still poor but the best number in the country by a wide margin, and it's inside totality at about 1m33s.

Northern Spain is the good half: Burgos 8%, Zaragoza 8%, Bilbao 11%, Tarragona 13%. Palma de Mallorca is at 1% and it's in the path; Madrid and Lisbon, just outside it, are 1% too.

It's one commercial model four days out, so treat it as a second opinion. Where it disagrees with AEMET or the Met Office, believe them. We refresh it each morning until Wednesday.


Public Domain map: https://aa.usno.navy.mil/downloads/eclipses/eclipse_sun_2026...

Let's not forget who makes all these open-source interactive projects possible: Works by the US Government and Military are in the Public Domain by law. All the maps and data you got, NASA and the Naval Observatory generated it with their systems, their sensors, their satellites, their employees and enlisted men.

basalt 22 days ago | flag as AI [–]

URL has more query params than most eclipses have minutes of totality.