alt Hacker NewsThere is in fact no photograph of treetops glowing.
There is a digital UV-wavelength video of the corona, and a visible-wavelength video of the trees.
The paper [1] contains a sole picture with tiny circles indicating where the UV-video detected corona events, overlaid over a frame of the visible-wavelength video.
The paper does also contain a video [2] which overlays a somewhat processed version of the UV video over the visible wavelength video, where UV photon events are indicated by decaying red dots.
[1] https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL11...
[2] https://agupubs.onlinelibrary.wiley.com/action/downloadSuppl...
Replies
Sorry, in what way is this not a photograph? Are you saying that a video is not a sequence of photographs, that UV photons captured by a sensor don’t count because human retina sensitivity is low in that range, or some hopefully-less-semantic argument?
I've taken the "captured on film" out of the title above and used representative language from the article. If someone can suggest a better (more accurate and neutral) title, we can change it again. (But the subject is interesting whether on film or not, let alone "for the first time".)
While we're being unreasonably pedantic, it also wasn't caught on film because it was a digital camera.
[dead]
That's some weird semantic nitpicking.
Wikimedia has a category of "photographs of the Sun":
https://commons.wikimedia.org/wiki/Category:Photographs_of_t...
Do you think they are not photographs of the Sun because these are not what I see if I look at the sun with my eyes? (In which case I'll see pure white then perma black, I assume.)