OK it is really late here, but today's reveal of the first JWST image of the galaxy cluster SMACS-0723 was amazing, and I am still digesting it. There is so much stuff going on, it is absolutely breathtaking!
Just to get an idea of what an improvement this is over Hubble, over at The Robot Report, they show this beautiful side-by-side view of the previous best image taken with Hubble, and tonight's result. It's wild.
So, I guess the left is a Hubble visible spectrum image, whereas the JWST image is infrared, mapped to RGB color bands for display.
Reading about this, it looks like NIR only images 2-bands, roughly centered at 2μm & 4μm, not three, so they've remapped the colors in some way to generate the 3-band color image we see.
Not sure exactly how they do that, but I'd naively assume something like red = B, green=(A+B)/2, blue=A, where A is the 2μm band and B is the 4μm.
@TerryHancock No, RELICS is much newer, the IR images are taken with the WFC3/IR channel, in the filters F105W, F125W, F140W, and F160W. My guess is the image is some combination of (some of ) those.
Mastodon.ART — Your friendly creative home on the Fediverse! Interact with friends and discover new ones, all on a platform that is community-owned and ad-free. (翻译：DeepL)mastodon.art是艺术家和艺术爱好者的空间，而不是政治内容的空间--有许多其他的fediverse实例，你可以加入以获得更多的一般内容(而且你仍然可以从任何实例中关注你在.art上的朋友)；见https://instances.social :)