Any idea how they manage to get clearly defined nebulae in the skyscapes? I've never seen it before; is it a new technique, filter or a composite of smaller angle shots?
This type of photography has recently become much more approachable thanks to products like the SeeStar S50/S30 and the Dwarf 3. These are smarter devices that can find and image most anything in the sky for you. And they retail for under $500.
You won’t be as good as these photos or people who send $10k rigs to be remotely operated at Starfront[0] in Brady, Texas - but you’ll be impressed with what you can get from almost anywhere.
There is a ton of specialized equipment and software for the hobby - star trackers, astrophotography specific cameras, optics, camera control software, stacking software, and of course Adobe lightroom and photoshop
You can start out with just a digital camera/cellphone and tripod, and go all the way up to a full blown backyard observatory