You take many long exposure photographs of the same spot in the sky, stack them together, and then edit the images to make them look nice. There is a ton of sp

You take many long exposure photographs of the same spot in the sky, stack them together, and then edit the images to make them look nice. 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