See my reply to BadgeHoarder! It's not the actual galaxy. That would have needed too long a shutter to keep my hand steady enough to be sharp. For lenses, you'll need anything with a wide aperture (lowest number F stop you can find). Or really just use the shutter in it's slowest setting. But that would have made my hand blurry and blown out the lume, likely.
Ha! This is a projection on my ceiling. I have photographed the galaxy and I would be impossible to have my arm in the photo and not look blurry or have the lume blown out unless I super imposed the two. For the galaxy, you'll first need to be in a place that has a no light pollution. Where it's possible to see the galaxy with your naked eyes. Then have a camera on a tripod and set it to the slowest shutter setting, like 30 seconds or whatever it can do. And you definitely don't want the moon there. Basically you need to amplify the light a lot and keep the phone as steady as possible so it's not blurry (tripod).
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