If you're in North or South America, you'll be treated to a total lunar eclipse! The Camera app will lock the autofocus and let you manipulate the exposure before you take the shot. Use the brightness slider that appears to reduce the amount of light your iPhone camera is taking in. Use Your Apple WatchRather than mess up the shot by touching the iPhone to take the picture, use the camera app on your Apple Watch to take the pic. Just pop open the app and press the shutter button like you would with the camera app on your iPhone.
Source: Forbes January 19, 2019 13:00 UTC