Your thumb at arms length is ~2 degrees or ~120 arcminutes wide. The fingernail on your index finger at arm's length is ~1 degree or 60 arcminutes wide. The mo

Your thumb at arms length is ~2 degrees or ~120 arcminutes wide. The fingernail on your index finger at arm's length is ~1 degree or 60 arcminutes wide. The moon is about half a degree or 30 arcminutes wide. This doesn't make sense but give it a try tonight if the moon is out. FWIW many of the galaxies and nebula you see in astrophotography are actually bigger in the night sky than one might guess. Andromeda for example is about 6 times wider than the moon at ~3 degrees across - https://slate.com/technology/2014/01/moon-and-andromeda-relative-size-in-the-sky.html https://slate.com/technology/2014/01/moon-and-andromeda-rela...