Good posture is an easy and very important way to maintain a healthy mind and body. When you practice correct posture, your body is in alignment with itself. This can alleviate common problems such as back or neck pain, headaches, and fatigue.
There are roughly 500 billion galaxies in the universe, meaning there is somewhere in the region of 50,000,000,000,000,000,000,000 (5Ã1022) habitable planets. Iâll leave you to do the math on whether one of those 50 sextillion planets has the right conditions for nurturing alien life or not.
Insofar as galaxies go, as there are somewhere between 100 billion and 200 billion galaxies in the known Universe, so your last question is also impossible to answer. Here's a deep space shot from the Hubble; every blob of light is a galaxy: Insofar as our galactic neighbors go: I hope that's helpful.