So how many stars are there in the Universe? It is easy to ask this question, but difficult for scientists to give a fair answer! Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. The Sun belongs to a galaxy called the Milky Way.
Reverse osmosis. Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.
Reverse Osmosis, most commonly known as an RO system, is a water purification technology that passes the water through a semipermeable membrane to remove the polluting particles. Unlike other water filtering systems, RO is able to remove smaller particles, either dissolved or suspended floating in the water, so the filtered waterâs quality will be better.