The impeller made out of cast material in many cases may be called rotor, also. It is cheaper to cast the radial impeller right in the support it is fitted on, which is put in motion by the gearbox from an electric motor, combustion engine or by steam driven turbine.
Earth remains the only known planet to host life, due to a unique combination of factors. However, continued monitoring of alien worlds might one day change that, by finding other planets that share these attributes or by discovering other ways that life has found to blossom in the universe.
You could imagine some perfect place inside Uranus, where the temperature could support life. The problem is that the pressures inside Uranus are enormous at those temperatures, and would crush life. The other problem is that life on Earth requires sunlight to provide energy. Thereâs no process inside Uranus, like volcanism on Earth, that would give life inside the planet a form of energy. Life on Uranus would have to be vastly different from anything we have here on Earth to be able to survive. Of course, itâll be almost impossible to ever send a spacecraft down into the planet to look for ourselves. We have written many articles about the search for life in the Solar System.