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.
Most astronomers feel that it would be impossible for life to exist on Venus. Today, Venus is a very hostile place. It is a very dry planet with no evidence of water, its surface temperature is hot enough to melt lead, and its atmosphere is so thick that the air pressure on its surface is over 90 times that on Earth.Even the spacecraft which have landed on Venus only survived for about an hour before being crushed and melted.There are however, a few scientists who think that it is possible for life to exist in the clouds of Venus.1  Javascript must be enabled to use Cool Cosmos. 2  Learn how.ven the spacecraft which have landed on Venus only survived for about an hour before being crushed and melted. There are however, a few scientists who think that it is possible for life to exist in the clouds of Venus. 1  Javascript must be enabled to use Cool Cosmos. 2  Learn how.