Raining is an important natural event that nourishes life... Hold on, would this sentence still be true if it is "iron rain" instead of "water rain"? Wow! The plot of raining molten iron should only appear in the sci-fi thriller...

It is possible to have "iron rain" in reality, but you don't need to worry as it is not a natural phenomenon on Earth. By using the European Southern Observatory's Very Large Telescope, astronomers observed an exoplanet WASP-76b that keeps extreme weather in which there may be "iron rain". The self-rotation period of WASP-76b and the period of it to orbit around its host star are the same. Hence, the same side of it always faces its host star. The side facing the host star is always in the daytime and may reach a temperature of more than 2,400 degrees Celsius, high enough to vaporise metals. The other side of it is always at night, the temperature on the night side can drop to about 1,500 degrees Celsius. The temperature difference between the two sides of the planet generates strong winds, bringing "iron vapour" from the day side to the night side. Vapour condenses into liquid in a lower temperature environment, causing the "iron rain".

Would iron rain nourishes any extraterrestrial creature?

Hence, the same side of the Moon always faces the Earth. This phenomenon is called "tidal locking", which is quite common in the universe.

More information: https://www.eso.org/public/news/eso2005/