How does the composition of an Earth cloud contrast with an astronomical molecular cloud?

Answer

Earth's clouds are dense water concentrations, while molecular clouds are extremely sparse collections of gas and dust

Earth's clouds are condensed, dense water suspended in the atmosphere, whereas astronomical molecular clouds are vast, diffuse interstellar structures composed primarily of gas (hydrogen) and dust.

How does the composition of an Earth cloud contrast with an astronomical molecular cloud?

#Videos

NASA Spotlite: What are clouds made of? - YouTube

waterairgascloudvapor