Pleiades, in astronomy, a cluster of stars in the constellation Taurus. With a telescope, several hundred stars are visible in the cluster. However, only six stars can be easily seen with the unaided eye. On a very clear night, several more can sometimes be seen. Alcyone is the brightest star in the Pleiades. Bright nebulae (clouds of gas and dust) surround several of the stars in the cluster.
Precipitation does fall from the clouds of other planets, but it's a little more exotic than the good, old-fashioned rainwater we get here on Earth. Imagine sheets of methane, sulfuric acid and, yes, even diamonds falling from the sky.
It's tough to wrap your mind around a time when the Earth wasn't here. So how do Earth and the rest of the planets out there get their start in the universe?