Search for Extra-terrestrial Intelligence
also know as SETI is useed to determine if there is intelligent life out in the universe.

The moon
Most of the Moon's surface is covered with regolith, a mixture of fine dust and rocky debris produced by meteor impacts.

Saturn's rings
the rings are extremely bright and very large. Are made up mostly of water ice, but they may also include rocky particles with icy coatings.

Titan
titan is the largest moon of Saturn and the second largest moon in the solar system. It is larger than the planets Mercury and Pluto.