ET.From a space exploration point of view, a satellite is a human-made object placed into orbit around a planet, for example the Earth, Saturn or Jupiter. In astronomy, a satellite is any celestial body orbiting around a planet or star, so the moon is a natural or non-artificial satellite of the Earth; the other planets encircling the sun are natural satellites of the sun. Mercury and Venus are the only planets to have no moons. Mars has two small asteroid- like moons called Phobos and Deimos. Saturn has at least 30 orbiting moons. The largest of Saturns moons, Titan, is 1.5 times larger than the Earths moon, making it the second- largest moon in the solar system. Titan is larger than the planets Mercury and Pluto. The four largest of Jupiters 60 moons are Ganymede, Io, Callisto and Europa. These four Galilean satellites were discovered in 1610 and are all planet-sized. Europa has an icy surface at minus 170 C. However, heat linked to volcanic activity on Europa may be sufficient to maintain a layer of liquid water below the ice sheet, making it one of the few places in the solar system capable of sustaining life. This possibility featured in the 1984 science fiction film 2010, based on an Arthur C Clarke novel. NASA now plans to send a probe to Europa to see if it harbours life.

Question: The Earths moon is the third-largest moon in the solar system.
Options:
A. true, B. false, C. uncertain
Answer: "C"