Composition of some beautiful moon and planets
Titan ( moon of Saturn)
Titan is the biggest of the known moons orbiting Saturn. It is a cold world enclosed by a thick, hazy atmosphere impenetrable by telescopes and cameras.With an equatorial radius of 2,575 km (1,600 miles), Titan is the second largest moon in our solar system. It's bigger than our own Moon and even the planet Mercury. Only Jupiter's moon Ganymede is larger than Titan, with a diameter barely 112 km (62 miles) greater.The temperature at Titan's surface is about -289 degrees Fahrenheit (-178 degrees Celsius).Titan orbits Saturn at a distance of about 1.2 million km (745,000 miles), taking almost 16 days to complete a full orbit. Titan is the only known moon with a fully developed, planet-like atmosphere. Unfortunately, this thick atmosphere prevented us from learning much about its surface features during the Voyager missions. What we do know is that it appears to be composed of about half water ice and half rocky material. It is believed to be similar in composition to many of Saturn's other moons, but is much denser because of its large size and higher gravity. Titan's atmosphere is believed to have two cloud layers at about 125 miles (200 km) and 186 miles (300 km) above the surface.