Uranus

Uranus (Fig.) appears as a green disc with vague markings, even through  the largest telescopes. Its colour is produced  by  the large amounts of methane and ammonia clouds in  its outer atmosphere. The  temperature of  the ammonia clouds is about -217°C. Uranus is made up  of  gases such as hydrogen, helium and methane juslike,Jupiter and  Saturn. Uranus is  unique in  the Solar System because  its axis of rotation  is  tilted  at an angle of  98⁰  to  the perpendicular and  lies almost  in  the plane ofits orbit around  the Sun, with  one pole sometimes pointing directly towards the Sun.  Iwould  seem  that  the planet  has  toppled  over its side, rolling along  the orbit  like a wheel. Thus,  the Sun shines directly on  its poles. Uranus has fifteen satellites. In  1977 nine  faint  rings of  rocky debris were also discovered around Uranus.