What are Outer Planets

# Outer Planets are Jupiter, Saturn, Uranus, Neptune and the dwarf planet – Pluto.

# The four outer planets, called the gas giants, collectively make up 99% of the mass known to orbit the Sun.

# They are composed mainly of hydrogen & helium & lack a solid surface. Their moons are, however, solid.

# The two outermost planets, Uranus and Neptune, are composed of substances called ices, such as water, ammonia and methane, and are often referred to separately as “ice giants”.

# All four gas giants have rings, although only Saturn’s ring system is easily observed from Earth.

# The gas giants have a magnetosphere, numerous moons and significant atmospheric activity.

# Neptune has the strongest wind speed (2,100 km/h) followed by Saturn (1,800 km/h).