source: Unlike the clouds on Earth, however, which are composed of crystals of ice, Neptune's cirrus clouds are made up of crystals of frozen methane.
target: Unlike the clouds on Earth, which are made of ice crystals, Neptune's cirrus clouds are made of frozen methane crystals.
references: Unlike the clouds on Earth, which are made of ice crystals, Neptune's cirrus clouds are made of frozen methane crystals. The cirrus clouds on Neptune are different from the clouds on earth in composition . The cirrus clouds are composed of crystals of frozen methan . But the clouds on Earth is composed of crystals of ice. Unlike the clouds on Earth, which are made up of ice crystals, Neptune's clouds are made up of frozen methane. Unlike Earth's clouds which are composed of ice crystals, Neptune's cirrus clouds are made of of frozen methane crystals. Unlike the clouds on Earth which are composed of crystals of ice, Neptune's cirrus clouds are made up of crystals of frozen methane. Neptune's cirrus clouds are made up of crystals of frozen methane. While clouds on Earth are made up of crystals of ice, Neptunes's cirrus clouds are made up of crystals of frozen methane.