Which planet is the 7th from the Sun and rotates on its side with a blue-green color due to methane?

Which planet is the 7th from the Sun and rotates on its side with a blue-green color due to methane?

• A. Neptune
• B. Jupiter
• C. Uranus
• D. Saturn

Answer: (C)

Uranus fits this description: it is the seventh planet from the Sun. It spins with a very large tilt—about 98 degrees—so it effectively rolls on its side as it orbits. Its pale blue-green color comes from methane in its atmosphere, which absorbs red light and reflects blue-green wavelengths. Neptune also looks blue due to methane, but it is farther out and is the eighth planet, not the seventh.

Uranus fits this description: it is the seventh planet from the Sun. It spins with a very large tilt—about 98 degrees—so it effectively rolls on its side as it orbits. Its pale blue-green color comes from methane in its atmosphere, which absorbs red light and reflects blue-green wavelengths. Neptune also looks blue due to methane, but it is farther out and is the eighth planet, not the seventh.