Neptune and Uranus share so many similarities that some scientists refer to the distant objects as planetary twins. However these ice giants have one big difference which is their colour. Newer space and ground-operated telescope observations have revealed the reason behind their colour difference.
The two planets are the most distant planets from the sun in our solar system. Both Neptune and Uranus have similar sizes, masses and atmospheric conditions. But when you look at images of the planets, Neptune has a bright blue appearance and Uranus is a paler shade of cyan blue.
Astronomers used the Gemini North telescope and NASA Infrared Telescope Facility. Both in Hawaii, and the Hubble Space Telescope to make a model that could match up observations of the planets. Scientists said an excess of haze builds up in Uranus’ atmosphere, which gives it a lighter atmosphere.
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