Call us for Counseling - 9580048004, For Support - 8860807050.  

Tags Current Affairs

Colour difference in Neptune and Uranus

Date: 03 June 2022 Tags: Geography & Environment


Astronomers have found an explanation for why the Neptune and Uranus planets are different colours.



Neptune and Uranus have similar masses, sizes, and atmospheric compositions but their colour varies.



  • Neptune is a rich, deep azure hue, while Uranus is a distinctly pale shade of cyan at visible wavelengths.

  • Till now, there was no similar data available for comparison, which prevented explanation for the phenomenon.


The new study

  • For the latest study, a single atmospheric model was developed that matched observations of both planets.

  • Observations were made from NASA/ESA Hubble Space Telescope, the Gemini North telescope and the NASA Infrared Telescope Facility. 

  • The most important observation made during the study was that the haze around Uranus is thicker than that around Neptune.



  • The stagnant and sluggish atmosphere of Uranus makes it appear a lighter tone than Neptune. 

  • Neptune and Uranus would have appeared equally blue if there was no haze in the atmospheres of the planets due to scattering of blue light.



  • There are three different aerosol layers in the atmospheres of Neptune and Uranus. The middle layer affects the colours.

  • The middle layer of haze particles is thicker on Uranus than on Neptune. The particles on this layer are made up of condensed methane ice.

  • Since Neptune’s atmosphere is more turbulent than Uranus’, it churns out more methane particles into the haze layer.

  • Due to this process, more haze is removed from the atmosphere, keeping Neptune’s haze layer thinner than it is on Uranus. Due to this Neptune looks darker.

Notice (8): Undefined variable: quizpole [ROOT/plugins/Studyiq/src/Template/Pages/tagdetails.ctp, line 161]