Spanish astronomers have revealed a new theory for a ' Y ' effect on Venus . They believe it is caused by winds forming a ' wave ' of clouds on the planet . These winds move faster at higher altitudes , creating the odd shape . Winds on Venus can circle the planet in four to five Earth days . But the planet takes five Earth days to rotate , amplifying the Y shape .
Spanish astronomers have revealed a new theory for a ' Y ' shape on Venus . They say it is formed by winds pushing a 'wave ' of clouds on the planet . These winds move faster at higher altitudes , creating the odd shape . Winds on Venus can circle the planet in four to five Earth days . But the planet takes 243 Earth days to rotate , amplifying the Y shape .