Astrobiologists say purple planets might be easier to spot than green ones. If alien life uses retinal, exoplanets could shine with a violet glow—making them prime targets for space telescopes.

Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese ... too much from science fiction. Purple oceans would be possible on ...

THE Earth's ocean could one day turn purple - and scientists say it used ... The moon, named Miranda, orbits the planet Uranus - just 1.7 billion miles away in our very own solar system.