Blue Planet: Earth is known as the Blue Planet because of its bright blue appearance when viewed from space. This colour comes from the huge amount of water that covers around 71% of its surface in ...

Call it the deep blue dot. For the first time, scientists have seen the visible color of a distant alien world. The exoplanet — called HD 189733b — is 63 light-years from Earth and a "deep cobalt blue ...

Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of... Don't look so blue, Neptune: Now astronomers know ...

The outermost ring of the planet Uranus turns out to have a bright blue color, according to a report in the April 7 issue of the journal Science. That makes it only the second blue ring to be found in ...