A green-hued comet has made its closest approach to Earth, wowing night ... an ever-changing backdrop of the universe, where distant galaxies gleam in the background, Sultan said.

On Earth, a visible ripple effect occurs when a stone is thrown into the water. In space, a similar phenomenon happens. However, instead of creating waves that can be seen by the human eye or ...

This video shows the habitable zone around the star HD 20794 (in green ... life elsewhere in the Universe. This is the background to the discovery of super-Earth HD 20794 d by an international ...

Although it is common knowledge in modern times that the ocean is blue, billions of years ago it may have been green instead of blue. A team from Nagoya University proposed the 'green ocean ...

For a long stretch of Earth’s history, our planet might have looked green from a distance, instead of the pale blue dot we know today. Earth’s green period, which lasted from around 3 billion ...

Although chlorophyll is great for photosynthesis in the spectra of light visible to us, PEB seems to be superior in green-light conditions. Before the rise of photosynthesis and oxygen ...

Blue-green algae, also called cyanobacteria, were one of the earliest life forms on Earth and contributed heavily to the oxygenation of the planet. Specifically, they triggered the Great Oxidation ...

with the aim of finding life elsewhere in the Universe. This is the background to the discovery of super-Earth HD 20794 d by an international team. The new planet lies in an eccentric orbit ...