In astronomy, what does retrograde mean? And what connection does it have to astrology? We explain how planets move across ...

Dr. Amina Schartup's research sheds light on how this mercury released through industrial activities like coal burning ...

How hot is Mercury? Mercury's sun-facing side is scorched by temperatures of around 430°C, hot enough to melt lead. Without a substantial atmosphere to distribute heat away from the areas facing the ...

The layers of gases surrounding the surface of a planet make up what is known as an atmosphere. The atmospheres of the terrestrial planets range from thin to thick. Mercury has almost no atmosphere.

Levels have fallen dramatically in the atmosphere - but remained stable in tuna since 1971. Very old mercury lurks deep in the ocean and wells up into the waters where the tuna swim, experts say.