Mercury is about 2.6 times smaller than Earth. 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 ...

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

Amina Schartup is a marine biogeochemist at Scripps Institution of Oceanography at UC San Diego. She received her bachelor’s degree from Universite Paris V, her master’s degree from the Institut de ...

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.

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.

Permafrost has accumulated so much mercury that it could dwarf the amount in the oceans, soils, atmosphere, and biosphere ...