Explore Mercury
![](/images/icons/mercury_interior.jpg)
Mercury, the innermost planet of the solar system, is a little bigger than the Earth's Moon. ...
Read more
![](/images/icons/mercury_atmosphere.jpg)
Mercury has very little atmosphere. The planet's small size means that its gravity is too weak ...
Read more
![](/images/icons/mercury_magnetosphere.jpg)
Mercury is the only terrestrial planet other than the Earth that has a significant magnetic ...
Read more
![](/images/icons/mercury_poles.jpg)
If Uranus is the "tilted planet", Mercury might be called the "upright planet". The spin axis ...
Read more
![](/images/icons/mercury_facts.jpg)
All of the relevant information about Mercury collected on one page, including details about size, orbit ...
Read more
![](/images/icons/mercury_myth.jpg)
Here are two stories about Mercury, one of the gods in the Roman pantheon. Mercury was identified ...
Read more
![](/images/icons/mercury_missions.jpg)
A table containing information about the spacecraft that have visited Mercury ...
Read more
![](/images/icons/mercury_images.jpg)
Access wonderful captioned photos and illustrations that will inspire and excite you. ...
Read more
![](/images/icons/mercury_links.jpg)
These are links to other great web sites about Mercury. But beware: you don't want to get ...
Read more
Did you know?
What do
White Dwarfs and
Black Holes have in common? Find out in our
Strange Stuff in Space section!
Do you know the difference between weather and climate?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
EutrophicationxEutrophication : Accumulation of nutrients that supports dense growth of algae which decays and depletes the water of oxygen
Click on the word to find out!
Research Highlights
A magnitude-8.1 earthquake and tsunami that killed 192 people last year in Samoa, American Samoa and Tonga was in fact a triple-whammy. The 8.1 "great earthquake" concealed and triggered two...
Read more![](/olpa/images/tonga_quake_small.jpg)