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?
Did you know that the "
Seven Sisters" known to the Greeks is the same as the "
Flint Boys" known to the Navajo?
Did you know that solar activity follows an 11-year solar cycle?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
RiparianxRiparian : The bank of a river or other body of water; may include the floodplains
Click on the word to find out!
Research Highlights
Marine scientists long believed that a microbe called Trichodesmium, a member of a group called the cyanobacteria, reigned over the ocean's nitrogen budget. New research results reported on-line today...
Read more![](/olpa/images/microbe1_sm.jpg)