Explore Solar System Discoveries
![](/images/icons/systemdiscovery_mercury.jpg)
Mercury's orbit is so close to the Sun that it is difficult to see by ground-based observers. ...
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![](/images/icons/systemdiscovery_venus.jpg)
Venus is one of the brightest objects in the sky, so it is clearly visible to the naked eye. ...
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![](/images/icons/systemdiscovery_mars.jpg)
Mars is much like Venus-- it's very bright and therefore easily spotted in the night sky. ...
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![](/images/icons/systemdiscovery_jupiter.jpg)
Jupiter is the largest planet in our solar system. It is also one of the brighter objects ...
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![](/images/icons/systemdiscovery_saturn.jpg)
Like the inner planets and Jupiter, Saturn is clearly visible in the night sky. The ancient ...
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![](/images/icons/systemdiscovery_uranus.jpg)
Astronomer William Herschel is credited with the discovery of Uranus in 1781. He was using ...
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![](/images/icons/systemdiscovery_neptune.jpg)
If you had a quiz question in school that asked what year Neptune was discovered, you'd probably ...
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![](/images/icons/systemdiscovery_pluto.gif)
After the discovery of Neptune in 1846, mathematical theory suggested that there still might ...
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![](/images/icons/systemdiscovery_ceres.jpg)
Ceres is the largest asteroid in the main asteroid belt. It was classified as a "dwarf ...
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![](/images/icons/systemdiscovery_haumea.jpg)
Haumea is a dwarf planet in our Solar System. Haumea is the fifth object officially classified ...
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More about Solar System Discoveries
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Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
SeichexSeiche : A standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, and seas. The key requirement for formation of a seiche is that the body of water
Click on the word to find out!
Research Highlights
Glaciovolcanoes, they're called, these rumbling mountains where the orange-red fire of magma meets the frozen blue of glaciers. Iceland's Eyjafjallajökull volcano, which erupted recently, is but one of...
Read more![](/olpa/images/iceland_volcano_small.jpg)