Explore Planets
![](/images/icons/systemplanet_whatis.jpg)
Do you know what a planet is? If so, you are doing better than professional astronomers! Right ...
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![](/images/icons/systemplanet_mercury.jpg)
Mercury, the planet nearest the Sun, is the second smallest planet in the solar system. Only ...
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![](/images/icons/systemplanet_venus.jpg)
Fair but inhospitable Venus, a "Sister" planet to the Earth that is very different from our ...
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![](/images/icons/systemplanet_earth.jpg)
Earth, our home planet, is a beautiful blue and white ball when seen from space. ...
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![](/images/icons/systemplanet_mars.jpg)
Mars, Earth's outer neighbor, is the fourth planet from the Sun. Mars' bright appearance and ...
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![](/images/icons/systemplanet_jupiter.jpg)
Jupiter is the largest planet in the solar system. When approached from afar, its fantastic ...
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![](/images/icons/systemplanet_saturn.jpg)
Saturn, the sixth planet from the Sun, has the most spectacular set of rings in the solar system. ...
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![](/images/icons/systemplanet_uranus.jpg)
Uranus, the seventh planet from the Sun, has its spin axis almost in the plane of its orbit ...
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![](/images/icons/systemplanet_neptune.jpg)
Neptune, the eighth and furthest planet from the Sun, is a very cold place. Its bluish color ...
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![](/images/icons/systemplanet_pluto.jpg)
In 2006 the International Astronomical Union (IAU) approved a new classification scheme for ...
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Did you know?
Did you know that the
Maya and the
Aztecs were early observers of
Venus?
Did you know that the Phoenix Mars Lander landed on Mars on 25 May, 2008?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
GrabenxGraben : A graben is a down-dropped block of the earth's crust resulting from extension, or pulling, of the crust.
Click on the word to find out!
Research Highlights
In the spring of 2010, the eruption of a volcano called Eyjafjallajökull in Iceland cancelled many flights in Europe. Eyjafjallajökull is a glaciovolcano, which means it's a volcano that is covered by...
Read more![](/olpa/images/iceland_volcano_small.jpg)