Explore Planets
![](/images/icons/systemplanet_whatis.jpg)
It may surprise you, but astronomers don't really have a good definition of a "planet". Because ...
Read more
![](/images/icons/systemplanet_mercury.jpg)
Mercury, the planet nearest the Sun, is also the smallest planet in the Solar System. Only ...
Read more
![](/images/icons/systemplanet_venus.jpg)
Fair but inhospitable Venus, a "Sister" planet to the Earth that is very different from our ...
Read more
![](/images/icons/systemplanet_earth.jpg)
Earth, our home planet, is a beautiful blue and white ball when seen from space. ...
Read more
![](/images/icons/systemplanet_mars.jpg)
Mars, Earth's outer neighbor, is the fourth planet from the Sun. Mars' bright appearance and ...
Read more
![](/images/icons/systemplanet_jupiter.jpg)
Jupiter is the largest planet in the solar system. When approached from afar, its fantastic ...
Read more
![](/images/icons/systemplanet_saturn.jpg)
Saturn, the sixth planet from the Sun, has the most spectacular set of rings in the solar system. ...
Read more
![](/images/icons/systemplanet_uranus.jpg)
Uranus, the seventh planet from the Sun, has its spin axis almost in the plane of its orbit ...
Read more
![](/images/icons/systemplanet_neptune.jpg)
Neptune, the eighth and furthest planet from the Sun, is a very cold place. Its bluish color ...
Read more
![](/images/icons/systemplanet_pluto.jpg)
In 2006 the International Astronomical Union (IAU) approved a new classification scheme for ...
Read more
Did you know?
Did you know that the
Maya and the
Aztecs were early observers of
Venus?
Did you know that there is a strange hexagon in the atmosphere at the northern pole of Saturn?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
SlickensidesxSlickensides : Slickensides are polished striated rock surfaces caused by one rock mass moving across another on a fault.
Click on the word to find out!
Research Highlights
The economic growth across much of Asia comes with a side effect: pollutants from the region are wafting up to the stratosphere during monsoon season. The new finding, in a study led by scientists at the...
Read more![](/olpa/images/pollution1_h.jpg)