An image of Saturn taken by the Cassini spacecraft in 2006.
Beyond the rings of Saturn, our earth can be seen as a blob.

This karst spring is named as such due to its strong resemblance to an eye with the various shades of blue and turquoise when seen from above. It is formed by a hole of unknown precise depth, but is said...

The ozone layer is the layer with the highest levels of ozone (O3) in the Earth's atmosphere. This layer absorbs 93-99% of the ultraviolet rays emitted by the sun, which are harmful to terrestrial organisms: ultraviolet rays. About 91% of...

M82, an example of a Starburst galaxy. Its star formation rate is about ten times that of normal galaxies. Stars in galaxies are formed from cold gas that turns into giant molecular clouds. Some galaxies have very high star formation...