This image shows features on Europa that look like ice rafting on Earth. Taken by the Galileo spacecraft.
Click on image for full size
Image courtesy of NASA
Ice Rafting on Europa?
The surface of Europa shows many signs of that there may be an ocean under the icy surface. For example, this picture shows what look like icebergs on Europa. Some look like they broke off a larger block of ice, floated a bit, and then frozen again into a new position. Geologists believe this shows there is a watery layer underneath the ice. We sometimes see similar ice 'rafts' on Earth, too!
Other signs of an ocean under the icy surface Europa include:
* flooded terrain
* 'mushy' craters
* areas of spreading
Shop Windows to the Universe Science Store!
Our online store
includes issues of NESTA's quarterly journal, The Earth Scientist
, full of classroom activities on different topics in Earth and space science, ranging from seismology
, rocks and minerals
, and Earth system science
You might also be interested in:
This is an example of the surface of Europa. The surface may be flooded by fresh water from underground, which freezes when it touches the surface. The edges of the flow are rounded, like a puddle of water...more
The surface of Europa shows many signs that there may be an ocean under it's icy surface. In this picture, the dimples, shown in red, may be a sign of material falling into a water under the ice. Or they...more
The surface of Europa shows many signs of that there may be an ocean hidden underneath: * flooded areas * 'freckles' * 'rafting' * 'mushy' craters, and * regions of spreading. These clues make it pretty...more
Amalthea was discovered by E Barnard in 1872. Of the 17 moons it is the 3rd closest to Jupiter. Amalthea is about the size of a county or small state. Amalthea is named after the goat in Greek mythology...more
Callisto was first discovered by Galileo in 1610. It is the 2nd largest moon in the solar system, and is larger than the Earth's moon. It is about as big as the distance across the United States. Callisto...more
Measurements by the Galileo spacecraft have been shown that Callisto is the same inside from the center to the surface. This means that Callisto does not have a core at the center. This means that, unlike...more
Many different types of surface are shown in this picture. In the front is a huge crater, which goes for a long way over the surface. This crater could be compared to that of Mimas. They both show that...more