Io / Jupiter Moon Saturn's moon Tethys

Saturn's moon Tethys

Barred spirals differ from normal spiral galaxies in that the arms of the galaxy do not spiral all the way into the center

and physical differences between the rocks that make up Mercury's surface

There is no known star-forming region in our galaxy as large or as prolific as Doradus

as supernovas in a few million years

Io / Jupiter Moon Saturn's moon TethysJupiter's moon Io floats above the cloud tops of Jupiter in this image captured by the Galileo spacecraft January 1, 2001. The image is deceiving: there are 350,000 kilometers roughly 2. 5 Jupiters between Io and Jupiter's clouds. Io is about the size of our own moon.