Possibility of Life in The Ocean
As with Europa and Ganymede, the idea has been raised that extraterrestrial microbial life may exist in a salty ocean under the Callistoan surface. However, the conditions for life appear to be less favorable on Callisto than on Europa. The principal reasons are the lack of contact with rocky material and the lower heat flux from the interior of Callisto. Scientist Torrence Johnson said the following about comparing the odds of life on Callisto with the odds on other Galilean moons:
| “ | The basic ingredients for life—what we call 'pre-biotic chemistry'—are abundant in many solar system objects, such as comets, asteroids and icy moons. Biologists believe liquid water and energy are then needed to actually support life, so it's exciting to find another place where we might have liquid water. But, energy is another matter, and currently, Callisto's ocean is only being heated by radioactive elements, whereas Europa has tidal energy as well, from its greater proximity to Jupiter. | ” |
Based on the considerations mentioned above and on other scientific observations, it is thought that of all of Jupiter's Galilean moons, Europa has the greatest chance of supporting microbial life.
Read more about this topic: Callisto (moon)
Famous quotes containing the words possibility of, possibility, life and/or ocean:
“That though we are certain of many things, yet that Certainty is no absolute Infallibility, there still remains the possibility of our being mistaken in all matters of humane Belief and Inquiry.”
—Joseph Glanvill (1636–1680)
“There’s no possibility of being witty without a little ill-nature—
The malice of a good thing is the barb that makes it stick.”
—Richard Brinsley Sheridan (1751–1816)
“Conventional wisdom notwithstanding, there is no reason either in football or in poetry why the two should not meet in a man’s life if he has the weight and cares about the words.”
—Archibald MacLeish (1892–1982)
“If fishes were wishes the ocean would be all of our desire.”
—Gertrude Stein (1874–1946)