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Chapter 13: Problem 55

Speculate on the possibility that Europa, Ganymede, or Callisto might harbor some sort of life. Explain your reasoning.

Short Answer

Expert verified
Given current knowledge, it is plausible to speculate that there could be life, especially microbial, on Europa and possibly Ganymede due to the suspected presence of subsurface oceans. Callisto appears least likely to harbor life, but as understanding of these environments increases, so too does the potential for surprise.

Step by step solution

01

Europa

Begin by understanding Europa, one of Jupiter's largest moons and note its surface covered by ice. Research points to a possible subsurface ocean of salty liquid water, kept warm by tidal forces from Jupiter's gravitational pull. Liquid water along with certain chemical elements may be prime conditions for potential life.
02

Ganymede

Move onto Ganymede which is the largest moon in the solar system. Similar to Europa, Ganymede is believed to have a subsurface ocean. However, the environment is drastically colder and harsher, which reduces its potential to harbor life.
03

Callisto

Lastly, investigate Callisto, which is noted for its heavily cratered and ancient surface. The prospects for life existing on Callisto are considered the least likely as it lacks geological activity. However, the possibility cannot be entirely ruled out since there could be a subsurface ocean.

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Most popular questions from this chapter

Saturn's equator is tilted by \(27^{\circ}\) from the ecliptic, while Jupiter's equator is tilted by only \(3^{\circ}\). Use these data to explain why we see fewer transits, eclipses, and occultations of Saturn's satellites than of the Galilean satellites.

In the classic science-fiction film 2010: The Year We Make Contact, an alien intelligence causes Jupiter to contract so much that nuclear reactions begin at its center. As a result, Jupiter becomes a star like the Sun. Is this possible in principle? Explain your answer.

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