Homework #5

1. For a few of the most important past, present, or future robotic missions to the solar system, describe their targets, types, and mission highlights.
     Mars Opportunity Rover:
                                             -Target: Mars
                                             -Type: Rover
                                             -Highlights: Proved that at one point there was enough water to sustain                                                                      microbial life on mars

Voyager 1
                                             -Target: Jupiter, Saturn
                                             -Type: Flyby
                                             -Highlights: Launched during a special planetary lineup that only                                                           happens once every 176 years. Also, is carrying a time capsule of earth                                                 history
Europa Mission
                                              -Target: Europa
                                             -Type: Orbiter
                                             -Highlights: Has not launched yet but will study to see if Europa can                                                       support life
 2. What is the potential significance of atmospheric methane to the search for life on Mars? Are there other explanations for the methane?
     On Earth most Methane is accounted for by biological processes. However, it could just be that the Mars Rover experienced a local spike in methane that lay dormant under the martian surface.

 3. Describe the evidence for subsurface oceans on Ganymede and Callisto. What are the prospects for life on these worlds?
     Changing amounts of electrical currents beneath the surface of Callisto and Ganymede can point to a liquid ocean under their surfaces. If there was life on this world it would be very primordial due to the fact that chemical reactions are slower in colder climates.